EtherbulbGet a bulb
Web flasher

Flash Etherbulb from your browser.

Nothing is uploaded anywhere, and this site never asks for your Wi-Fi password. The bulb path works from any phone or computer. Only the USB flasher needs Chrome or Edge on a desktop (Web Serial).

Bulb over the air

The Athom / IoTorero bulb has no USB port, so the firmware goes in over Wi-Fi, through the bulb's own web page. Two steps: give the bulb your Wi-Fi, then upload the Etherbulb image there. Works from any phone or computer, iPhone included.

Step 1 – give the bulb your Wi-Fi

A factory bulb that knows no Wi-Fi opens an open hotspot – athom-rgbcw-xxxxxx (ESPHome) or IoTorero-xxxx / tasmota-xxxx (Tasmota). Join it, a setup page opens (otherwise go to http://192.168.4.1/), pick your Wi-Fi, enter the password, save. The bulb joins your network; find its address in your router's device list or as http://athom-rgbcw-xxxxxx.local/. Your password stays between your phone and the bulb.

Your Wi-Fi password never touches this website. You type it only on the bulb's own setup page, inside the bulb's hotspot. This page has no input fields for it, by design.

Step 2 – upload Etherbulb on the bulb's page

  1. Download etherbulb-athom-e27.bin (Etherbulb 0.1.0 for the Athom E27).
  2. Open the bulb's page in your browser (the link from step 1, or http://athom-rgbcw-xxxxxx.local/).
  3. ESPHome: scroll to “OTA Update”, choose the file, click Update. Tasmota: open …/up (Firmware Upgrade), choose the file under “Upgrade by file upload”, click Start upgrade.
  4. Wait about a minute. The bulb restarts as Etherbulb, keeps your Wi-Fi, and answers at http://etherbulb.local. A Tasmota bulb restarts twice: on first boot Etherbulb moves the partition table to two slots so that later updates work.
Why not fully automatic? Your browser will not let a page on the internet talk to a device on your home network (mixed content and private-network protection). So the last step is one file dialog on the bulb's own page.