2020-12-13

I had several non-pi boards on a bread board. Connected them to the Pi with coloured wires.

1. 3V3 Brown 
2. 5V Red
3. SDA Orange 
4. 5V Yellow
5. SCL Green
6. GND Blue

Opening a console to run from the command line,

i2cdetect -y 1

detected devices at hex addresses 20 (MCP23017 sixteen-bit PIO), 48 ( ADS1115 ADC), 57 (DS3232 Real-Time Clock) and 68 (MPU6050 accelerometer/gyro).

2020-12-14

Example Python code from https://www.abelectronics.co.uk/kb/article/1094/i2c-part-4---programming-i-c-with-python now talking to the MCP23017 i/o board, blinking a light and reading inputs.

DS3231 real-time clock now successfully integrated into the OS.