please review what you need to do for setting up the scd30 sensor<\/a><\/p>\r\nRaspberry pi OS<\/h3>\r\nThe following instructions are for both the Raspberry pi zero and 3B<\/p>\r\n\r\nDownload the Latest PI OS from https:\/\/www.raspberrypi.org\/software\/<\/a><\/li>\r\nUse your PC or Mac to run the application for putting the OS on your memory card.<\/li>\r\n<\/li>\r\nDo not install the lite OS version.<\/li>\r\n<\/ul>\r\nLoading the OS on the Pi<\/h3>\r\n\r\nAttach Kneeboard and Mouse to USB ports<\/li>\r\nAttach HDMI cable to Monitor and Pi<\/li>\r\nAttach Ethernet Cable (optional)<\/li>\r\nAttach Power Supply to Pi<\/li>\r\nAs it boots, follow the instructions on the Monitor.<\/li>\r\nThe last part will ask for Update Software.\r\n\r\nJust take a break. This will take some time.<\/li>\r\n<\/ul>\r\n<\/li>\r\nWhen finished, select restart.<\/li>\r\n<\/ul>\r\nSetting up the environment for the Pi.<\/h3>\r\n\r\nAfter reboot\r\n\r\nClick on the Raspberry pi at the top left.<\/li>\r\nSelect Preferences<\/li>\r\nSelect Raspberry PI Configuration<\/li>\r\nSelect interfaces<\/li>\r\nEnable SSH, VNC, and I2C<\/li>\r\nSelect Location<\/li>\r\nSet Time zone US and (your local time zone)<\/li>\r\nSelect System<\/li>\r\nChange Password<\/li>\r\n<\/ul>\r\n<\/li>\r\n<\/ul>\r\n\n \t\t\t\n\t\t\t \n \n \n\t\t\t \n\t\t\t \n\t\t\t \n\t\t\t\t\t\n\t\t\t \n\t\t\t \n\t\t\t <\/div>\n\t\t\t<\/form>\r\nSSH into the Pi\u00a0<\/h3>\r\nYou can now disconnect HDMI, USB from the Pi. No longer needed.<\/p>\r\n\r\nNote the IP address by left-clicking on the Wi-Fi icon on the top right side. You will need it to SSH.<\/li>\r\nThere are several apps for SSH into the Pi.\r\n\r\nI like to use Bitvise on my computer.\u00a0<\/li>\r\nIf you haven’t download Bitvise: SSH software for Windows, <\/a>do it now.<\/li>\r\nOn the Pi, which is a Linux system. You will need to learn how to use an editor for it. The most common is the nano. It is just a line command editor that comes with the Pi OS.<\/li>\r\nLog in as the User Pi and the password.<\/li>\r\nThe default password is \u201craspberry if you did not change it.<\/li>\r\n<\/ul>\r\n<\/li>\r\n<\/ul>\r\nThere now more tweaks that we need to add to the PI OS.<\/p>\r\n\r\nMake a static IP address.\u00a0\u00a0\r\n\r\nThere are two kinds of IP address, DHCP and Static.\u00a0 DHCP means the router will assign an IP address. This can be random and change from time to time. We need to have an IP that is always the same.\u00a0 Most IP addresses from 2 to 255. If you have access to the router you can set up a static there if not choose a number that is 200 or higher and follow this URL: (link<\/a>)\u00a0<\/li>\r\nOne way to see if an IP is being used is to run cmd on your computer and type arp -a. This will give a list of most IP’s being used on your local network.<\/li>\r\nIt is possible that if you choose an IP that is not currently being used and you could get a duplicate IP address error.<\/li>\r\n<\/ul>\r\n<\/li>\r\n\r\nadd software for the creating web Pages<\/h2>\r\n\r\n\r\n\r\nIn order to have a web page to display the CO2 data, we will use a web server. The APACHE service will provide this option.<\/li>\r\nInstall the following from: How to Setup a Raspberry Pi Apache Web Server – Pi My Life Up<\/a>.<\/li>\r\n<\/ul>\r\n<\/li>\r\n<\/ul>\r\n<\/li>\r\n<\/ul>\r\nnote in order to have read-write to the HTML directory dot the following;<\/p>\r\n\r\n\r\n\r\ncd \/var\/www<\/li>\r\nsudo chmod 777 html<\/li>\r\n<\/ul>\r\n<\/li>\r\n\r\nAdd Plotting software:<\/h2>\r\n<\/li>\r\n<\/ul>\r\n\r\nFollow the link below:<\/p>\r\nsudo apt install python3-matplotlib<\/code><\/pre>\r\nsudo pip3 install matplotlib\r\ncreat a test file name it testplot.py\r\n\r\nimport matplotlib.pyplot as plt #import the Python Matplotlib sub-module for graph plotting pyplot.\r\nx = [1,2,3,4] # x axis\r\ny = [1,2,3,4] # y axis\r\nplt.plot(x,y)# plotting the graph\r\n#plt.show() #Displaying the figures\r\nplt.savefig('Matplotlib_save_plot.png')<\/code><\/pre>\r\nsudo reboot from the xterm<\/p>\r\nrun with \u201cpython3 testplot.py\u201d<\/p>\r\nThis will create a png file. Duble click on it from the remoter ssh file manger and you see the following graph.<\/p>\r\n<\/p>\r\n\r\nSet up the run environment\r\n\r\nOn the PC download the zip file.\r\n\r\nin your browser type larry4u.com\/data<\/li>\r\nclick on data_co2SCD30.7z this will download all files need to run the programs.<\/li>\r\nunzip the file copy the files to the Pi using Bitvise, as follows:\r\n\r\nto the pi home directory (\/home\/pi) using your mouse move these files:\r\n\r\nclean_data_folder.py<\/li>\r\ndisplay_co2.py<\/li>\r\nexample.py<\/li>\r\nget_co2.py<\/li>\r\nreadCSV.py<\/li>\r\nscd30.py<\/li>\r\ntestplot.py<\/li>\r\nVCR_OSD_MONO_1.001.ttf<\/li>\r\n<\/ul>\r\n<\/li>\r\nMove these files to \/var\/www\/html and delete the index.html\r\n\r\nindex.php<\/li>\r\ndownload.php<\/li>\r\nselectFile.php<\/li>\r\n<\/ul>\r\n<\/li>\r\nNeed one more file by doing a symbolical link to the data_folder in the pi home directory\r\n\r\ncopy and paste the following in the xterm:\r\n\r\ncd \/var\/www\/html<\/li>\r\nln -s \/home\/pi\/data_folder data_folder<\/li>\r\nls -ltra\u00a0 (this will show all the files plus the linked data_folder<\/li>\r\n<\/ul>\r\n<\/li>\r\n<\/ul>\r\n<\/li>\r\n<\/ul>\r\n<\/li>\r\n<\/ul>\r\n<\/li>\r\n<\/ul>\r\n<\/li>\r\nLoad the software for controlling the display module\r\n\r\nFollow the following link: Using an I2C OLED Display Module with the Raspberry Pi – Raspberry Pi Spy (raspberrypi-spy.co.uk)<\/a><\/li>\r\n<\/ul>\r\n<\/li>\r\n\r\nConnecting the SCD30 Hardware<\/strong><\/p>\r\n\r\nBreak off 4 of the male-to-male pins<\/li>\r\nPut on the first four pinholes of the SCD30 and solder.<\/li>\r\n<\/li>\r\n<\/ul>\r\nSCD30 connection<\/strong><\/p>\r\n\r\nVDD 3v3 Power pin 1<\/li>\r\nGND Ground pin 6<\/li>\r\nTX\/SCL I2CL SDA pin 5<\/li>\r\nRX\/SDA I2C SDA pin 3<\/li>\r\nPINs as per the chart<\/li>\r\n<\/ul>\r\n <\/p>\r\n <\/p>\r\nSteps to read data from SCD30<\/strong><\/p>\r\n<\/li>\r\n\r\n <\/p>\r\n\r\nfallow instructions from GitHub – paulvha\/scd30_on_raspberry: Program to set and read SCD30 on a raspberry Pi<\/a><\/li>\r\nTo test if the pi sees the sensor works, run the example.py file you copy to \/home\/pi directory.<\/li>\r\nIn your SSH terminal at the pi home directory, type:<\/li>\r\npython3 -m pip install scd30_i2c<\/li>\r\nPython3 example.py<\/li>\r\n<\/ul>\r\n\r\nIf you see this, the wiring is right.<\/li>\r\n<\/ul>\r\nWrite data to the monitor.<\/strong><\/p>\r\n\r\nCreate a folder \u201cdata_folder\u201d with the following command:<\/li>\r\n<\/ul>\r\n\r\n\r\n\r\n\r\n\r\nIn the SSH terminal, type at the pi home directory:\r\n\r\nmkdir data_folder<\/li>\r\n<\/ul>\r\n<\/li>\r\n<\/ul>\r\n<\/li>\r\n<\/ul>\r\n<\/li>\r\n<\/ul>\r\n\r\nRun the script scd30.py that you put in the pi directory.\r\n\r\nfrom SSH type “python3 scd30.py”<\/li>\r\n<\/ul>\r\n<\/li>\r\n\u00a0<\/li>\r\nThis script reads the SCD30 data and updates the current.txt file that the Website sees and also writes the data to a daily file in the data_folder.<\/li>\r\n<\/ul>\r\n\r\n\u00a0<\/li>\r\nThis will run the scd30.py every minute and update the “current.txt” file, which uploaded to the web page.<\/li>\r\n<\/ul>\r\n<\/li>\r\n\r\nCreate a crontab job<\/strong><\/p>\r\n\r\nA cron job is an automated program developed for Unix and Linux systems. It allows the user to execute several commands at a specific time on a precise date.<\/li>\r\nWe need to run the python script scd30.py every minute. To do that, we use the command crontab.<\/li>\r\n“crontab \u2013l” (that is, lowercase L” lists what is in the file, and crontab \u2013e lets us edit or add new jobs.<\/li>\r\nType\u00a0 crontab \u2013e<\/li>\r\nIt now asks what editor to use.<\/li>\r\n\/bin\/nano works much like note pad.<\/li>\r\nvim is used mostly by gurus.<\/li>\r\ned is an ancient editor.<\/li>\r\nIf new to Unix, use nano.<\/li>\r\nAdd this line to the bottom of the file:\r\n\r\n* * * * * python3 \/home\/pi\/scd30.py<\/li>\r\n* * * * * python3 \/home\/pi\/readCSV.py > \/home\/pi\/CSV.log<\/li>\r\n* * * * * python \/home\/pi\/get_co2.py > \/home\/pi\/get_co2.log<\/li>\r\n5 0 * * * python \/home\/pi\/clean_data_folder.py\u00a0 >\u00a0 \/home\/pi\/clean.log<\/li>\r\n<\/ul>\r\n<\/li>\r\nThis will run these programs at a scheduletime.<\/li>\r\nsee Crontab.guru – The cron schedule expression editor<\/a> for corn details.<\/li>\r\n<\/ul>\r\nNotes<\/strong><\/p>\r\n\r\nThe “current.txt” file is just an HTML file the is updated by the program scd30.py<\/li>\r\nThe data files in the directory “data_folder” and are created at the first run after midnight. The files names contain the date it was created. They are CSV files that can be open in excel.<\/li>\r\ni2cdetect -y 1\u00a0 use this command to test that the monitor and the sense are working. This is what you should see. 3c is the monitor and 61 is the scd30 sensro.<\/li>\r\n<\/ul>\r\n\n \t\t\t\n\t\t\t \n \n \n\t\t\t \n\t\t\t \n\t\t\t \n\t\t\t\t\t\n\t\t\t \n\t\t\t \n\t\t\t <\/div>\n\t\t\t<\/form>\r\n <\/p>\r\n<\/li>\r\n<\/ul>\r\n <\/p>\r\n<\/div>","protected":false},"excerpt":{"rendered":"DIY Make CO2\u00a0Sensor please review what you need to do for setting up the scd30 sensor Raspberry pi OS The following instructions are for both the Raspberry pi zero and 3B Download the Latest PI OS from https:\/\/www.raspberrypi.org\/software\/ Use your …<\/span> Continue reading →<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"open","ping_status":"closed","template":"","meta":{"_coblocks_attr":"","_coblocks_dimensions":"","_coblocks_responsive_height":"","_coblocks_accordion_ie_support":""},"_links":{"self":[{"href":"https:\/\/www.larry4u.com\/co2diy.com\/wp-json\/wp\/v2\/pages\/21"}],"collection":[{"href":"https:\/\/www.larry4u.com\/co2diy.com\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/www.larry4u.com\/co2diy.com\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/www.larry4u.com\/co2diy.com\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.larry4u.com\/co2diy.com\/wp-json\/wp\/v2\/comments?post=21"}],"version-history":[{"count":67,"href":"https:\/\/www.larry4u.com\/co2diy.com\/wp-json\/wp\/v2\/pages\/21\/revisions"}],"predecessor-version":[{"id":568,"href":"https:\/\/www.larry4u.com\/co2diy.com\/wp-json\/wp\/v2\/pages\/21\/revisions\/568"}],"wp:attachment":[{"href":"https:\/\/www.larry4u.com\/co2diy.com\/wp-json\/wp\/v2\/media?parent=21"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}
The following instructions are for both the Raspberry pi zero and 3B<\/p>\r\n
You can now disconnect HDMI, USB from the Pi. No longer needed.<\/p>\r\n
There now more tweaks that we need to add to the PI OS.<\/p>\r\n
note in order to have read-write to the HTML directory dot the following;<\/p>\r\n
Follow the link below:<\/p>\r\n
sudo apt install python3-matplotlib<\/code><\/pre>\r\nsudo pip3 install matplotlib\r\ncreat a test file name it testplot.py\r\n\r\nimport matplotlib.pyplot as plt #import the Python Matplotlib sub-module for graph plotting pyplot.\r\nx = [1,2,3,4] # x axis\r\ny = [1,2,3,4] # y axis\r\nplt.plot(x,y)# plotting the graph\r\n#plt.show() #Displaying the figures\r\nplt.savefig('Matplotlib_save_plot.png')<\/code><\/pre>\r\nsudo reboot from the xterm<\/p>\r\nrun with \u201cpython3 testplot.py\u201d<\/p>\r\nThis will create a png file. Duble click on it from the remoter ssh file manger and you see the following graph.<\/p>\r\n<\/p>\r\n\r\nSet up the run environment\r\n\r\nOn the PC download the zip file.\r\n\r\nin your browser type larry4u.com\/data<\/li>\r\nclick on data_co2SCD30.7z this will download all files need to run the programs.<\/li>\r\nunzip the file copy the files to the Pi using Bitvise, as follows:\r\n\r\nto the pi home directory (\/home\/pi) using your mouse move these files:\r\n\r\nclean_data_folder.py<\/li>\r\ndisplay_co2.py<\/li>\r\nexample.py<\/li>\r\nget_co2.py<\/li>\r\nreadCSV.py<\/li>\r\nscd30.py<\/li>\r\ntestplot.py<\/li>\r\nVCR_OSD_MONO_1.001.ttf<\/li>\r\n<\/ul>\r\n<\/li>\r\nMove these files to \/var\/www\/html and delete the index.html\r\n\r\nindex.php<\/li>\r\ndownload.php<\/li>\r\nselectFile.php<\/li>\r\n<\/ul>\r\n<\/li>\r\nNeed one more file by doing a symbolical link to the data_folder in the pi home directory\r\n\r\ncopy and paste the following in the xterm:\r\n\r\ncd \/var\/www\/html<\/li>\r\nln -s \/home\/pi\/data_folder data_folder<\/li>\r\nls -ltra\u00a0 (this will show all the files plus the linked data_folder<\/li>\r\n<\/ul>\r\n<\/li>\r\n<\/ul>\r\n<\/li>\r\n<\/ul>\r\n<\/li>\r\n<\/ul>\r\n<\/li>\r\n<\/ul>\r\n<\/li>\r\nLoad the software for controlling the display module\r\n\r\nFollow the following link: Using an I2C OLED Display Module with the Raspberry Pi – Raspberry Pi Spy (raspberrypi-spy.co.uk)<\/a><\/li>\r\n<\/ul>\r\n<\/li>\r\n\r\nConnecting the SCD30 Hardware<\/strong><\/p>\r\n\r\nBreak off 4 of the male-to-male pins<\/li>\r\nPut on the first four pinholes of the SCD30 and solder.<\/li>\r\n<\/li>\r\n<\/ul>\r\nSCD30 connection<\/strong><\/p>\r\n\r\nVDD 3v3 Power pin 1<\/li>\r\nGND Ground pin 6<\/li>\r\nTX\/SCL I2CL SDA pin 5<\/li>\r\nRX\/SDA I2C SDA pin 3<\/li>\r\nPINs as per the chart<\/li>\r\n<\/ul>\r\n <\/p>\r\n <\/p>\r\nSteps to read data from SCD30<\/strong><\/p>\r\n<\/li>\r\n\r\n <\/p>\r\n\r\nfallow instructions from GitHub – paulvha\/scd30_on_raspberry: Program to set and read SCD30 on a raspberry Pi<\/a><\/li>\r\nTo test if the pi sees the sensor works, run the example.py file you copy to \/home\/pi directory.<\/li>\r\nIn your SSH terminal at the pi home directory, type:<\/li>\r\npython3 -m pip install scd30_i2c<\/li>\r\nPython3 example.py<\/li>\r\n<\/ul>\r\n\r\nIf you see this, the wiring is right.<\/li>\r\n<\/ul>\r\nWrite data to the monitor.<\/strong><\/p>\r\n\r\nCreate a folder \u201cdata_folder\u201d with the following command:<\/li>\r\n<\/ul>\r\n\r\n\r\n\r\n\r\n\r\nIn the SSH terminal, type at the pi home directory:\r\n\r\nmkdir data_folder<\/li>\r\n<\/ul>\r\n<\/li>\r\n<\/ul>\r\n<\/li>\r\n<\/ul>\r\n<\/li>\r\n<\/ul>\r\n\r\nRun the script scd30.py that you put in the pi directory.\r\n\r\nfrom SSH type “python3 scd30.py”<\/li>\r\n<\/ul>\r\n<\/li>\r\n\u00a0<\/li>\r\nThis script reads the SCD30 data and updates the current.txt file that the Website sees and also writes the data to a daily file in the data_folder.<\/li>\r\n<\/ul>\r\n\r\n\u00a0<\/li>\r\nThis will run the scd30.py every minute and update the “current.txt” file, which uploaded to the web page.<\/li>\r\n<\/ul>\r\n<\/li>\r\n\r\nCreate a crontab job<\/strong><\/p>\r\n\r\nA cron job is an automated program developed for Unix and Linux systems. It allows the user to execute several commands at a specific time on a precise date.<\/li>\r\nWe need to run the python script scd30.py every minute. To do that, we use the command crontab.<\/li>\r\n“crontab \u2013l” (that is, lowercase L” lists what is in the file, and crontab \u2013e lets us edit or add new jobs.<\/li>\r\nType\u00a0 crontab \u2013e<\/li>\r\nIt now asks what editor to use.<\/li>\r\n\/bin\/nano works much like note pad.<\/li>\r\nvim is used mostly by gurus.<\/li>\r\ned is an ancient editor.<\/li>\r\nIf new to Unix, use nano.<\/li>\r\nAdd this line to the bottom of the file:\r\n\r\n* * * * * python3 \/home\/pi\/scd30.py<\/li>\r\n* * * * * python3 \/home\/pi\/readCSV.py > \/home\/pi\/CSV.log<\/li>\r\n* * * * * python \/home\/pi\/get_co2.py > \/home\/pi\/get_co2.log<\/li>\r\n5 0 * * * python \/home\/pi\/clean_data_folder.py\u00a0 >\u00a0 \/home\/pi\/clean.log<\/li>\r\n<\/ul>\r\n<\/li>\r\nThis will run these programs at a scheduletime.<\/li>\r\nsee Crontab.guru – The cron schedule expression editor<\/a> for corn details.<\/li>\r\n<\/ul>\r\nNotes<\/strong><\/p>\r\n\r\nThe “current.txt” file is just an HTML file the is updated by the program scd30.py<\/li>\r\nThe data files in the directory “data_folder” and are created at the first run after midnight. The files names contain the date it was created. They are CSV files that can be open in excel.<\/li>\r\ni2cdetect -y 1\u00a0 use this command to test that the monitor and the sense are working. This is what you should see. 3c is the monitor and 61 is the scd30 sensro.<\/li>\r\n<\/ul>\r\n\n \t\t\t\n\t\t\t \n \n \n\t\t\t \n\t\t\t \n\t\t\t \n\t\t\t\t\t\n\t\t\t \n\t\t\t \n\t\t\t <\/div>\n\t\t\t<\/form>\r\n <\/p>\r\n<\/li>\r\n<\/ul>\r\n <\/p>\r\n<\/div>","protected":false},"excerpt":{"rendered":"DIY Make CO2\u00a0Sensor please review what you need to do for setting up the scd30 sensor Raspberry pi OS The following instructions are for both the Raspberry pi zero and 3B Download the Latest PI OS from https:\/\/www.raspberrypi.org\/software\/ Use your …<\/span> Continue reading →<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"open","ping_status":"closed","template":"","meta":{"_coblocks_attr":"","_coblocks_dimensions":"","_coblocks_responsive_height":"","_coblocks_accordion_ie_support":""},"_links":{"self":[{"href":"https:\/\/www.larry4u.com\/co2diy.com\/wp-json\/wp\/v2\/pages\/21"}],"collection":[{"href":"https:\/\/www.larry4u.com\/co2diy.com\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/www.larry4u.com\/co2diy.com\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/www.larry4u.com\/co2diy.com\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.larry4u.com\/co2diy.com\/wp-json\/wp\/v2\/comments?post=21"}],"version-history":[{"count":67,"href":"https:\/\/www.larry4u.com\/co2diy.com\/wp-json\/wp\/v2\/pages\/21\/revisions"}],"predecessor-version":[{"id":568,"href":"https:\/\/www.larry4u.com\/co2diy.com\/wp-json\/wp\/v2\/pages\/21\/revisions\/568"}],"wp:attachment":[{"href":"https:\/\/www.larry4u.com\/co2diy.com\/wp-json\/wp\/v2\/media?parent=21"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}
sudo pip3 install matplotlib\r\ncreat a test file name it testplot.py\r\n\r\nimport matplotlib.pyplot as plt #import the Python Matplotlib sub-module for graph plotting pyplot.\r\nx = [1,2,3,4] # x axis\r\ny = [1,2,3,4] # y axis\r\nplt.plot(x,y)# plotting the graph\r\n#plt.show() #Displaying the figures\r\nplt.savefig('Matplotlib_save_plot.png')<\/code><\/pre>\r\nsudo reboot from the xterm<\/p>\r\nrun with \u201cpython3 testplot.py\u201d<\/p>\r\nThis will create a png file. Duble click on it from the remoter ssh file manger and you see the following graph.<\/p>\r\n<\/p>\r\n\r\nSet up the run environment\r\n\r\nOn the PC download the zip file.\r\n\r\nin your browser type larry4u.com\/data<\/li>\r\nclick on data_co2SCD30.7z this will download all files need to run the programs.<\/li>\r\nunzip the file copy the files to the Pi using Bitvise, as follows:\r\n\r\nto the pi home directory (\/home\/pi) using your mouse move these files:\r\n\r\nclean_data_folder.py<\/li>\r\ndisplay_co2.py<\/li>\r\nexample.py<\/li>\r\nget_co2.py<\/li>\r\nreadCSV.py<\/li>\r\nscd30.py<\/li>\r\ntestplot.py<\/li>\r\nVCR_OSD_MONO_1.001.ttf<\/li>\r\n<\/ul>\r\n<\/li>\r\nMove these files to \/var\/www\/html and delete the index.html\r\n\r\nindex.php<\/li>\r\ndownload.php<\/li>\r\nselectFile.php<\/li>\r\n<\/ul>\r\n<\/li>\r\nNeed one more file by doing a symbolical link to the data_folder in the pi home directory\r\n\r\ncopy and paste the following in the xterm:\r\n\r\ncd \/var\/www\/html<\/li>\r\nln -s \/home\/pi\/data_folder data_folder<\/li>\r\nls -ltra\u00a0 (this will show all the files plus the linked data_folder<\/li>\r\n<\/ul>\r\n<\/li>\r\n<\/ul>\r\n<\/li>\r\n<\/ul>\r\n<\/li>\r\n<\/ul>\r\n<\/li>\r\n<\/ul>\r\n<\/li>\r\nLoad the software for controlling the display module\r\n\r\nFollow the following link: Using an I2C OLED Display Module with the Raspberry Pi – Raspberry Pi Spy (raspberrypi-spy.co.uk)<\/a><\/li>\r\n<\/ul>\r\n<\/li>\r\n\r\nConnecting the SCD30 Hardware<\/strong><\/p>\r\n\r\nBreak off 4 of the male-to-male pins<\/li>\r\nPut on the first four pinholes of the SCD30 and solder.<\/li>\r\n<\/li>\r\n<\/ul>\r\nSCD30 connection<\/strong><\/p>\r\n\r\nVDD 3v3 Power pin 1<\/li>\r\nGND Ground pin 6<\/li>\r\nTX\/SCL I2CL SDA pin 5<\/li>\r\nRX\/SDA I2C SDA pin 3<\/li>\r\nPINs as per the chart<\/li>\r\n<\/ul>\r\n <\/p>\r\n <\/p>\r\nSteps to read data from SCD30<\/strong><\/p>\r\n<\/li>\r\n\r\n <\/p>\r\n\r\nfallow instructions from GitHub – paulvha\/scd30_on_raspberry: Program to set and read SCD30 on a raspberry Pi<\/a><\/li>\r\nTo test if the pi sees the sensor works, run the example.py file you copy to \/home\/pi directory.<\/li>\r\nIn your SSH terminal at the pi home directory, type:<\/li>\r\npython3 -m pip install scd30_i2c<\/li>\r\nPython3 example.py<\/li>\r\n<\/ul>\r\n\r\nIf you see this, the wiring is right.<\/li>\r\n<\/ul>\r\nWrite data to the monitor.<\/strong><\/p>\r\n\r\nCreate a folder \u201cdata_folder\u201d with the following command:<\/li>\r\n<\/ul>\r\n\r\n\r\n\r\n\r\n\r\nIn the SSH terminal, type at the pi home directory:\r\n\r\nmkdir data_folder<\/li>\r\n<\/ul>\r\n<\/li>\r\n<\/ul>\r\n<\/li>\r\n<\/ul>\r\n<\/li>\r\n<\/ul>\r\n\r\nRun the script scd30.py that you put in the pi directory.\r\n\r\nfrom SSH type “python3 scd30.py”<\/li>\r\n<\/ul>\r\n<\/li>\r\n\u00a0<\/li>\r\nThis script reads the SCD30 data and updates the current.txt file that the Website sees and also writes the data to a daily file in the data_folder.<\/li>\r\n<\/ul>\r\n\r\n\u00a0<\/li>\r\nThis will run the scd30.py every minute and update the “current.txt” file, which uploaded to the web page.<\/li>\r\n<\/ul>\r\n<\/li>\r\n\r\nCreate a crontab job<\/strong><\/p>\r\n\r\nA cron job is an automated program developed for Unix and Linux systems. It allows the user to execute several commands at a specific time on a precise date.<\/li>\r\nWe need to run the python script scd30.py every minute. To do that, we use the command crontab.<\/li>\r\n“crontab \u2013l” (that is, lowercase L” lists what is in the file, and crontab \u2013e lets us edit or add new jobs.<\/li>\r\nType\u00a0 crontab \u2013e<\/li>\r\nIt now asks what editor to use.<\/li>\r\n\/bin\/nano works much like note pad.<\/li>\r\nvim is used mostly by gurus.<\/li>\r\ned is an ancient editor.<\/li>\r\nIf new to Unix, use nano.<\/li>\r\nAdd this line to the bottom of the file:\r\n\r\n* * * * * python3 \/home\/pi\/scd30.py<\/li>\r\n* * * * * python3 \/home\/pi\/readCSV.py > \/home\/pi\/CSV.log<\/li>\r\n* * * * * python \/home\/pi\/get_co2.py > \/home\/pi\/get_co2.log<\/li>\r\n5 0 * * * python \/home\/pi\/clean_data_folder.py\u00a0 >\u00a0 \/home\/pi\/clean.log<\/li>\r\n<\/ul>\r\n<\/li>\r\nThis will run these programs at a scheduletime.<\/li>\r\nsee Crontab.guru – The cron schedule expression editor<\/a> for corn details.<\/li>\r\n<\/ul>\r\nNotes<\/strong><\/p>\r\n\r\nThe “current.txt” file is just an HTML file the is updated by the program scd30.py<\/li>\r\nThe data files in the directory “data_folder” and are created at the first run after midnight. The files names contain the date it was created. They are CSV files that can be open in excel.<\/li>\r\ni2cdetect -y 1\u00a0 use this command to test that the monitor and the sense are working. This is what you should see. 3c is the monitor and 61 is the scd30 sensro.<\/li>\r\n<\/ul>\r\n\n \t\t\t\n\t\t\t \n \n \n\t\t\t \n\t\t\t \n\t\t\t \n\t\t\t\t\t\n\t\t\t \n\t\t\t \n\t\t\t <\/div>\n\t\t\t<\/form>\r\n <\/p>\r\n<\/li>\r\n<\/ul>\r\n <\/p>\r\n<\/div>","protected":false},"excerpt":{"rendered":"DIY Make CO2\u00a0Sensor please review what you need to do for setting up the scd30 sensor Raspberry pi OS The following instructions are for both the Raspberry pi zero and 3B Download the Latest PI OS from https:\/\/www.raspberrypi.org\/software\/ Use your …<\/span> Continue reading →<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"open","ping_status":"closed","template":"","meta":{"_coblocks_attr":"","_coblocks_dimensions":"","_coblocks_responsive_height":"","_coblocks_accordion_ie_support":""},"_links":{"self":[{"href":"https:\/\/www.larry4u.com\/co2diy.com\/wp-json\/wp\/v2\/pages\/21"}],"collection":[{"href":"https:\/\/www.larry4u.com\/co2diy.com\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/www.larry4u.com\/co2diy.com\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/www.larry4u.com\/co2diy.com\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.larry4u.com\/co2diy.com\/wp-json\/wp\/v2\/comments?post=21"}],"version-history":[{"count":67,"href":"https:\/\/www.larry4u.com\/co2diy.com\/wp-json\/wp\/v2\/pages\/21\/revisions"}],"predecessor-version":[{"id":568,"href":"https:\/\/www.larry4u.com\/co2diy.com\/wp-json\/wp\/v2\/pages\/21\/revisions\/568"}],"wp:attachment":[{"href":"https:\/\/www.larry4u.com\/co2diy.com\/wp-json\/wp\/v2\/media?parent=21"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}
sudo reboot from the xterm<\/p>\r\n
run with \u201cpython3 testplot.py\u201d<\/p>\r\n
This will create a png file. Duble click on it from the remoter ssh file manger and you see the following graph.<\/p>\r\n
<\/p>\r\n
Connecting the SCD30 Hardware<\/strong><\/p>\r\n\r\nBreak off 4 of the male-to-male pins<\/li>\r\nPut on the first four pinholes of the SCD30 and solder.<\/li>\r\n<\/li>\r\n<\/ul>\r\nSCD30 connection<\/strong><\/p>\r\n\r\nVDD 3v3 Power pin 1<\/li>\r\nGND Ground pin 6<\/li>\r\nTX\/SCL I2CL SDA pin 5<\/li>\r\nRX\/SDA I2C SDA pin 3<\/li>\r\nPINs as per the chart<\/li>\r\n<\/ul>\r\n <\/p>\r\n <\/p>\r\nSteps to read data from SCD30<\/strong><\/p>\r\n<\/li>\r\n\r\n <\/p>\r\n\r\nfallow instructions from GitHub – paulvha\/scd30_on_raspberry: Program to set and read SCD30 on a raspberry Pi<\/a><\/li>\r\nTo test if the pi sees the sensor works, run the example.py file you copy to \/home\/pi directory.<\/li>\r\nIn your SSH terminal at the pi home directory, type:<\/li>\r\npython3 -m pip install scd30_i2c<\/li>\r\nPython3 example.py<\/li>\r\n<\/ul>\r\n\r\nIf you see this, the wiring is right.<\/li>\r\n<\/ul>\r\nWrite data to the monitor.<\/strong><\/p>\r\n\r\nCreate a folder \u201cdata_folder\u201d with the following command:<\/li>\r\n<\/ul>\r\n\r\n\r\n\r\n\r\n\r\nIn the SSH terminal, type at the pi home directory:\r\n\r\nmkdir data_folder<\/li>\r\n<\/ul>\r\n<\/li>\r\n<\/ul>\r\n<\/li>\r\n<\/ul>\r\n<\/li>\r\n<\/ul>\r\n\r\nRun the script scd30.py that you put in the pi directory.\r\n\r\nfrom SSH type “python3 scd30.py”<\/li>\r\n<\/ul>\r\n<\/li>\r\n\u00a0<\/li>\r\nThis script reads the SCD30 data and updates the current.txt file that the Website sees and also writes the data to a daily file in the data_folder.<\/li>\r\n<\/ul>\r\n\r\n\u00a0<\/li>\r\nThis will run the scd30.py every minute and update the “current.txt” file, which uploaded to the web page.<\/li>\r\n<\/ul>\r\n<\/li>\r\n\r\nCreate a crontab job<\/strong><\/p>\r\n\r\nA cron job is an automated program developed for Unix and Linux systems. It allows the user to execute several commands at a specific time on a precise date.<\/li>\r\nWe need to run the python script scd30.py every minute. To do that, we use the command crontab.<\/li>\r\n“crontab \u2013l” (that is, lowercase L” lists what is in the file, and crontab \u2013e lets us edit or add new jobs.<\/li>\r\nType\u00a0 crontab \u2013e<\/li>\r\nIt now asks what editor to use.<\/li>\r\n\/bin\/nano works much like note pad.<\/li>\r\nvim is used mostly by gurus.<\/li>\r\ned is an ancient editor.<\/li>\r\nIf new to Unix, use nano.<\/li>\r\nAdd this line to the bottom of the file:\r\n\r\n* * * * * python3 \/home\/pi\/scd30.py<\/li>\r\n* * * * * python3 \/home\/pi\/readCSV.py > \/home\/pi\/CSV.log<\/li>\r\n* * * * * python \/home\/pi\/get_co2.py > \/home\/pi\/get_co2.log<\/li>\r\n5 0 * * * python \/home\/pi\/clean_data_folder.py\u00a0 >\u00a0 \/home\/pi\/clean.log<\/li>\r\n<\/ul>\r\n<\/li>\r\nThis will run these programs at a scheduletime.<\/li>\r\nsee Crontab.guru – The cron schedule expression editor<\/a> for corn details.<\/li>\r\n<\/ul>\r\nNotes<\/strong><\/p>\r\n\r\nThe “current.txt” file is just an HTML file the is updated by the program scd30.py<\/li>\r\nThe data files in the directory “data_folder” and are created at the first run after midnight. The files names contain the date it was created. They are CSV files that can be open in excel.<\/li>\r\ni2cdetect -y 1\u00a0 use this command to test that the monitor and the sense are working. This is what you should see. 3c is the monitor and 61 is the scd30 sensro.<\/li>\r\n<\/ul>\r\n\n \t\t\t\n\t\t\t \n \n \n\t\t\t \n\t\t\t \n\t\t\t \n\t\t\t\t\t\n\t\t\t \n\t\t\t \n\t\t\t <\/div>\n\t\t\t<\/form>\r\n <\/p>\r\n<\/li>\r\n<\/ul>\r\n <\/p>\r\n<\/div>","protected":false},"excerpt":{"rendered":"DIY Make CO2\u00a0Sensor please review what you need to do for setting up the scd30 sensor Raspberry pi OS The following instructions are for both the Raspberry pi zero and 3B Download the Latest PI OS from https:\/\/www.raspberrypi.org\/software\/ Use your …<\/span> Continue reading →<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"open","ping_status":"closed","template":"","meta":{"_coblocks_attr":"","_coblocks_dimensions":"","_coblocks_responsive_height":"","_coblocks_accordion_ie_support":""},"_links":{"self":[{"href":"https:\/\/www.larry4u.com\/co2diy.com\/wp-json\/wp\/v2\/pages\/21"}],"collection":[{"href":"https:\/\/www.larry4u.com\/co2diy.com\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/www.larry4u.com\/co2diy.com\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/www.larry4u.com\/co2diy.com\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.larry4u.com\/co2diy.com\/wp-json\/wp\/v2\/comments?post=21"}],"version-history":[{"count":67,"href":"https:\/\/www.larry4u.com\/co2diy.com\/wp-json\/wp\/v2\/pages\/21\/revisions"}],"predecessor-version":[{"id":568,"href":"https:\/\/www.larry4u.com\/co2diy.com\/wp-json\/wp\/v2\/pages\/21\/revisions\/568"}],"wp:attachment":[{"href":"https:\/\/www.larry4u.com\/co2diy.com\/wp-json\/wp\/v2\/media?parent=21"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}
SCD30 connection<\/strong><\/p>\r\n\r\nVDD 3v3 Power pin 1<\/li>\r\nGND Ground pin 6<\/li>\r\nTX\/SCL I2CL SDA pin 5<\/li>\r\nRX\/SDA I2C SDA pin 3<\/li>\r\nPINs as per the chart<\/li>\r\n<\/ul>\r\n <\/p>\r\n <\/p>\r\nSteps to read data from SCD30<\/strong><\/p>\r\n<\/li>\r\n\r\n <\/p>\r\n\r\nfallow instructions from GitHub – paulvha\/scd30_on_raspberry: Program to set and read SCD30 on a raspberry Pi<\/a><\/li>\r\nTo test if the pi sees the sensor works, run the example.py file you copy to \/home\/pi directory.<\/li>\r\nIn your SSH terminal at the pi home directory, type:<\/li>\r\npython3 -m pip install scd30_i2c<\/li>\r\nPython3 example.py<\/li>\r\n<\/ul>\r\n\r\nIf you see this, the wiring is right.<\/li>\r\n<\/ul>\r\nWrite data to the monitor.<\/strong><\/p>\r\n\r\nCreate a folder \u201cdata_folder\u201d with the following command:<\/li>\r\n<\/ul>\r\n\r\n\r\n\r\n\r\n\r\nIn the SSH terminal, type at the pi home directory:\r\n\r\nmkdir data_folder<\/li>\r\n<\/ul>\r\n<\/li>\r\n<\/ul>\r\n<\/li>\r\n<\/ul>\r\n<\/li>\r\n<\/ul>\r\n\r\nRun the script scd30.py that you put in the pi directory.\r\n\r\nfrom SSH type “python3 scd30.py”<\/li>\r\n<\/ul>\r\n<\/li>\r\n\u00a0<\/li>\r\nThis script reads the SCD30 data and updates the current.txt file that the Website sees and also writes the data to a daily file in the data_folder.<\/li>\r\n<\/ul>\r\n\r\n\u00a0<\/li>\r\nThis will run the scd30.py every minute and update the “current.txt” file, which uploaded to the web page.<\/li>\r\n<\/ul>\r\n<\/li>\r\n\r\nCreate a crontab job<\/strong><\/p>\r\n\r\nA cron job is an automated program developed for Unix and Linux systems. It allows the user to execute several commands at a specific time on a precise date.<\/li>\r\nWe need to run the python script scd30.py every minute. To do that, we use the command crontab.<\/li>\r\n“crontab \u2013l” (that is, lowercase L” lists what is in the file, and crontab \u2013e lets us edit or add new jobs.<\/li>\r\nType\u00a0 crontab \u2013e<\/li>\r\nIt now asks what editor to use.<\/li>\r\n\/bin\/nano works much like note pad.<\/li>\r\nvim is used mostly by gurus.<\/li>\r\ned is an ancient editor.<\/li>\r\nIf new to Unix, use nano.<\/li>\r\nAdd this line to the bottom of the file:\r\n\r\n* * * * * python3 \/home\/pi\/scd30.py<\/li>\r\n* * * * * python3 \/home\/pi\/readCSV.py > \/home\/pi\/CSV.log<\/li>\r\n* * * * * python \/home\/pi\/get_co2.py > \/home\/pi\/get_co2.log<\/li>\r\n5 0 * * * python \/home\/pi\/clean_data_folder.py\u00a0 >\u00a0 \/home\/pi\/clean.log<\/li>\r\n<\/ul>\r\n<\/li>\r\nThis will run these programs at a scheduletime.<\/li>\r\nsee Crontab.guru – The cron schedule expression editor<\/a> for corn details.<\/li>\r\n<\/ul>\r\nNotes<\/strong><\/p>\r\n\r\nThe “current.txt” file is just an HTML file the is updated by the program scd30.py<\/li>\r\nThe data files in the directory “data_folder” and are created at the first run after midnight. The files names contain the date it was created. They are CSV files that can be open in excel.<\/li>\r\ni2cdetect -y 1\u00a0 use this command to test that the monitor and the sense are working. This is what you should see. 3c is the monitor and 61 is the scd30 sensro.<\/li>\r\n<\/ul>\r\n\n \t\t\t\n\t\t\t \n \n \n\t\t\t \n\t\t\t \n\t\t\t \n\t\t\t\t\t\n\t\t\t \n\t\t\t \n\t\t\t <\/div>\n\t\t\t<\/form>\r\n <\/p>\r\n<\/li>\r\n<\/ul>\r\n <\/p>\r\n<\/div>","protected":false},"excerpt":{"rendered":"DIY Make CO2\u00a0Sensor please review what you need to do for setting up the scd30 sensor Raspberry pi OS The following instructions are for both the Raspberry pi zero and 3B Download the Latest PI OS from https:\/\/www.raspberrypi.org\/software\/ Use your …<\/span> Continue reading →<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"open","ping_status":"closed","template":"","meta":{"_coblocks_attr":"","_coblocks_dimensions":"","_coblocks_responsive_height":"","_coblocks_accordion_ie_support":""},"_links":{"self":[{"href":"https:\/\/www.larry4u.com\/co2diy.com\/wp-json\/wp\/v2\/pages\/21"}],"collection":[{"href":"https:\/\/www.larry4u.com\/co2diy.com\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/www.larry4u.com\/co2diy.com\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/www.larry4u.com\/co2diy.com\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.larry4u.com\/co2diy.com\/wp-json\/wp\/v2\/comments?post=21"}],"version-history":[{"count":67,"href":"https:\/\/www.larry4u.com\/co2diy.com\/wp-json\/wp\/v2\/pages\/21\/revisions"}],"predecessor-version":[{"id":568,"href":"https:\/\/www.larry4u.com\/co2diy.com\/wp-json\/wp\/v2\/pages\/21\/revisions\/568"}],"wp:attachment":[{"href":"https:\/\/www.larry4u.com\/co2diy.com\/wp-json\/wp\/v2\/media?parent=21"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}
Steps to read data from SCD30<\/strong><\/p>\r\n<\/li>\r\n\r\n <\/p>\r\n\r\nfallow instructions from GitHub – paulvha\/scd30_on_raspberry: Program to set and read SCD30 on a raspberry Pi<\/a><\/li>\r\nTo test if the pi sees the sensor works, run the example.py file you copy to \/home\/pi directory.<\/li>\r\nIn your SSH terminal at the pi home directory, type:<\/li>\r\npython3 -m pip install scd30_i2c<\/li>\r\nPython3 example.py<\/li>\r\n<\/ul>\r\n\r\nIf you see this, the wiring is right.<\/li>\r\n<\/ul>\r\nWrite data to the monitor.<\/strong><\/p>\r\n\r\nCreate a folder \u201cdata_folder\u201d with the following command:<\/li>\r\n<\/ul>\r\n\r\n\r\n\r\n\r\n\r\nIn the SSH terminal, type at the pi home directory:\r\n\r\nmkdir data_folder<\/li>\r\n<\/ul>\r\n<\/li>\r\n<\/ul>\r\n<\/li>\r\n<\/ul>\r\n<\/li>\r\n<\/ul>\r\n\r\nRun the script scd30.py that you put in the pi directory.\r\n\r\nfrom SSH type “python3 scd30.py”<\/li>\r\n<\/ul>\r\n<\/li>\r\n\u00a0<\/li>\r\nThis script reads the SCD30 data and updates the current.txt file that the Website sees and also writes the data to a daily file in the data_folder.<\/li>\r\n<\/ul>\r\n\r\n\u00a0<\/li>\r\nThis will run the scd30.py every minute and update the “current.txt” file, which uploaded to the web page.<\/li>\r\n<\/ul>\r\n<\/li>\r\n\r\nCreate a crontab job<\/strong><\/p>\r\n\r\nA cron job is an automated program developed for Unix and Linux systems. It allows the user to execute several commands at a specific time on a precise date.<\/li>\r\nWe need to run the python script scd30.py every minute. To do that, we use the command crontab.<\/li>\r\n“crontab \u2013l” (that is, lowercase L” lists what is in the file, and crontab \u2013e lets us edit or add new jobs.<\/li>\r\nType\u00a0 crontab \u2013e<\/li>\r\nIt now asks what editor to use.<\/li>\r\n\/bin\/nano works much like note pad.<\/li>\r\nvim is used mostly by gurus.<\/li>\r\ned is an ancient editor.<\/li>\r\nIf new to Unix, use nano.<\/li>\r\nAdd this line to the bottom of the file:\r\n\r\n* * * * * python3 \/home\/pi\/scd30.py<\/li>\r\n* * * * * python3 \/home\/pi\/readCSV.py > \/home\/pi\/CSV.log<\/li>\r\n* * * * * python \/home\/pi\/get_co2.py > \/home\/pi\/get_co2.log<\/li>\r\n5 0 * * * python \/home\/pi\/clean_data_folder.py\u00a0 >\u00a0 \/home\/pi\/clean.log<\/li>\r\n<\/ul>\r\n<\/li>\r\nThis will run these programs at a scheduletime.<\/li>\r\nsee Crontab.guru – The cron schedule expression editor<\/a> for corn details.<\/li>\r\n<\/ul>\r\nNotes<\/strong><\/p>\r\n\r\nThe “current.txt” file is just an HTML file the is updated by the program scd30.py<\/li>\r\nThe data files in the directory “data_folder” and are created at the first run after midnight. The files names contain the date it was created. They are CSV files that can be open in excel.<\/li>\r\ni2cdetect -y 1\u00a0 use this command to test that the monitor and the sense are working. This is what you should see. 3c is the monitor and 61 is the scd30 sensro.<\/li>\r\n<\/ul>\r\n\n \t\t\t\n\t\t\t \n \n \n\t\t\t \n\t\t\t \n\t\t\t \n\t\t\t\t\t\n\t\t\t \n\t\t\t \n\t\t\t <\/div>\n\t\t\t<\/form>\r\n <\/p>\r\n<\/li>\r\n<\/ul>\r\n <\/p>\r\n<\/div>","protected":false},"excerpt":{"rendered":"DIY Make CO2\u00a0Sensor please review what you need to do for setting up the scd30 sensor Raspberry pi OS The following instructions are for both the Raspberry pi zero and 3B Download the Latest PI OS from https:\/\/www.raspberrypi.org\/software\/ Use your …<\/span> Continue reading →<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"open","ping_status":"closed","template":"","meta":{"_coblocks_attr":"","_coblocks_dimensions":"","_coblocks_responsive_height":"","_coblocks_accordion_ie_support":""},"_links":{"self":[{"href":"https:\/\/www.larry4u.com\/co2diy.com\/wp-json\/wp\/v2\/pages\/21"}],"collection":[{"href":"https:\/\/www.larry4u.com\/co2diy.com\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/www.larry4u.com\/co2diy.com\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/www.larry4u.com\/co2diy.com\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.larry4u.com\/co2diy.com\/wp-json\/wp\/v2\/comments?post=21"}],"version-history":[{"count":67,"href":"https:\/\/www.larry4u.com\/co2diy.com\/wp-json\/wp\/v2\/pages\/21\/revisions"}],"predecessor-version":[{"id":568,"href":"https:\/\/www.larry4u.com\/co2diy.com\/wp-json\/wp\/v2\/pages\/21\/revisions\/568"}],"wp:attachment":[{"href":"https:\/\/www.larry4u.com\/co2diy.com\/wp-json\/wp\/v2\/media?parent=21"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}
Write data to the monitor.<\/strong><\/p>\r\n\r\nCreate a folder \u201cdata_folder\u201d with the following command:<\/li>\r\n<\/ul>\r\n\r\n\r\n\r\n\r\n\r\nIn the SSH terminal, type at the pi home directory:\r\n\r\nmkdir data_folder<\/li>\r\n<\/ul>\r\n<\/li>\r\n<\/ul>\r\n<\/li>\r\n<\/ul>\r\n<\/li>\r\n<\/ul>\r\n\r\nRun the script scd30.py that you put in the pi directory.\r\n\r\nfrom SSH type “python3 scd30.py”<\/li>\r\n<\/ul>\r\n<\/li>\r\n\u00a0<\/li>\r\nThis script reads the SCD30 data and updates the current.txt file that the Website sees and also writes the data to a daily file in the data_folder.<\/li>\r\n<\/ul>\r\n\r\n\u00a0<\/li>\r\nThis will run the scd30.py every minute and update the “current.txt” file, which uploaded to the web page.<\/li>\r\n<\/ul>\r\n<\/li>\r\n\r\nCreate a crontab job<\/strong><\/p>\r\n\r\nA cron job is an automated program developed for Unix and Linux systems. It allows the user to execute several commands at a specific time on a precise date.<\/li>\r\nWe need to run the python script scd30.py every minute. To do that, we use the command crontab.<\/li>\r\n“crontab \u2013l” (that is, lowercase L” lists what is in the file, and crontab \u2013e lets us edit or add new jobs.<\/li>\r\nType\u00a0 crontab \u2013e<\/li>\r\nIt now asks what editor to use.<\/li>\r\n\/bin\/nano works much like note pad.<\/li>\r\nvim is used mostly by gurus.<\/li>\r\ned is an ancient editor.<\/li>\r\nIf new to Unix, use nano.<\/li>\r\nAdd this line to the bottom of the file:\r\n\r\n* * * * * python3 \/home\/pi\/scd30.py<\/li>\r\n* * * * * python3 \/home\/pi\/readCSV.py > \/home\/pi\/CSV.log<\/li>\r\n* * * * * python \/home\/pi\/get_co2.py > \/home\/pi\/get_co2.log<\/li>\r\n5 0 * * * python \/home\/pi\/clean_data_folder.py\u00a0 >\u00a0 \/home\/pi\/clean.log<\/li>\r\n<\/ul>\r\n<\/li>\r\nThis will run these programs at a scheduletime.<\/li>\r\nsee Crontab.guru – The cron schedule expression editor<\/a> for corn details.<\/li>\r\n<\/ul>\r\nNotes<\/strong><\/p>\r\n\r\nThe “current.txt” file is just an HTML file the is updated by the program scd30.py<\/li>\r\nThe data files in the directory “data_folder” and are created at the first run after midnight. The files names contain the date it was created. They are CSV files that can be open in excel.<\/li>\r\ni2cdetect -y 1\u00a0 use this command to test that the monitor and the sense are working. This is what you should see. 3c is the monitor and 61 is the scd30 sensro.<\/li>\r\n<\/ul>\r\n\n \t\t\t\n\t\t\t \n \n \n\t\t\t \n\t\t\t \n\t\t\t \n\t\t\t\t\t\n\t\t\t \n\t\t\t \n\t\t\t <\/div>\n\t\t\t<\/form>\r\n <\/p>\r\n<\/li>\r\n<\/ul>\r\n <\/p>\r\n<\/div>","protected":false},"excerpt":{"rendered":"DIY Make CO2\u00a0Sensor please review what you need to do for setting up the scd30 sensor Raspberry pi OS The following instructions are for both the Raspberry pi zero and 3B Download the Latest PI OS from https:\/\/www.raspberrypi.org\/software\/ Use your …<\/span> Continue reading →<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"open","ping_status":"closed","template":"","meta":{"_coblocks_attr":"","_coblocks_dimensions":"","_coblocks_responsive_height":"","_coblocks_accordion_ie_support":""},"_links":{"self":[{"href":"https:\/\/www.larry4u.com\/co2diy.com\/wp-json\/wp\/v2\/pages\/21"}],"collection":[{"href":"https:\/\/www.larry4u.com\/co2diy.com\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/www.larry4u.com\/co2diy.com\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/www.larry4u.com\/co2diy.com\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.larry4u.com\/co2diy.com\/wp-json\/wp\/v2\/comments?post=21"}],"version-history":[{"count":67,"href":"https:\/\/www.larry4u.com\/co2diy.com\/wp-json\/wp\/v2\/pages\/21\/revisions"}],"predecessor-version":[{"id":568,"href":"https:\/\/www.larry4u.com\/co2diy.com\/wp-json\/wp\/v2\/pages\/21\/revisions\/568"}],"wp:attachment":[{"href":"https:\/\/www.larry4u.com\/co2diy.com\/wp-json\/wp\/v2\/media?parent=21"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}
Create a crontab job<\/strong><\/p>\r\n\r\nA cron job is an automated program developed for Unix and Linux systems. It allows the user to execute several commands at a specific time on a precise date.<\/li>\r\nWe need to run the python script scd30.py every minute. To do that, we use the command crontab.<\/li>\r\n“crontab \u2013l” (that is, lowercase L” lists what is in the file, and crontab \u2013e lets us edit or add new jobs.<\/li>\r\nType\u00a0 crontab \u2013e<\/li>\r\nIt now asks what editor to use.<\/li>\r\n\/bin\/nano works much like note pad.<\/li>\r\nvim is used mostly by gurus.<\/li>\r\ned is an ancient editor.<\/li>\r\nIf new to Unix, use nano.<\/li>\r\nAdd this line to the bottom of the file:\r\n\r\n* * * * * python3 \/home\/pi\/scd30.py<\/li>\r\n* * * * * python3 \/home\/pi\/readCSV.py > \/home\/pi\/CSV.log<\/li>\r\n* * * * * python \/home\/pi\/get_co2.py > \/home\/pi\/get_co2.log<\/li>\r\n5 0 * * * python \/home\/pi\/clean_data_folder.py\u00a0 >\u00a0 \/home\/pi\/clean.log<\/li>\r\n<\/ul>\r\n<\/li>\r\nThis will run these programs at a scheduletime.<\/li>\r\nsee Crontab.guru – The cron schedule expression editor<\/a> for corn details.<\/li>\r\n<\/ul>\r\nNotes<\/strong><\/p>\r\n\r\nThe “current.txt” file is just an HTML file the is updated by the program scd30.py<\/li>\r\nThe data files in the directory “data_folder” and are created at the first run after midnight. The files names contain the date it was created. They are CSV files that can be open in excel.<\/li>\r\ni2cdetect -y 1\u00a0 use this command to test that the monitor and the sense are working. This is what you should see. 3c is the monitor and 61 is the scd30 sensro.<\/li>\r\n<\/ul>\r\n\n \t\t\t\n\t\t\t \n \n \n\t\t\t \n\t\t\t \n\t\t\t \n\t\t\t\t\t\n\t\t\t \n\t\t\t \n\t\t\t <\/div>\n\t\t\t<\/form>\r\n <\/p>\r\n<\/li>\r\n<\/ul>\r\n <\/p>\r\n<\/div>","protected":false},"excerpt":{"rendered":"DIY Make CO2\u00a0Sensor please review what you need to do for setting up the scd30 sensor Raspberry pi OS The following instructions are for both the Raspberry pi zero and 3B Download the Latest PI OS from https:\/\/www.raspberrypi.org\/software\/ Use your …<\/span> Continue reading →<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"open","ping_status":"closed","template":"","meta":{"_coblocks_attr":"","_coblocks_dimensions":"","_coblocks_responsive_height":"","_coblocks_accordion_ie_support":""},"_links":{"self":[{"href":"https:\/\/www.larry4u.com\/co2diy.com\/wp-json\/wp\/v2\/pages\/21"}],"collection":[{"href":"https:\/\/www.larry4u.com\/co2diy.com\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/www.larry4u.com\/co2diy.com\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/www.larry4u.com\/co2diy.com\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.larry4u.com\/co2diy.com\/wp-json\/wp\/v2\/comments?post=21"}],"version-history":[{"count":67,"href":"https:\/\/www.larry4u.com\/co2diy.com\/wp-json\/wp\/v2\/pages\/21\/revisions"}],"predecessor-version":[{"id":568,"href":"https:\/\/www.larry4u.com\/co2diy.com\/wp-json\/wp\/v2\/pages\/21\/revisions\/568"}],"wp:attachment":[{"href":"https:\/\/www.larry4u.com\/co2diy.com\/wp-json\/wp\/v2\/media?parent=21"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}
Notes<\/strong><\/p>\r\n\r\nThe “current.txt” file is just an HTML file the is updated by the program scd30.py<\/li>\r\nThe data files in the directory “data_folder” and are created at the first run after midnight. The files names contain the date it was created. They are CSV files that can be open in excel.<\/li>\r\ni2cdetect -y 1\u00a0 use this command to test that the monitor and the sense are working. This is what you should see. 3c is the monitor and 61 is the scd30 sensro.<\/li>\r\n<\/ul>\r\n\n \t\t\t\n\t\t\t \n \n \n\t\t\t \n\t\t\t \n\t\t\t \n\t\t\t\t\t\n\t\t\t \n\t\t\t \n\t\t\t <\/div>\n\t\t\t<\/form>\r\n <\/p>\r\n<\/li>\r\n<\/ul>\r\n <\/p>\r\n<\/div>","protected":false},"excerpt":{"rendered":"DIY Make CO2\u00a0Sensor please review what you need to do for setting up the scd30 sensor Raspberry pi OS The following instructions are for both the Raspberry pi zero and 3B Download the Latest PI OS from https:\/\/www.raspberrypi.org\/software\/ Use your …<\/span> Continue reading →<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"open","ping_status":"closed","template":"","meta":{"_coblocks_attr":"","_coblocks_dimensions":"","_coblocks_responsive_height":"","_coblocks_accordion_ie_support":""},"_links":{"self":[{"href":"https:\/\/www.larry4u.com\/co2diy.com\/wp-json\/wp\/v2\/pages\/21"}],"collection":[{"href":"https:\/\/www.larry4u.com\/co2diy.com\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/www.larry4u.com\/co2diy.com\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/www.larry4u.com\/co2diy.com\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.larry4u.com\/co2diy.com\/wp-json\/wp\/v2\/comments?post=21"}],"version-history":[{"count":67,"href":"https:\/\/www.larry4u.com\/co2diy.com\/wp-json\/wp\/v2\/pages\/21\/revisions"}],"predecessor-version":[{"id":568,"href":"https:\/\/www.larry4u.com\/co2diy.com\/wp-json\/wp\/v2\/pages\/21\/revisions\/568"}],"wp:attachment":[{"href":"https:\/\/www.larry4u.com\/co2diy.com\/wp-json\/wp\/v2\/media?parent=21"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}
<\/p>\r\n<\/li>\r\n<\/ul>\r\n
<\/p>\r\n<\/div>","protected":false},"excerpt":{"rendered":"
DIY Make CO2\u00a0Sensor please review what you need to do for setting up the scd30 sensor Raspberry pi OS The following instructions are for both the Raspberry pi zero and 3B Download the Latest PI OS from https:\/\/www.raspberrypi.org\/software\/ Use your …<\/span> Continue reading →<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"open","ping_status":"closed","template":"","meta":{"_coblocks_attr":"","_coblocks_dimensions":"","_coblocks_responsive_height":"","_coblocks_accordion_ie_support":""},"_links":{"self":[{"href":"https:\/\/www.larry4u.com\/co2diy.com\/wp-json\/wp\/v2\/pages\/21"}],"collection":[{"href":"https:\/\/www.larry4u.com\/co2diy.com\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/www.larry4u.com\/co2diy.com\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/www.larry4u.com\/co2diy.com\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.larry4u.com\/co2diy.com\/wp-json\/wp\/v2\/comments?post=21"}],"version-history":[{"count":67,"href":"https:\/\/www.larry4u.com\/co2diy.com\/wp-json\/wp\/v2\/pages\/21\/revisions"}],"predecessor-version":[{"id":568,"href":"https:\/\/www.larry4u.com\/co2diy.com\/wp-json\/wp\/v2\/pages\/21\/revisions\/568"}],"wp:attachment":[{"href":"https:\/\/www.larry4u.com\/co2diy.com\/wp-json\/wp\/v2\/media?parent=21"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}
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<\/li>\r\n