Preparing the Raspberry Pi

Install the latest Raspberry Pi OS

Follow the instructions on this page to get Raspberry Pi OS running https://www.raspberrypi.org/downloads/raspberry-pi-os/

Update and Upgrade Packages

sudo apt-get update
sudo apt-get upgrade

install Python 3

Use PI menu \[preference]\[Add / remove software] and install IDLE

install pip and wheel

   sudo apt-get install python3-pip

install temperature /humidity sensor

   sudo pip3 install Adafruit_DHT

Download sample code.

cd ~
git clone https://github.com/nysbc/SEMCf

to autostart TemHum.py software

   sudo crontab -e
   Add:

@reboot sudo python /home/pi/temhum/temhum.py >/home/pi/logs/cronlog.txt

I2C MODE ? communication protocol used for the pH sensor

Enable I2C bus on the Raspberry Pi

Enable I2C bus on the Raspberry Pi by following this:

https://learn.adafruit.com/adafruits-raspberry-pi-lesson-4-gpio-setup/configuring-i2c

You can confirm that the setup worked and sensors are present with sudo i2cdetect -y 1

Test Sensor

Run the sample code below:

cd ~/Raspberry-Pi-sample-code
sudo python i2c.py

When the code starts up a list of commands will be shown.

For more details on the commands & responses, please refer to the Datasheets of the Atlas Scientific Sensors.