Jdy40 Arduino Example Best ^hot^ -

If you run into issues, here are the most common problems and solutions:

Here is the safe wiring for :

Because it works over UART, you can use Serial.print() to send data wirelessly. jdy40 arduino example best

: First, connect the JDY-40 to your Arduino as described above. To put the module into AT command mode, you must connect the SET pin to GND (LOW) and CS pin to GND.

For initial testing and configuration, a USB-to-Serial adapter (like FTDI or CH340) is very convenient. If you run into issues, here are the

void setup() Serial.begin(9600); // Communication with PC (Serial Monitor) Serial1.begin(9600); // Communication with JDY-40

/* * Title: JDY-40 Smart Bridge & Link Monitor * Description: The "Best" example to configure JDY-40 and monitor connection health. * * Circuit: * - JDY-40 TX -> Arduino Pin 2 * - JDY-40 RX -> Arduino Pin 3 * - Built-in LED (Pin 13) used for Link Status. */ */ // Receiver Code // Connect JDY-40 SET

// Receiver Code // Connect JDY-40 SET pin to GND for Transparent Mode

If you want a hassle-free wireless serial connection, the JDY-40 is the winner. If you need high-speed data transfer or are comfortable with SPI, the nRF24L01 is a solid, inexpensive option.

Arduino Uno/Nano 5V Voltage Divider JDY-40 Module ------------------- --------------- ------------- 3.3V ---------------------------------------------------> VCC GND ---------------------------------------------------> GND Pin 2 (Software RX) <------------------------------------ TXD Pin 3 (Software TX) ---> [ 1kΩ Resistor ] ---> Pin RXD | [ 2kΩ Resistor ] | GND Pin 4 (GPIO Setup) ------------------------------------> SET Pin 5 (GPIO Sleep) ------------------------------------> CS Master Configuration: AT Commands via Arduino