ESP8266 Community Forum

- Fri May 15, 2015 2:30 pm #17496 analogWrite() does not seem to work for any pin. No PWM pattern shows up on the actual pins.
https://github.com/esp8266/Arduino (latest release: arduino-1.6.1-p1-windows.zip)
Release notes state "analogWrite(pin, value) enables software PWM on the given pin..."
What am I missing???

- Sat May 16, 2015 9:22 am #17563 Which board are you using? the esp-01 doesn't have any analog pins. I know the esp-12 has 1.

- Sun May 17, 2015 11:13 am #17663

Which board are you using? the esp-01 doesn't have any analog pins. I know the esp-12 has 1.

I'm using an ESP-12, but that is not relevant. All ESP devices have digital pins that can be used for PWM output. AnalogWrite() puts out a PWM signal (on/off) with a duty cycle proportional to the analog output value. It does not output a varying analog voltage.

I'm evaluating it for use in a class. This thing is amazing.

Incidentally, the analog input on A0 works well, but not quite as expected: the reference voltage is 1.0v and it expects an input voltage in the range 0 to 1v. The WiFi works well, I'll publish the performance shortly.

- Sun May 17, 2015 11:29 am #17668 Hi, Im trying to update from the downloaded p1 zip for windows to the last core files on github.

This file is missing on the zip file:
https://github.com/esp8266/Arduino/blob ... ring_pwm.c

I copied libraries and hardware folders from the github to the downloaded one but I get errors on compile.

I'll work on it,but I want to know if anybody knows how to update the IDE without compile it

Regards!!