// Baud Rates const long PC_BAUD = 115200; // Speed for Serial Monitor const long JDY_DEFAULT_BAUD = 9600; // Factory default const long JDY_TARGET_BAUD = 115200; // Desired speed for project
You must configure the JDY-40 for best range and low interference. Connect the module directly to your PC via a USB-Serial adapter (3.3V). Send AT commands ending with \r\n . jdy40 arduino example best
The is a highly efficient 2.4GHz wireless transceiver module favored for its simplicity, as it operates as a standard UART serial bridge . Unlike the more complex NRF24L01, it does not require specialized libraries for basic communication, making it an excellent choice for beginner Arduino projects like remote sensor reporting or wireless robots. Quick Review & Specifications // Baud Rates const long PC_BAUD = 115200;
A full-duplex communication bridge that allows the user to change the JDY-40 baud rate via Arduino code (removing the need for USB-to-TTL adapters for setup) and provides a "Heartbeat" signal quality indicator . The is a highly efficient 2
JDY-40 logic is 3.3V. For long-term reliability, use a level shifter on RX. However, many users directly connect to 5V Arduino pins without damage.
#include <SoftwareSerial.h>