ESP8266 Community Forum

- Thu Mar 24, 2016 3:00 am #43919 I have ESP8266 Community version 2.1.0 installed on my Arduino IDE 1.6.7 under Windows 10.
As soon as I read adc value (not the internal VDD33 but the voltage [0-1V] on TOUT), the esp watchdog makes it rebooting.

Soft WDT reset

ctx: cont
sp: 3fff03f0 end: 3fff05d0 offset: 01b0

stack > > >
3fff05a0: 3fffdad0 00000000 3ffef4e0 4020243f

3fff05b0: feefeffe feefeffe 3ffef595 4020319c

3fff05c0: feefeffe feefeffe 3ffef5b0 40100958

< < < stack < < <

Note that doing a delay(0) just after the analogRead(A0) does not help

I read a lot of forum thread, on this github project, but also on esp8266.com, and apparently, all proposed solutions and workaround don't work in my case.

Something interresting: I flashed the latest nodemcu firmware, and doing print(adc.read(0)) give me the correct value without WDT crashing. I tried to use the same code as in file adc.c of nodemcu_firmware project, without success. There must be another problem elsewhere, and indeed, a difference between nodemcu firmware and the binary that I generate from Arduino IDE.

Could someone help me because I have no more idea.

- Thu Mar 24, 2016 3:19 am #43921 I found my mistake:

Code: Select allwhile (1);
{
  word tout = 0;
  tout = analogRead(A0);
  delay(300);
}

The semicolon at the end of the while...

- Thu Mar 24, 2016 8:23 am #43940