Hi Yeez_B

I am also having issues with the probe. I'm using a firebeetle ESP32 with an Gravity I/O Expansion Shield - FireBeetle Covers (3.3v). I have changed the code as suggested above and set the offset for the PH4 solution to 1.38 and get PH 4.0 when the probe is in a PH4 solution. But when I move it to a PH7.0 solution it only reads 5.27 :-( I do rinse it when moving between the 2 PH solutions.

I don't know if I'm doing something wrong or if the probe is damaged as there was very little/no water covering the sensor in the enclosure when I received it.

Any ideas?

Sorry the link to the original pin mapping post didn't come out. It's https://www.thethingsnetwork.org/forum/t/dfrobot-firebeetle-lora-cover-ttn/21089/8