RDL 4-20ma module with Raspberry pi

RDL 4-20ma module with Raspberry pi

Step1: Initially do all I2C settings in raspberry pi and check address where module is connected

Command: I2cdetect –y 1

By default ADS115 is detected in address48

Step2: Install Adafruit ads1115 library in raspberry pi

Commands:

1.     sudo apt-get install build-essential python-dev python-smbus git

2.     cd ~

3.     git clone https://github.com/adafruit/Adafruit_Python_ADS1x15.git

4.     cd Adafruit_Python_ADS1x15

5.     sudo python setup.py install

Step3: Next installing python packages for asd1115

Commands:

1.     sudo apt-get install build-essential python-dev python-smbus python-pip

2.     sudo pip install adafruit-ads1x15

Step4: Executing simple example program

1.     cd ~/Adafruit_Python_ADS1x15/examples

2.     nano simpletest.py   // This program reads vales from all the channels

3.     sudo python simpletest.py  // this command runs the code

We can observe that raspberry pi reading values from each channel

Now connecting potentiometer to one of the channel and reading values