The Arduino sketch provided here programs an RF69 receiver to transmit, and receive and decode, RF packets to/from Danfoss RF thermostats similar to the TP7000.

The sketch by default uses a baud-rate of 57600bps. The interface is simple: for each received RF packet a line will be printed like RECV TTTT CMD where TTTT is the thermostat ID and CMD is either ON, OFF, or LEARN.

You can transmit packets by sending CTTTT\n, where C is O for On, X for Off, or L for Learn, and TTTT is the thermostat ID.

See https://hackingathome.wordpress.com for more info.

Danfoss thermostat transceiver
RECV 0x77B4 OFF
RECV 0x77B4 OFF
RECV 0x77B4 OFF
ISSUE 0x77B4 ON
RECV 0x77B4 OFF
RECV 0x53C0 OFF
RECV 0x53C0 OFF
RECV 0x77B4 OFF
RECV 0x77B4 OFF
RECV 0x53C0 OFF
RECV 0x77B4 OFF
RECV 0x53C0 OFF
RECV 0x77B4 OFF