FAQ

What do the LEDs on the dongle mean?

The power LED indicates that the dongle has power and should stay on continuously. The P1 output LED, if present, blinks when data is transmitted on the P1 output. The status LED shows boot, ready and error states. See LED indicators for the detailed firmware v2 behaviour per hardware variant.

The power LED is off or unstable

The power LED should be on continuously when the dongle has power. Check the P1 cable, USB power supply and whether the smart meter supplies enough power on the P1 port. Older smart meters may require USB power.

The status LED shows three short flashes followed by a pause

On firmware v2 this means that the RS485 module is not detected. Modbus communication is disabled until the module is available again. Check that the module is installed correctly and reconnect or reboot the dongle.

Which firmware version is installed on the dongle?

Connect the dongle with a USB data cable and read the firmware version through the serial port. This is supported from firmware version 1.1.0. If no version number is shown, the dongle is running an older firmware version.

Strange errors

Always check that the phases are connected correctly. Phase 1 to phase 1 of the smart meter and phase 1 to the consumer appliance, etc. If they are reversed, the control circuit is no longer correct.