Flashing an ESP based receiver with Backpack firmware - ExpressLRS/Backpack GitHub Wiki

Follow these steps if you are using an ExpressLRS receiver such as the EP1 etc.

Wiring for flashing

There are no additional wiring requirements for the ESP receivers, since the initial backpack firmware is flashed to the receiver via wifi. Wire up the receiver as per the Wiring Guides page.

Downloading the firmware binary

The backpack firmware binaries are distributed on the Releases page here on github. Go to the Assets section on the latest release and download the <module type>_<backpack hardware type>_Backpack file. For example, if you are using the EP1 receiver on the Rapidfire module, you would use Rapidfire_ESP_RX_Backpack.

Flashing

  1. Power on the goggles and module, and wait for the LED on the receiver to start flashing rapidly, indicating that it has jumped to wifi hotspot mode
  2. Connect your computer to the "ExpressLRS RX" wifi hotspot (wifi password is expresslrs)
  3. In a browser, type 10.0.0.1 into the address bar and hit enter (the page may have auto-loaded already for you).
  4. Scroll down until you see the two buttons for choosing a file and flashing
  5. Press "Choose file..." and locate the firmware you downloaded in the section above (you can also drag and drop the .bin file onto the "Choose file..." button)
  6. Press "Update"
  7. After you see "Update success, rebooting...", wait for ~30 seconds to give the ESP a chance to do the actual flash write before power cycling
  8. Done! Move on to Binding