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Simple RF receive Docker image that translate RF signals to MQTT messages. Emulates Open MQTT Gateway but can be deployed virtually as a Docker container on Raspberry Pi using cheap RF receiver modules.
Raspberry Pi with RF Receiver Hardware 
RF Receiver and Transmitter Close Up – Bottom 
RF Receiver and Transmitter Close Up – Top
The gateway converts RF codes to MQTT messages. These are published on the home/gw/433toMQTT topic using the same format used by OpenMQTTGateway.
{"value": 451223 }