| JDY-40 Pin | USB-to-Serial Adapter | | :--- | :--- | | VCC (9) | 3.3V | | GND (14) | GND | | TXD (11) | RX | | RXD (10) | TX | | SET (12) | GND | | CS (13) | GND |
void setup() Serial.begin(9600); // For Serial Monitor output Serial1.begin(9600); // For communication with JDY-40
Result 7 (programmersought) provides a guide with sample code for setting parameters and communication. Result 8 (programmersought) is similar. Result 9 (benjemmett) shows a multi-node network implementation with hub and remote nodes. Result 10 (CSDN) is a Chinese article with code. Result 11 (GitHub) is a Micropython library. Result 12 (Arduino Forum) is a troubleshooting thread. Result 13 (datasheet PDF) gives technical specifications and AT commands. Result 14 (leetechbd) provides a product page with pinout and AT commands. Result 15 (electro-think) gives demonstration and AT commands. Result 16 (androegg) describes modes. Result 17 (habr) is a discussion comparing JDY-40 with nRF24L01. Result 18 (taobao) gives a comparison with nRF24L01. Result 19 (Arduino Forum) is another troubleshooting thread. Result 20 (Arduino Forum) is another troubleshooting thread. jdy40 arduino example best
Upload this configuration sketch to both Arduinos individually. Open your Serial Monitor at (set to Both NL & CR ).
| Command | Function | Example Response | | :--- | :--- | :--- | | AT | Test connection | OK | | AT+VERSION | Query firmware version | Version=... | | AT+NAMEyourname | Change BT Name | OK (Sets name to "yourname") | | AT+BAUD4 | Set Baud Rate | OK (4 = 9600, 5 = 19200, etc.) | | JDY-40 Pin | USB-to-Serial Adapter | |
The is an incredibly versatile and affordable 2.4GHz RF transceiver module, often preferred for creating wireless serial communication bridges, replacing wires in projects, or even acting as a simple remote control . Unlike Bluetooth modules, the JDY-40 acts more like a wireless UART bridge, making it excellent for point-to-point communication between two Arduino boards, or an Arduino and a PC.
AT+POWE (Values range from 0 to 9; 9 is maximum power). Reset Module: AT+RESET clears buffers and applies changes. The Best JDY-40 Arduino Code Example Result 10 (CSDN) is a Chinese article with code
: Mode Selection Pin (Pull LOW for AT Command Mode, pull HIGH/Floating for Communication Mode)
The article should be long and comprehensive. I'll need to cite the sources appropriately. Let's begin. is an ideal choice for Arduino projects that need simple, reliable wireless communication. This guide will take you from the basics of its pinout to building complex, multi-node networks. We'll also cover the best code examples, practical applications, and how to fix common issues, making this your all-in-one resource for mastering the JDY-40.
3. The Best JDY-40 Arduino Example: Transparent Transmission