Use this forum to chat about hardware specific topics for the ESP8266 (peripherals, memory, clocks, JTAG, programming)

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By dataguy
#73370 Finally sorted :)

@Ian
After a massive waste of time I tried your suggestion and it worked !!. I cannot understand why it should work OK on a pro mini @3.3v but not on an ESP8266 , as apart from the cpu speed all things should be equal. I have sourced these chips from two different suppliers and they all behave identically.

I have now attached a 3.3k resister to +5v (ESP inputs are 5V rated - so I've read) whilst using it on a 3.3v esp and that seems to work very well also.

Thanks to all who took the time to comment.

Best Regards

dataguy