| JDY-40 Pin | Arduino Uno Pin | Notes | | :--- | :--- | :--- | | | 3.3V | Do not connect to 5V unless board has a regulator. | | GND | GND | Common ground is required. | | TX | Digital Pin 2 | (Uses SoftwareSerial) | | RX | Digital Pin 3 | (Use 1K-2K Resistor Divider for safety) | | EN | 3.3V | Must be HIGH for the module to run. |
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is a highly versatile, low-cost 2.4GHz wireless serial port module. Unlike Bluetooth, it uses a proprietary 2.4G protocol, making it faster for simple point-to-point communication between Arduinos with a range of up to 120 meters. Key Technical Specs Operating Voltage : 2.2V - 3.6V (Use a 3.3V regulator; it is 5V tolerant on VCC). : Standard Serial (UART). jdy40 arduino example best