Input-only pins for SDS serial port

[bertrik]

Hi, I was just wondering, you mention that the SDS011 is connected to pins 36 and 39 of the ESP32. Looking at the pin lists at https://randomnerdtutorials.com/esp32-pinout-reference-gpios/ they are mentioned as input-only pins. Are you sure you are getting bidirectional communication with the SDS011?

Myself, I'm experimenting with an ESP32 TTGO LoRa board and I had to test out quite a few combinations before I found a set of pins for the SDS011 that work so I can actually send commands and receive a meaningful response. I'm using pins 35 (receive from SDS011) and 25 (send to SDS011) now.