PCB Antenna Keep-Out Zone Guide
What pins are input only?
Thought for 17 sec
On the ESP32-WROOM-32, the input-only GPIOs are:
Input-only pins
Table
| GPIO | Notes |
|---|---|
| GPIO34 | Input only |
| GPIO35 | Input only |
| GPIO36 | Input only |
| GPIO39 | Input only |
These pins are GPI only:
- No output capability
- No internal pull-up
- No internal pull-down
So if you use them for switches or logic inputs, you need external bias resistors if the signal source does not already provide a defined level.
If you want, I can also list the pins that should be avoided at boot separately from the input-only pins.
Specify the part
Check U1 pins
Use the datasheet