Hi,
Can somebody explain, what’s the difference between the pin assignment and pin definition?
Datasheet from https://heltec.org/project/wireless-stick:
Pin assignment (picture) --> GPIO2, ADC2_CH2, TOUCH2.
Pin description (table) --> GPIO2, ADC1_CH1, TOUCH2.
Many GPIOs aren’t listed in the table!
Please help!
If I look at the pin diagrams for the other ESP32-S3 modules (WiFi LoRa 32 V3 and Wireless Stick Lite V3), I see that GPIO2 is identified as “ADC1_CH1, TOUCH2”, so I’d go with that. It may be, however, that the board definition file is also inconsistent—I haven’t checked that, but if all the V3 modules are using the same definition, it’s the assignment noted (ADC1_CH1) that will be correct.
Unfortunately, it seems like Heltec has been a bit sloppy with the documentation accompanying the ESP32-S3 upgrades and there seem to be more than a few such inconsistencies. They’ll get sorted out in the long run, but in the mean time I’ve resorted to this sort of comparison with the other S3 or even the earlier ESP32 modules to work out what’s really going on—unfortunately, the current documentation is just a starting point…
(EDIT: The ESP32-S3 datasheet is probably going to be the most definitive reference point, and it is also in accord with my original comment.)