Trouble Coding for Mulitple I2C devices with TCA9548A Multiplexer

Projects General Guidance
1

Hi,

I have multiple Adafruit STEMMA Soil Capacitance Soil Moisture Sensors that use an I2C connection, and as they have the same address and I want to use multiple sensors, I bought the multiplexer to address each sensor individually.

I understand the premise of using the "tcaselect(t)" function to call which port is being read, but I can't seem to get a working code going to read more than one sensor from the multiplexer.

I am also very new to coding using the arduino, and have mainly been harvesting code from others and trying to modify it to suit the Soil moisture sensor that I have.

If anyone is familiar with the Adafruit_seesaw library and understands what/how to call each sensor so that I can read the data from each sensor, that would be amazing!

Hopefully I've given enough information, cheers!

2

How many sensors do you have. They have the capability to change the i2c address from 0x36 to 0x39 so you can use 4 without any multiplexing.

What multiplexer did you purchase? The seesaw library is not the multiplexer but just a common framework to talk to all the adafruit sensors.

If you purchased their TCA9548A 1-to-8 I2C multiplexer, then Adafruit has a nice tutorial that you should read here