Jdy40 Arduino Example - Best

: Operates at 2.2V – 3.6V (3.3V is ideal). It is ultra-low power, with sleep modes consuming only 5µA .

For a deeper dive into the AT command sequence and advanced configuration, the detailed AT command set analysis is an excellent resource. If you'd like to explore more, I can provide: A for connecting the JDY-40 to a 5V Arduino Nano . jdy40 arduino example best

Connect two separate Arduino boards (Transmitter and Receiver) using the following pinout: JDY-40 Pin Arduino Pin (Uno/Nano/Pro Mini) Do NOT connect to 5V GND Common ground TXD Pin 2 (Software RX) Receives data from JDY-40 RXD Pin 3 (Software TX) Use a 1kΩ resistor inline for 5V Arduinos SET Pin 4 (Digital Out) Controls AT Mode / Data Mode CS Kept permanently low for active state Configuring the JDY-40 via AT Commands : Operates at 2

: 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). If you'd like to explore more, I can