No complex pairing or protocols; it acts as a transparent serial connection (UART). Long Range: Up to 100-120 meters in open space. Low Power: Ideal for battery-operated Arduino projects. 1. Hardware Requirements 2x Arduino Boards (Uno, Nano, or Pro Mini) 2x JDY-40 Modules Breadboards and Jumper Wires 3.3V3.3 cap V level converter (JDY-40 is 3.3V3.3 cap V tolerant, though it often runs on 2. Wiring the JDY-40 to Arduino
This is the most frequently reported issue.
: Send AT+DVID1122 -> Must match on both modules for transparent 1-to-1 communication. jdy40 arduino example best
Как работать с беспроводным модулем jdy-40 и ардуино?
: Power supply (supports 2.2V to 3.6V. Use 3.3V from Arduino). GND : Ground connection. TXD : Transmit data pin (connects to Arduino RX). RXD : Receive data pin (connects to Arduino TX). No complex pairing or protocols; it acts as
Place the module away from metal objects or high-frequency devices. Power: Although they work with 3.3V3.3 cap V is safer for the IO pins.
What are you trying to send? (e.g., button presses, multiple sensor readings) Which Arduino board models are you using? What range/distance does your project require? Share public link : Send AT+DVID1122 -> Must match on both
This sketch listens for incoming serial data from the JDY-40, parses the packet using start and end markers, and outputs the isolated integer to the serial monitor.
Wireless data transmission is fundamental in IoT and embedded systems. While modules like HC-12 (433 MHz) and nRF24L01 (2.4 GHz) are popular, they require significant configuration. The JDY-40 offers a simpler alternative: it appears as a wireless serial cable. Any data sent to its TX/RX pins is transmitted to a paired receiver. This paper documents the minimum working example and characterizes its performance.
: 2.2V to 3.6V DC (Do not connect directly to Arduino 5V without a regulator). GND : Ground (Must be shared with Arduino GND).
void processPacket(String packet) // Expected format: <LENGTH;DATA;CHECKSUM> if (!packet.startsWith("<")