ESPTube Clock — Web Flasher

Recovery / bootstrap flasher for the SI HAI IPS tube clock. No toolchain needed.

  1. Use Chrome or Edge on a desktop/laptop (WebSerial isn't in Safari/Firefox or on phones).
  2. Plug the clock into USB — through the powered hub (it won't enumerate straight into a Mac).
  3. Click Install, pick the serial port, and confirm. It erases and reflashes the whole device.

If the button says "Not supported," you're not in Chrome/Edge desktop.

After flashing
  1. A full flash wipes saved settings, so the clock makes a esptube-setup WiFi network.
  2. Join it, open http://192.168.4.1, and enter your 2.4 GHz WiFi.
  3. Find it back on your network (esptube.local) and open tools/helper.html.

Just lost WiFi (didn't brick)? You don't need this — the clock already falls back to the esptube-setup portal on its own. Reflash only if it won't boot or behaves badly.

Full recovery options (USB / stock restore / portal) are in docs/RECOVERY.md. Source & firmware: the repo.