ESP8266 Community Forum

- Tue Jan 02, 2018 1:58 pm #72832 i have used the i2c bus pin 4,5 and I have used the spi bus PINS 12,13,14,15. What other pins can be used without interfering with something else? If I do not use the sleep function is pin 16 available. What other pins might be available.
Thanks
Sprinkfitter

- Tue Jan 02, 2018 6:42 pm #72840 I always use 0 as SDA and 2 as SCL. Normal operation requires them to be high. But after reset they are available. That way I have 4 and 5 still for other uses.