Jdy40 Arduino Example Best Link
23 mA average during continuous transmission.
jdy40.println(packet); // println adds newline as delimiter delay(5000); // Send every 5 seconds
The biggest mistake beginners make is connecting the JDY-40 to Serial (Pins 0/1). This clashes with the USB programmer and crashes your uploads. jdy40 arduino example best
The JDY-40 is a Bluetooth 4.0 module based on the CSR8510 chipset. It supports a wide range of Bluetooth protocols, including SPP (Serial Port Protocol), HID (Human Interface Device), and more. The module operates at a frequency of 2.4 GHz and has a maximum data transfer rate of 1 Mbps.
: Send AT+RFID12345678 -> Must match on both modules. 23 mA average during continuous transmission
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2.2V to 3.6V (strictly 3.3V logic; 5V will damage it). The JDY-40 is a Bluetooth 4
By following this guide, you should now have a better understanding of how to use the JDY-40 Bluetooth module with Arduino. Experiment with different projects and explore the possibilities of wireless communication with your Arduino board. Happy building!
#include <SoftwareSerial.h>
Because the JDY-40 is a 3.3V logic device, connecting it directly to a 5V Arduino Uno or Nano can damage the module or cause unstable behavior. Always use a logic level converter or a resistor voltage divider on the Arduino TX to JDY-40 RX line.
This example uses SoftwareSerial so you can keep your hardware Serial port free for the Serial Monitor. The same code can be uploaded to both the transmitter and receiver Arduinos to create a bi-directional "Wireless Serial Monitor".