JK-BMS Bluetooth to Wi-Fi Gateway Box (ESP32 + TPS54X60)
Description
This is a compact, functional enclosure for a DIY JK-BMS to Home Assistant Gateway. The device acts as a bridge, reading battery telemetry via Bluetooth (BLE) from a JK-BMS and transmitting it to Home Assistant via Wi-Fi (using ESPHome or MQTT).
https://github.com/syssi/esphome-jk-bms
The case is specifically designed to house a high-voltage DC-DC step-down converter, allowing the gateway to be powered directly from the battery pack (up to 60V).
Technical Specifications
Controller: ESP32-WROOM-32U DevKitC (U-version with external antenna connector for better range inside metal battery cabinets).
Power Supply: DC-DC buck converter based on TPS54360 / TPS54560 (supports wide input voltage, ideal for 16S LiFePO4 packs).
Connectivity: Bluetooth Low Energy (BLE) for BMS link + 2.4GHz Wi-Fi for HA integration.
Application: Solar energy storage systems (ESS), DIY Powerwalls, and Smart Home battery monitoring.
Features of the Case
Mounting: Secure fit for the ESP32 DevKitC.
Thermal Management: Ventilation slots to ensure the TPS54X60 remains cool during operation.
Antenna Port: Dedicated cutout for an external SMA antenna pigtail.
Cable Management: Input/output ports for power and optional wired connections.