The RF04 is a very easy to use radio telemetry module set for your I 2C devices.
The RF04 is a very easy to use radio telemetry module set for your I 2C devices. The main module is powered from the USB bus, so it needs no external power supply or batteries. Just plug it into your PC and it will appear as a COM port. The RF04 module set can be used by anyone who can program a PC to use the COM ports.
Power Requirement - Powered entirely from USB port
Over Air Data Rate - 19200 bps.
Default Frequency - RF04-400 (EU) 433.92MHz / RF04-900 (USA) 869.85MHz
Range - Up to 250m line of site, Up to 150m for RF04/900
Data Buffer - Internal 128 byte buffer