Hello all,ive been using the sketch from random nerd tutorials to basically interface 4 gpio pins that are available for the esp32 cam i would really like to have more pins for cool stuff than just 4,is anyone aware if there are ways i can add multiplexing or any kind of IO expansion to the board? I know that there are alot of pins used by the sd card and the camera itself etc,thanks in advance for any answers
Hi,
I believe the main io pins available for general use are 13 and 12 (12 must not be high at boot). Note: if using sd-card it needs to be in 1-bit mode for this(I understand there may be issues reading files but writing I have tested ok)
14, 2 & 15 should also be available if you are not using the SD Card.
You can also use pins 1 and 3 if you do not use Serial.
You can use a MCP23017 io expander chip on pins 12 and 13 to give you 16 general purpose gpio pins
I have a sketch here which may be handy for experimenting with all this: GitHub - alanesq/esp32cam-demo: esp32cam module demo / shows how you can easily use the esp32cam including reading raw rgb data, streaming, displaying the image etc.(ArduinoIDE or PlatformIO)
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You rock thanks so much!
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