Renogy BLE

A Python library for communicating with Renogy Bluetooth Low Energy (BLE) devices and parsing their Modbus responses.

Overview

Library for communicating with Renogy devices over BLE using BT-1 and BT-2 Bluetooth modules for controller-style devices, plus direct BLE communication for Renogy inverters and Smart Shunt 300 devices.

Currently supported devices:

• Renogy charge controllers (such as Rover, Wanderer, Adventurer)
• Renogy inverters
• Renogy Smart Shunt 300

Future planned support:

• Renogy batteries

Installation

pip install renogy-ble

Usage

There are two common ways to use this library:

• Parse raw Modbus response bytes (if you already handle BLE I/O elsewhere).
• Use the built-in BLE client to connect, read, and parse data end-to-end.

Parse Raw Modbus Responses

Use this when you already have the raw Modbus response bytes and the register address you requested.

from renogy_ble import RenogyParser

# Raw BLE data received from your Renogy device
raw_data = b"\xff\x03\x02\x00\x04\x90S"  # Example data

# Parse the data for a specific model and register
parsed_data = RenogyParser.parse(raw_data, device_type="controller", register=57348)

# Use the parsed data
print(parsed_data)
# Example output: {'battery_type': 'lithium'}

Notes:

• raw_data must include the full Modbus response, including address, function code, byte count, and CRC.
• Parsed values may be scaled or mapped based on the register map (for example, voltages are scaled to volts).

Connect Over BLE and Read Data

The RenogyBleClient handles Modbus framing, BLE notification reads, and parsing. This example discovers a BLE device, connects, reads the default command set, and prints the parsed data.

import asyncio

from bleak import BleakScanner

from renogy_ble import RenogyBLEDevice, RenogyBleClient


async def main() -> None:
    devices = await BleakScanner.discover()
    ble_device = next(
        device for device in devices if "Renogy" in (device.name or "")
    )

    renogy_device = RenogyBLEDevice(ble_device, device_type="controller")
    client = RenogyBleClient()

    result = await client.read_device(renogy_device)
    if result.success:
        print(result.parsed_data)
    else:
        print(f"Read failed: {result.error}")


if __name__ == "__main__":
    asyncio.run(main())

Inverter Reads

Inverters use a dedicated BLE read flow. device_type="inverter" triggers the inverter-specific transport and parser path automatically.

import asyncio

from bleak import BleakScanner

from renogy_ble import RenogyBLEDevice, RenogyBleClient


async def main() -> None:
    devices = await BleakScanner.discover()
    ble_device = next(
        device for device in devices if (device.name or "").startswith("RNGRIU")
    )

    renogy_device = RenogyBLEDevice(ble_device, device_type="inverter")
    result = await RenogyBleClient().read_device(renogy_device)
    print(result.parsed_data)


if __name__ == "__main__":
    asyncio.run(main())

Smart Shunt 300 Reads

Smart Shunt 300 devices do not use the same Modbus command flow as Renogy controllers. device_type="shunt300" is handled by a dedicated notification-based client.

For one-off reads, RenogyBleClient.read_device() will automatically delegate to the shunt client:

import asyncio

from bleak import BleakScanner

from renogy_ble import RenogyBLEDevice, RenogyBleClient


async def main() -> None:
    devices = await BleakScanner.discover()
    ble_device = next(
        device for device in devices if (device.name or "").startswith("RTMShunt300")
    )

    renogy_device = RenogyBLEDevice(ble_device, device_type="shunt300")
    result = await RenogyBleClient().read_device(renogy_device)
    print(result.parsed_data)


if __name__ == "__main__":
    asyncio.run(main())

If you want the derived shunt energy totals to accumulate across repeated reads, reuse a single ShuntBleClient instance:

from renogy_ble import RenogyBLEDevice, ShuntBleClient

client = ShuntBleClient()
device = RenogyBLEDevice(ble_device, device_type="shunt300")
result = await client.read_device(device)

Custom Commands or Device IDs

You can supply your own Modbus command set or device ID if needed.

from renogy_ble import COMMANDS, RenogyBleClient

custom_commands = {
    "controller": {
        **COMMANDS["controller"],
        "battery": (3, 57348, 1),
    }
}

client = RenogyBleClient(device_id=0xFF, commands=custom_commands)

Features

• Connects to Renogy BLE devices and reads Modbus registers
• Connects to Renogy inverter devices and reads inverter-specific Modbus registers
• Connects to Renogy Smart Shunt 300 devices and parses BLE notifications
• Builds Modbus read requests with CRC framing
• Parses raw BLE Modbus responses from Renogy devices
• Extracts information about battery, solar input, load output, inverter status, controller status, and energy statistics
• Returns data in a flat dictionary structure
• Applies scaling and mapping based on the register definitions

Data Handling

Input Format

The library accepts raw BLE Modbus response bytes and requires you to specify:

• The device type (e.g., device_type="controller")
• The register number being parsed (e.g., register=256)

Output Format

Returns a flat dictionary of parsed values:

{
    "battery_voltage": 12.9,
    "pv_power": 250,
    "charging_status": "mppt"  # Mapped from numeric values where applicable
}

Extending for Other Models

The library is designed to be easily extensible for other Renogy device types. To add support for a new type:

1. Update the REGISTER_MAP in register_map.py with the new device type's register mapping
2. Create a new type-specific parser class in parser.py (if needed)
3. Update the RenogyParser.parse() method to route to your new parser

Contributing

Contributions are welcome! Please feel free to submit a Pull Request.

References

cyrils/renogy-bt

License

This project is licensed under the Apache License 2.0 - see the LICENSE file for details.