Install gPlug firmware

ESPHome firmware for gPlug smart-meter adapters — flashed from this page over USB, no tools to install.

Still running Tasmota? Copy the meter key (dKEY="…") out of the Tasmota script before you flash. Erasing the device destroys the only copy you control. See migration.md.

Plug the gPlug into this computer with a USB cable, then:

This browser cannot talk to USB devices. Use Chrome or Edge on a desktop computer — phones and Safari are not supported for flashing. Serial access needs a secure page (https).

Choose Erase device when asked: the flash layout differs from Tasmota's, so a first install has to start from an empty flash.

After flashing

  1. The gPlug opens a Wi-Fi access point called gPlug-Setup. Join it from your phone.
  2. The captive portal asks for your home Wi-Fi; the device reboots into it.
  3. Open http://gplug.local/ — the setup wizard asks for the gPlug variant and, on an encrypted meter, the key you saved.

From then on that same address is the live app, and further updates need no cable: Setup → Firmware takes the .ota.bin from the latest release.

Prefer the command line?

The same image as a file: gplug-factory.bin

esptool --chip esp32c3 --port <PORT> erase-flash
esptool --chip esp32c3 --port <PORT> write-flash 0x0 gplug-factory.bin

Source, documentation and releases: github.com/jluthiger/esphome-gplug