# Polycab PSIS-3K-SM1: recovering Bluetooth telemetry for MQTT

> Polycab Solar Inverter to MQTT reads Bluetooth telemetry from a PSIS-3K-SM1 inverter using values the author says were recovered from its Android monitoring app. A Python service publishes solar power, voltage, current, temperature and energy readings to a Mosquitto MQTT broker.

- Type: Case study
- Targets: Protocol
- Category: Independent reconstruction cases
- Relationship: Independent reconstruction project
- Sources reviewed: 2026-11-06
- Added to the catalog: 2026-11-09
- Original resource: <https://github.com/Safarchand/Polycab-Solar-Inverter-to-MQTT>
- Primary source: <https://github.com/Safarchand/Polycab-Solar-Inverter-to-MQTT/blob/af36ecd537beca1d7f899b33fbcd5fc5a9071766/README.md>
- Catalog page: <https://awesomerea.org/resources/polycab-solar-inverter-to-mqtt-case/>
- Record JSON: <https://awesomerea.org/resources/polycab-solar-inverter-to-mqtt-case/record.json>
- Chinese version: [简体中文](https://awesomerea.org/zh/resources/polycab-solar-inverter-to-mqtt-case/index.md)

## Requirements & limits

- **Prerequisites:** A Polycab PSIS-3K-SM1 inverter with Bluetooth access and an MQTT broker; the author runs the script on a Raspberry Pi Zero 2 W.
- **Limits:** The author has not identified the meaning of the Active Power field.
- **License:** No licence file in the repository.

## Primary sources

1. <https://github.com/Safarchand/Polycab-Solar-Inverter-to-MQTT/blob/af36ecd537beca1d7f899b33fbcd5fc5a9071766/README.md>

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## About this entry

The description was reviewed against primary sources.
Original editorial content: MIT. Linked projects, papers and assets retain their own rights and licenses.