Skip to main content
Firmware Stable

III. Usage

Controlling the BMS depends on the connected accessories. See Display and LEDs for detailed information about each display mode and button behavior.

OLED Display​

Navigate through information pages with a short button press. Long press on the main page toggles BMS ports on/off. See the display pages table for a full list of available screens.

WS LED​

The 4 RGB LEDs show the battery SOC as a bar graph with colors indicating the BMS state:

  • Short press — wake LEDs and show SOC
  • Double press — toggle USB charging output
  • Long press — toggle BMS ports on/off

Headless Operation​

If you do not have any accessory connected, set parameter ctlmode to 192. This enables headless mode with both auto-on and charger auto-on.

In this mode, the BMS will attempt to turn on the ports up to 5 times with increasing delays. If all attempts fail, the BMS stays off. See Control Mode for details.