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I recently bought a Raspberry Pico to increase the capacities of my oldest Pi3B + tenfold in terms of sensors, buttons, LEDs, GPIO, etc.

But I can not find for the moment any protocol or Bus allowing the two controllers to communicate in both directions ...

Is this possible in MicroPython? Or in C?

Arthur Dodin
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It is unrealistic to expect a "tenfold" increase. There are many ways of communicating with the Pico (all the usual suspects in fact).

You may be interested in Pico as a computer peripheral.

Milliways
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I developed an Instrument which combines the RPI B+ with the PICO to control many circuits and features and capture analog data and process it from the PICO. This is all done with my GUI developed using Python's Tkinter and Matplotlib. This has provided greatly increased capabilities for both. Adafruit has an excellent page on how to incorporate the PICO with your Pi. see the link below. https://learn.adafruit.com/circuitpython-libraries-on-any-computer-with-raspberry-pi-pico?view=all

R Bowles
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