ESP8266 Community Forum

- Wed Apr 15, 2015 5:31 am #14570 This compiles OK so using "short unsigned int" for the vdd33 variable should be OK.

Code: Select allshort unsigned int readvdd33(void);


Extending my original example with Serial.print(readvdd33()) gives:

Schermafbeelding 2015-04-15 om 12.37.03.png

Not sure how to interpret the outcome of vdd33 (around 1450) yet.

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- Wed Apr 15, 2015 6:05 am #14575 That's strange, it shouldn't give a higher result than 1024 (the ADC is 10bit).

- Wed Apr 15, 2015 6:20 am #14580 I thought it returned a value in mV...

- Wed Apr 15, 2015 6:23 am #14582 As documented here it SHOULD return the Vcc value in mV:
http://www.nodemcu.com/docs/node-module/#node-module-node-readvdd33

Changed the declaration to "int", same result around 1750.

Code: Select allint readvdd33(void);


Huh!?