Smart Meter Bridge – Xythobuz.de
A project named Smart Meter Bridge decodes SML power meter data via LoRa using Iskra MT681 meter and Heltec LoRa32 dev boards. It employs RadioLib for LoRa communication, power-saving measures, and shares energy consumption patterns effectively.
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A project called Smart Meter Bridge was initiated on July 6, 2024, aiming to read SML power meter data transmitted via LoRa. The project involves decoding SML messages from an Iskra MT681 smart power meter using an infrared UART interface. To transmit the data, two Heltec LoRa32 dev boards are utilized due to the meter's location being out of WiFi range. Unlocking the meter with a PIN from the provider allows access to detailed energy consumption data in finer resolution, including energy count in 1/10th Wh and current power in W. The project employs RadioLib for LoRa communication and implements power-saving measures like deep sleep and watchdog functionality on the ESP32. Despite occasional code issues, the project appears to be functioning effectively. The developer integrates this project into the ESP-Env repository and shares personal energy consumption patterns, showcasing the project's practical application. Additionally, the LoRa transmitter demonstrates low battery usage, with updates pending on its first recharge cycle.
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