JDY-40 2.4GHz Transceiver Serial or IO mode

The JDY-40 is a complete wireless transceiver module operating in the 2.4GHz band. It can be configured to function as a transparent mode wireless UART, or as a remote I/O, turning ON or OFF a selected I/O under user control.

Power supply range: 2.2V to 3.6V
Frequency: 2.4GHz
Channels: 128
Tx Power: +12dbm
RX Sensitivity -97dbm
Tx Current: 40mA Typ.
Rx Current: 24mA Typ.
I/O Levels: TTL according to supply voltage used

The JDY-40 can be configured by a host using a small set of AT commands.

It can be used out of the box (default mode) without the need to enter AT configuration commands.

Default configurations:
Mode: Transparent mode UART
Baud Rate: 9600 Baud
Wireless ID: 8899
Device ID: 1122
Channel: 1
Transmit Power: +10dbm

Note: 2.4GHz is a pretty crowded band, you should expect some drops in communication during use.