: Ralph Bacon’s video tutorial on Wireless Serial Comms and the accompanying GitHub repository
#include const int jdyRx = 2; const int jdyTx = 3; SoftwareSerial jdySerial(jdyRx, jdyTx); String incomingData = ""; boolean recvInProgress = false; void setup() Serial.begin(9600); jdySerial.begin(9600); Serial.println("Receiver Ready."); void loop() while (jdySerial.available() > 0) char rc = jdySerial.read(); if (rc == '<') recvInProgress = true; incomingData = ""; // Clear buffer else if (rc == '>') recvInProgress = false; processData(incomingData); else if (recvInProgress) incomingData += rc; // Append character void processData(String data) int parsedValue = data.toInt(); Serial.print("Received Value: "); Serial.println(parsedValue); // Example action: Turn on onboard LED if value is high if (parsedValue > 500) digitalWrite(LED_BUILTIN, HIGH); else digitalWrite(LED_BUILTIN, LOW); Use code with caution. Best Practices for Stable Performance
is a 2.4GHz wireless serial port transceiver module that offers an affordable alternative to the NRF24L01 for long-range (up to 120 meters) transparent data transmission MSS Eletrônica
Chip select pin. Connect to GND to keep the module active. Wiring Diagram for Configuration (Software Serial) jdy40 arduino example best
: For a look at how the JDY-40 is used in professional research, the peer-reviewed paper "Wireless Data Acquisition System with Feedback Function" in MDPI details its integration into a data acquisition sensor, highlighting its 3.3V power requirements and energy-efficient sleep modes. Practical Implementation Resources
This pattern is ideal for sensor networks, remote control systems, or any project where a central controller needs to poll multiple devices.
Disconnect the pin from GND when configuration is complete. Best JDY-40 Arduino Example: Transmitter and Receiver : Ralph Bacon’s video tutorial on Wireless Serial
// Define RX (JDY-40 TX) and TX (JDY-40 RX) pins SoftwareSerial jdy40(2, 3); // RX = pin 2, TX = pin 3
The JDY-40 is a half-duplex, 2.4GHz wireless transceiver module. Unlike the nRF24L01, which requires managing 20+ registers via SPI, the JDY-40 communicates over . To your Arduino, it looks exactly like a wire replacement.
// Define RX and TX pins for the JDY-40 // JDY-40 TX connects to Arduino Pin 2 // JDY-40 RX connects to Arduino Pin 3 SoftwareSerial jdySerial(2, 3); // RX, TX Wiring Diagram for Configuration (Software Serial) : For
Once configured, communication becomes simple. Anything sent into the serial port of Module A instantly outputs from the serial port of Module B.
Use the hardware serial monitor for debugging.
To get the most out of your JDY-40 setup, consider the following structural changes in your production builds:
For more complex setups, you can implement a where a "hub" sends messages to specific "nodes" using JSON identifiers. In this setup, every node receives the message, but only the one matching the "destination" field in the data processes it. Key Performance Specs Frequency : 2.4GHz (2400-2483.5 MHz). Power Consumption : ~40mA (TX), ~24mA (RX), 5μA (Sleep). Max Speed : 19,200 bps for transparent transmission.
1200 bps to 115200 bps (Default is 9600 bps) Communication Distance: Up to 120 meters in open spaces