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Adding GPIO

Q&A Forum › Category: ESP32 › Adding GPIO
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Brian asked 5 years ago

Two questions:
1st is it possible to add additional i/o on an ESP32-CAM module by soldering onto the esp32-s pins that isn’t used / connected to the header pins?
2nd  has anyone used a Microchip expansion chip (MCP23016 or MCP23S17) on this module while retaining all of the original functionality of the ESP32-CAM?

Question Tags: ESP32-Cam, GPIO
2 Answers
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Sara Santos Staff answered 5 years ago

Hi Brian.

  1. I haven’t tried it, but it should be possible to use additional GPIOs from the ESP32-S chip as long as those pins aren’t being used by the camera.
  2. I think you should be able to use the expansion chip without any problems. However, I’m not sure what would be the best GPIO to connect it to. I think you’ll have to experiment to figure out.

Regards,
Sara
 

0 Vote Up Vote Down
Steve Mercer answered 5 years ago

My question would be: What are you trying to accomplish? Could you use the I2C bus with a multiplexer instead?

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