| CPC F24F 11/66 (2018.01) [F24F 11/54 (2018.01)] | 16 Claims |

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9. A method for transmitting a communication message over relay-controlled power line, the method comprising:
receiving, at a first power line converter, serial data from a controller;
converting the serial data to a communication message for transmission over a power line, wherein the power line is configured to transmit power and communication messages;
transmitting the communication message over the power line;
obtaining, at a sensor controller coupled to the power line and to one or more sensors, sensor data from the one or more sensors;
providing, by the sensor controller, the sensor data to a second power line converter coupled to the power line.
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