For testing serial connections from devices to ESP32 microcontrollers.
Connect a device over serial and test incoming/outgoing data.
Configured for M5Stack, change tft_espi library setup and the edit section in the header for other screens/kits.
To make device more useful Baud and Config can be set via a menu (BTNA to choose, BTNB or wait 5 secs to select)
Always:
RX<--->TX
TX<--->RX
GND<--->GND
Example WT32-SC01 conected to M5Stack. The message being displayed is evidence the serial connection is working.
