: Keep the onboard PCB antenna away from large metal objects or high-interference components like motors to maximize range. AT command list to change the communication channel or transmission power?
This tiny, low-cost module acts like a wireless serial cable. You type data into one Arduino’s Serial Monitor, and it appears on another Arduino instantly. No complicated addressing, no SPI headaches—just plain old TX and RX.
Summary
The is a highly versatile 2.4GHz wireless serial port module that serves as an affordable alternative to the NRF24L01 . It is designed for "transparent transmission," essentially acting as a wireless USB cable between microcontrollers like the Arduino. 1. Key Specifications & Performance Range: Up to 120 meters (line-of-sight).
To configure the module, pull the . All commands must end with \r\n (CR+LF). jdy40 arduino example best
2.2V to 3.6V (strictly 3.3V logic; 5V will damage it).
| Arduino Pin | JDY-40 Pin | | :--- | :--- | | 3.3V | VCC | | GND | GND | | TX (Pin 1) | RX | | RX (Pin 0) | TX | : Keep the onboard PCB antenna away from
Using 5V on VCC will fry the JDY-40. Don’t do it.