diff --git a/README.md b/README.md index ca8c9bc..bbb48cb 100644 --- a/README.md +++ b/README.md @@ -99,13 +99,13 @@ URLs: GPIO PINS:
13 free (used by sd card but free if using 1 bit mode)
12 free (must be low at boot, used by sd card but free if using 1 bit mode) -
14 used by sd card (useable is SPI clock?) -
2 used by sd card (useabke as SPI MISO?) -
15 used by sd card (might be usable as SPI CS??) +
14 used by sd card (usable is SPI clock?) +
2 used by sd card (usable as SPI MISO?) +
15 used by sd card as CS
1 serial - output only?
3 serial - input only?
4 has the illumination/flash led on it - led could be removed and use as output? -
33 onboard led - possibly remove led and use as gpio? +
33 onboard led - use as output? Some great info here: https://github.com/raphaelbs/esp32-cam-ai-thinker/blob/master/docs/esp32cam-pin-notes.md BTW-You can use an MCP23017 io expander chip on pins 12 and 13 to give you 16 general purpose gpio pins, this requires the adafruit MCP23017 library to be installed.