Is there a way to share information between two SparkFun RedBoard Qwiic? Mainly, I want to get information from a sensor connected to one SparkFun RedBoard Qwiic and display its data in a second SparkFun RedBoard Qwiic using micro OLED screen.
Yes, that’s possible but you’re going to need to connect them in a way other than Qwiic. *(see below)
You could connect the two RedBoards via serial or SPI and communicate between them that way. It gets a bit trickier if you want to connect the two RedBoards via Qwiic because one will have to be a master and the other will need to be a slave. The slave won’t have the ability to talk to a Qwiic sensor or a Qwiic display. Serial would be the easiest way to go, only need 2 or 3 wires to work and will work over longer distances than Qwiic.
*Technically you can do this via I2C (Qwiic) but the stock Arduino wire library doesn’t support an Arduino switching between master and slave on the fly. With another library it could be done, but that’s another discussion.