lastButtonState = buttonState;

In the world of DIY electronics and IoT prototyping, Bluetooth and WiFi modules often steal the spotlight. However, when you need simple, low-power, and surprisingly long-range data transfer, the JDY-40 is a hidden gem.

SoftwareSerial jdy40(4, 3);

Jdy40 Arduino Example Best Updated May 2026

lastButtonState = buttonState;

In the world of DIY electronics and IoT prototyping, Bluetooth and WiFi modules often steal the spotlight. However, when you need simple, low-power, and surprisingly long-range data transfer, the JDY-40 is a hidden gem. jdy40 arduino example best

SoftwareSerial jdy40(4, 3);