|best|: Jdy40 Arduino Example Best

No library. No complex config. It just works.

| Problem | Likely Cause | Solution | |---------|--------------|----------| | No communication | Different RF channels | Send AT+CHx to both modules | | Garbage data | Baud mismatch | Set same baud rate (e.g., AT+BAUD0 ) | | No response to AT | SET pin not grounded | Pull SET low before power-up | | Short range | Antenna blocked | Keep antenna away from metal | jdy40 arduino example best

// Start JDY Serial at Default Factory Baud jdySerial.begin(JDY_DEFAULT_BAUD); No library