Finally a flight controller that has integrated ExpressLRS receiver – the BetaFPV F4 1S 12A AIO ELRS toothpick FC. Let’s take a closer look at its features, and how it works.
Where to Buy?
Features and Specs
- Weight: 6.5g including RX antenna and BT2.0 battery connector
- F411 Processor, MPU6000 Gyro
- Integrated RX (Frsky or ELRS)
- Type-C USB Port
- Integrated 4x12A ESC
- ESC firmware: BLHeli_S Z_H_30
- Input Voltage: 1S
ExpressLRS (ELRS) is an awesome RC system, if you don’t know what it is, take a look at this post. ELRS Receivers are generally very small and light weight, so it’s not impossible to use in small drones like toothpicks. But to have it integrated in the FC makes it even more compact and convenient to use.
The RX antenna connector is IPEX so if you want a longer antenna you can just replace it.
The BetaFPV F4 1S 12A AIO FC is designed primarily for the Toothpick class (ultralight 2.5″/3″ FPV drones). Mounting holes spacing is the same as tiny whoop FC at 26x26mm. For motor connection, it has solder pads as well as connectors (which are not soldered out of the box).
Top side close up:
Bottom side close up:
Note that it has only two UART’s. And if you are getting the ELRS version, the receiver is connected via UART1, so technically you only has one spare UART. In the Frsky version, RX is connected via SPI so both UART’s are free. The SmartAudio solder pad is actually pre-configured as soft-serial so it’s not taking up a hardware UART.
How to Bind ELRS RX?
Simple, it basically works exactly the same as a standalone BetaFPV ELRS Nano receiver. The RX is connected via UART1 internally (not SPI), so you can flash it via either WiFi or Passthrough.
Learn about how to setup ExpressLRS here.