The is a versatile 2.4GHz wireless serial transceiver module that stands out for its simplicity, long-range capabilities (up to 120 meters), and built-in GPIO control modes . Unlike standard Bluetooth modules (like the HC-05) that typically have a 10m range, the JDY-40 acts more like a wireless serial cable, making it one of the best choices for long-distance Arduino projects. Key Specifications Operating Frequency: 2.4GHz Range: Up to 120 meters (line of sight)
To get the best results, use the SoftwareSerial library so you can keep the hardware serial port for debugging. jdy40 arduino example best
2.2V to 3.6V ( Note: 5V logic on Arduino requires a level shifter or 3.3V power) Baud Rate: Up to 19,200 bps Communication Interface: Standard TTL Serial (UART) Best Arduino Connection Example The is a versatile 2
Video #257: Serial Wireless Comms for Arduino (et al) - GitHub long-range capabilities (up to 120 meters)
