I have a photon, installed with the latest 0.4.9 Firmware from develop and I use the Tinker app from my mobile phone to test the voltage output on the DAC pin.
The pin is set for OUTPUT and with analogWrite I set values. If the value is lower than around 1600 the voltage is 0, if the value is higher the voltage is 4.84. I use the BrewPi Spark with a 12v external power supply. I think with USB power it should have a max power of 3.3v. I guess.
Is this the normal to expected behaviour for this pin with analogWrite?
Apology, I was too fast to create a topic that is not Photon’s fault. I use a PCB board and measured with an multimeter at the connectors and no the pin’s on the Photon directly.
I checked via SETUP mode and screen that my firmware version is 0.4.9, which it was. Checking with the Tinker app and a normal digital multimeter via GND and the DAC pin. It changes the voltage correctly between 0 and 3.3v depending on the analogWrite value (0 to 4095).
The special PCB board I use did not transfer the pin voltage towards the connector where I measured originally. My mistake.