Jdy40 Arduino Example Best Upd

: Send AT+DVID1122 -> Must match on both modules for transparent 1-to-1 communication.

const int buttonPin = 7; int buttonState = 0; int lastButtonState = HIGH;

Chip Select / Sleep Pin (Pull LOW for normal operation/AT mode, pull HIGH for sleep mode) jdy40 arduino example best

What are you looking to send? (e.g., simple text strings, sensor values, motor commands)

This blog post is structured for SEO, readability, and practical value. Copy it to your platform, add photos of the wiring, and embed a video of the Serial Monitor working for best engagement. : Send AT+DVID1122 -> Must match on both

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void loop() float temp = dht.readTemperature(); float hum = dht.readHumidity(); Serial.print(temp); Serial.print(","); Serial.println(hum); delay(5000); Copy it to your platform, add photos of

: Sets the communication speed. AT+BAUD4 sets it to 9600 baud (default).

| JDY-40 Pin | Arduino Pin | | :--- | :--- | | VCC | 3.3V (not 5V) | | GND | GND | | TX | Pin 4 (SoftwareSerial RX) | | RX | Pin 3 (via voltage divider) |