Tagged: temperature sensor

Blindly Reverse Engineering a Wireless Protocol

Hackaday has brought to attention a document written by a Rory O’Hare which discusses the journey Rory took in trying a decode an unknown 433 MHz signal received from his SDR dongle.

If you are interested in manually decoding some unknown signals you may be interested in this write up as it discusses his entire journey including the failures he encountered along the way. Basically he records some packets using his SDR dongle, works out their bit patterns manually and then attempts to find correlations between the packets in an attempt to discover their structure. In the end his efforts are successful as he discovers that he is receiving a temperature sensor and is able to decode the temperature readings.

Discovering Correlations in the Received Packets
Discovering Correlations in the Received Packets

Decoding a Weather Temperature Sensor with the RTL-SDR and GNU Radio

Over on YouTube user MrCircuitMatt has uploaded two videos on how he was able to decode a temperature weather sensor using an RTL-SDR and GNU Radio. His videos go through the GNU Radio technical steps as well as the signal encoding theory he used to decode the temperature.

Using RTL-SDR to read temperature from outdoor sensor, part 1
Using RTL-SDR to read temperature from outdoor sensor, part 2