Jdy-40 Arduino — Example

#include <SoftwareSerial.h> SoftwareSerial jdy(2, 3); // RX = pin 2, TX = pin 3 const int buttonPin = 4; int lastState = LOW;

void loop() { int currentState = !digitalRead(buttonPin); // active LOW if (currentState != lastState) { jdy.write(currentState ? '1' : '0'); lastState = currentState; } delay(50); } jdy-40 arduino example

#include <SoftwareSerial.h> SoftwareSerial jdy(2, 3); // RX = pin 2, TX = pin 3 const int ledPin = 5; void setup() { pinMode(ledPin, OUTPUT); jdy.begin(9600); } #include &lt;SoftwareSerial