mmWave board hanging sketch
![userHead](https://dfimg.dfrobot.com/61656fcbaa9508d63a4178d2/makelog/1a06eed306c9c1eaf0f67b4eb59c755f_150x150.png)
I have two copies of the mmWave board and I can't make them work. When I first got them, I wired one up and got it working then wrote about it here: https://johnwargo.com/posts/2023/dfrobot-mmwave-radar/
I'm trying to wire the board into my project and now, suddenly, the code simply won't work. Here's a link to the code: https://gist.github.com/johnwargo/159f8808b4b14694b953a7e96b48cb6f
The board initializes (which takes 12 seconds), but then when the sketch makes a call to `readPresenceDetection`, the sketch hangs and nothing executes after that line of code.
I dug out my second board and wired it in and it does the same thing. I don't understand what's different here. I've now tried two different Feather boards and two different mmWave boards.
Any ideas anyone?
@yeez_B I don't know enough about ESP32 serial ports to understand what you mean by try another serial port.
![userHeadPic](https://dfimg.dfrobot.com/61656fcbaa9508d63a4178d2/makelog/1a06eed306c9c1eaf0f67b4eb59c755f_50x50.png)
I'm not very familiar with Adafruit's ESP32 board, but are you sure that GPIO20 can be used as a serial port? At least could not find the description in the Pinout of this board.
![userHeadPic](https://dfimg.dfrobot.com/dfPortrait2.png)
Maybe you could try on another Serial port
BTW - the board I'm using here is a Adafruit ESP32 Feather V2 which is why I'm using HardwareSerial in my sketch.
![userHeadPic](https://dfimg.dfrobot.com/61656fcbaa9508d63a4178d2/makelog/1a06eed306c9c1eaf0f67b4eb59c755f_50x50.png)