BetaFPV Air 1S 4IN1 Brushless AIO Flight Controller
BetaFPV Air 1S 4IN1 Brushless AIO Flight Controller – Four Core Systems on One 2.9g Board
Built for lightweight 1S FPV drones, BetaFPV Air 1S 4IN1 Brushless AIO Flight Controller integrates FC, ESC, OSD and an analog 5.8GHz VTX into one compact board. The STM32G473CEU6 runs at 168MHz, while the ICM42688P gyro communicates over SPI. Three full-featured serial ports remain available for devices such as an external CRSF/SBUS receiver, GPS or HD VTX, giving the 4IN1 version useful flexibility when choosing the rest of the electronics.
BetaFPV Air 1S 4IN1 Brushless AIO Flight Controller Key Features
- 4IN1 architecture: FC + ESC + OSD + VTX – reduces the number of separate boards required in an ultralight 1S build.
- Weight of only 2.9g – helps keep the electronics package light in compact whoop-class drones.
- STM32G473CEU6 processor at 168MHz – provides the processing platform used by BetaFPV for its Air series 1S controller.
- ICM42688P gyro with SPI connection – provides motion data directly to the flight controller for Betaflight processing.
- Integrated 5.8GHz VTX with 25/100/200/400mW and PIT settings – eliminates the need for a separate analog video transmitter in a standard configuration.
- 16MB Blackbox memory – allows flight data to be recorded for tuning and troubleshooting.
- Three available full-featured serial ports – provide connection options for an external receiver, GPS, HD VTX or other serial devices. UART2 is connected to the onboard VTX by default.
- 26mm x 26mm mounting-hole spacing – gives a clear reference when checking compatibility with the selected frame.
- Bluejay-based ESC firmware with D-shot300 and D-shot600 support – provides documented digital motor-control options for the integrated ESC
Core Components in One Lightweight Board
The Air series combines a powerful STM32G473CEU6 MCU, ICM42688P IMU, BB51 Bluejay 96K ESC firmware and an onboard 5.8GHz VTX with selectable output power up to 400mW. In the 4IN1 version, the flight controller, ESC, OSD and VTX are integrated on a board weighing only 2.9g, helping keep ultralight 1S builds compact and simple.
Built for Ultralight 1S FPV Builds
At only 2.9g, the 4IN1 version keeps the electronics package exceptionally light without giving up the STM32G473CEU6 processor, ICM42688P IMU, onboard VTX or Bluejay-based ESC. This makes the board particularly well suited to small whoop-style builds where every gram and every millimetre of internal space matters.
Means Only What You Need
The 4IN1 version integrates the flight controller, ESC, OSD and VTX, but leaves the receiver separate. This gives more freedom when selecting the RC system and avoids paying for or carrying an integrated RX that may not match the intended setup. Compared with the 5IN1 version, the difference is simple: 4IN1 keeps FC + ESC + OSD + VTX, while 5IN1 additionally includes the receiver.
Modern G4 Performance Without the Weight Penalty
The STM32G473 processor gives the Air controller a modern processing platform for Betaflight while keeping the entire board extremely light. BetaFPV’s CoreMark comparison places the G473 far ahead of the older STM32F411 platform and close to the STM32F405, showing why the Air series can deliver strong processing capability in a compact 1S controller.
BetaFPV Air 1S 4IN1 Brushless AIO Flight Controller Frequently Asked Questions (FAQ)
No. BetaFPV Air 1S 4IN1 Brushless AIO Flight Controller integrates FC, ESC, OSD and VTX, but the Serial ELRS 2.4GHz receiver is integrated only in the 5IN1 version. The 4IN1 version is intended for use with a separately selected external receiver.
BetaFPV Air 1S 4IN1 Brushless AIO Flight Controller is designed for 1S input voltage. The final battery, motors and propellers must still be selected together for the complete drone configuration.
Yes. BetaFPV Air 1S 4IN1 Brushless AIO Flight Controller includes an analog 5.8GHz VTX with selectable 25/100/200/400mW and PIT modes. BetaFPV instructs users to connect the VTX antenna before powering the board unless VTX output is set to 0.
Yes. BetaFPV Air 1S 4IN1 Brushless AIO Flight Controller provides serial connectivity for external receivers, and BetaFPV specifically documents CRSF and SBUS receiver connections.
BetaFPV Air 1S 4IN1 Brushless AIO Flight Controller uses a 26mm x 26mm mounting-hole pattern. Frame clearance and the position of surrounding components should also be checked before installation.
Yes. BetaFPV Air 1S 4IN1 Brushless AIO Flight Controller requires the motor wires to be soldered directly to the board; BetaFPV does not support plug-in motor connections on this model.
BetaFPV Air 1S 4IN1 Brushless AIO Flight Controller Connection Diagram
BetaFPV Air 1S 4IN1 Brushless AIO Flight Controller Schemma
BetaFPV Air 1S 4IN1 Brushless AIO Flight Controller Specifications
FC
Weight | 2.9g |
Mounting Hole Size | 26mm x 26mm |
CPU | STM32G473CEU6 (168MHz) |
Six-Axis | ICM42688P (SPI connection) |
BlackBox Memory | 16MB |
Sensor | Voltage & Current |
USB Port | SH1.0 4-Pin |
FC Firmware Version | Betaflight_4.5.0_BETAFPVG473 |
ESC
Input Voltage | 1S |
ESC Firmware | A_X_5_96KHz_V0.19.hex for BB51 Bluejay hardware |
Signal Support | D-shot300, D-shot600 |
VTX
Output Power | 25/100/200/400/PIT |
Frequency | 5.8GHz 48 channels, with Raceband: 5658~5917MHz |
Channel SEL | SmartAudio2.0 |
Modulation Type | FM |
Frequency Control | PLL |
All Harmonic | Max -50dBm |
Frequency Stability | ±100KHz (Typ.) |
Frequency Precision | ±200KHz (Typ.) |
Channel Carrier Error | ±1.5dB |
Antenna Port | 50Ω |
Operating Temperature | -10℃ + 80℃ |
BetaFPV Air 1S 4IN1 Brushless AIO Flight Controller Package Includes
- 1x Air Brushless Flight Controller 4IN1
- 1x Type-C to SH1.0 Adapter
- 1x SH1.0 4-Pin Adapter Cable
- 1x 5.8GHz VTX Antenna
- 1x BT2.0 U Whoop Cable Pigtail (40mm)
- 4x Self-Tapping Screw (M1.4*4)
- 4x Shock Absorbing Ball
