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The VRX-Backpack can be used with the following video receiver modules:
| VRX Module | Support |
|---|---|
| ImmersionRC Rapidfire | ✔️ Fully supported |
| Generic RX5808 Module | ✔️ Fully supported |
| FENIX Module | ✔️ Fully supported |
| TBS Fusion | ❌ Not yet supported (check back soon) |
The VRX-Backpack firmware can be flashed to the following hardware, then added to your VRX module:
- Bare bones ESP01f and regulator point to point
- Using an ELRS Nano PCB
- RX5808 Backpack using an ELRS receiver
- Pin Description
- Solid = On and waiting to receive packets.
- Rapid continuous flashing = WiFi has turned on. Connect to the "ExpressLRS Backpack" access point and open http://10.0.0.1 in your browser. From here firmware can be uploaded.
- Double flash and pause = Binding mode. Press the Bind button in your ELRS TX LUA script to bind the TX backpack to the VRx Backpack.
- Hold down during power up to force boot mode. Firmware can now be flashed with a FTDI dongle.
- Single press during Normal or Binding mode will restart the Backpack into WiFi mode.
- Single press during WiFi mode will restart the Backpack into normal mode.
Just like the ELRS receiver, a binding phrase can be used when flashing Backpacks. When used your TX and VRx Backpacks will instantly be bound.
-DMY_BINDING_PHRASE="default ExpressLRS binding phrase"
To enter Binding mode manually when a binding phrase has not been defined, power cycle the Backpack 3 times in a row. Turning on and off only needs to be done within 30s, and not 2s like the ELRS receivers. This provides enough time to power cycle your goggles and VRx module kindly.
Using the button to enter and exit WiFi mode can also be used to power cycle the Backpack 3 times and enter Binding mode.
- When in Binding mode and no bind packets have been received within 120s, the VRx Backpack will switch to WiFi mode. This provides a method of entering WiFi mode when a VRx Backpack is not bound and the button can not be used.