This is one of the first FC with built-in ExpressLRS (ELRS) receiver – the BetaFPV F4 1S 5A AIO FC. It’s super light weight, perfect for brushless tiny whoops.
The new ELRS versions of the BetaFPV Meteor65 and Meteor75 are also powered by this FC. I have been flying this FC in the new Meteor75 and it’s been reliable.
Where to Buy?
Features and Specs
The board itself uses as little material as possible to keep the weight down.
- F4 Processor
- MPU6000 Gyro
- Built-in ExpressLRS RX
- Loaded with Betaflight 4.3, BLHeli 16.8
- Input Voltage: 1S
- 5A ESC (6A Burst)
- 1 full UART, 1 half UART for VTX control (TX pin)
- Buzzer pad for beeper
- Dimension: 29x29mm
- Weight: 3.1g
Here’s the pinout schematics.
ExpressLRS Receiver Onboard
It has the ELRS 2.4GHz receiver built-in, with a ceramic antenna which makes it super compact. You don’t have to worry about mounting the RX antenna and worry about spinning propellers damaging it anymore.
The ELRS receiver is connected via SPI (not UART), so it’s setup slightly different in Betaflight (as explained on the product page, the receiver mode is set to SPI, and receiver provider is blank). But you don’t need to worry about the configuration as it’s all done in factory.
All you need to do is binding the FC to your radio by pressing the “Bind Receiver” button in the receiver tab. More info here.
The FC also has a SBUS pad in case you want to run an external receiver.
ESC and Motor Connection
It has motor connectors as well as solder pads, so you can either plug the motors directly to the board or solder your own.
The ESC’s are rated at 5A continuous current, 6A burst. This is suitable for 65mm as well as 75mm 1S tiny whoops.
The ESC’s are preloaded with BLHeli 16.8, meaning RPM filter is enabled out of the box. RPM filter is great for whoops as it increases flight time up to 50%.
Upgrading existing whoops to this FC is pretty straight forward.
The ExpressLRS SPI receiver firmware is part of the Betaflight firmware, so updating ExpressLRS can be done through updating Betaflight firmware. Configuration parameters can be set in CLI (not via the LUA script on the radio). More info here: https://github.com/betaflight/betaflight/pull/10788