# syssi/esphome-jk-bms

ESPHome component to monitor and control a Jikong Battery Management System (JK-BMS) via UART-TTL or BLE

Repository: https://github.com/syssi/esphome-jk-bms
Canonical: https://ross.abutalabs.com/products/esphome-jk-bms
Language: C++
License: Apache-2.0
License Family: permissive
Topics: esphome, esphome-component, jkbms, jikong-bms, heltec-balancer, neey-balancer, bluetooth, uart, hacktoberfest
Last push: 2026-09-01T16:11:29+00:00

## Health v2 (maintenance only)
Score: 91/100 (v2, computed 2026-09-03T02:20:16.233290+00:00)
- activity 100, release rhythm 73, longevity 100
- inputs: {"age_days": 1851, "days_push": 1, "days_rel": 100, "gap_med": 80.5, "n_releases_24m": 5}
- flags: none
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 1004, forks 318 (observed 2026-09-03T02:15:18.367067+00:00)

## What it is
An ESPHome external component that monitors and controls Jikong (JK) Battery Management Systems over UART-TTL or Bluetooth LE. It exposes BMS telemetry such as cell voltages, temperature, and state of charge to ESPHome and Home Assistant.

## Use cases
- monitor JK-BMS battery cells from Home Assistant
- read BMS telemetry over BLE with ESP32
- control JK battery management system settings remotely
- log lithium battery cell voltages and temperatures
- integrate DIY solar battery BMS into home automation
- monitor JK-BMS via UART-TTL serial connection

## When to choose
- you run ESPHome/Home Assistant and own a JK-BMS with software version 6.0 or newer
- you want local, wireless-free (UART) or BLE monitoring without vendor cloud apps
- you need cell-level telemetry and BMS control in your automation setup

## When to avoid
- your BMS is not a Jikong/JK model or runs software older than 6.0
- you don't use ESPHome and prefer a standalone MQTT bridge or vendor app
- you need a different balancer brand like Heltec or Neey (separate components exist)

## Facets
- artifact type: plugin
- maturity: active
- function: monitoring, iot, embedded
- domain: iot, self-hosted, hardware
- platform: embedded, iot
- tags: esphome, jk-bms, battery-management-system, ble, uart, home-assistant, solar-battery, diy-battery

## Member repositories
- syssi/esphome-jk-bms (main) score 91

## Provenance
- Observed fields: from GitHub, fetched 2026-09-03T02:15:18.367067+00:00.
- Health v2: computed from the inputs above; adoption is never an input.
- Inferred fields (summary, facets, guidance): AI-extracted, prompt v1, taxonomy v1, on 2026-08-30T07:14:07.736681+00:00, confidence not recorded.
  - readme: https://github.com/syssi/esphome-jk-bms (fetched 2026-09-03T02:15:18.367067+00:00, sha 4f5496b034b3)
- Data as of 2026-08-30T08:39:29.467469+00:00.