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smart_bms

Python connector for Chinese Bluetooth Smart BMS like in the pictures below (also ones branded as QUCC BMS):

Library

There are two transports provided:

  • Serial - for use with UART USB converters,
  • BLE - for use with the original Bluetooth Low Energy module supplied with the BMS

Example

import asyncio
from smart_bms.SmartBMSClient import SmartBMSClient
from smart_bms.TransportBLE import TransportBLE
async def main():
 tr = TransportBLE("xx:xx:xx:xx:xx:xx")
 await tr.start()
 client = SmartBMSClient(tr)
 while True:
 print(await client.read_basic_information())
 print(await client.read_cell_voltages())
 await asyncio.sleep(1)
asyncio.run(main())

Example output

SmartBMSBasicInformation(voltage=58550, current=0, remaining_capacity=6800,
 nominal_capacity=6800, cycles=1, prod_date=11455, protection_status=0, soft_ver=34,
 rem_cap=100, charging_open=True, discharging_open=True, cells_count=14,
 temperatures=[24.6, 21.8, 21.6], 
 cell_balancing_status=[
 False, False, False, False, False, False,
 False, False, False, False, False, False, False, False])
[4178, 4182, 4181, 4180, 4178, 4184, 4183, 4185, 4180, 4183, 4185, 4186, 4184, 4183]

Requirements

  • Bleak - Python BLE client

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Python connector for Chinese Bluetooth Smart BMS.

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