Product overview
The GEPRC GEP-20A-F4 AIO combines flight-control and brushless ESC functions in a compact electronics assembly for toothpick drone builds. Its STM32F411 controller works with a BMI270/42688 SPI gyro/accelerometer, while the ESC uses an 8BB21F16G MCU. Integration features include an AT7456E-based Betaflight OSD, current monitoring, an integrated LC filter and a 5V@1A BEC output. The flight-controller firmware target is GEPRCF411, and the ESC target is G_H_30. A MicroUSB port provides the physical USB connection; no barometer is fitted.
The board measures 32x32mm and uses a 26.5×26.5mm mounting pattern with M2 hardware, with an overall weight of about 7.3g. Silicone shock-absorbing columns help reduce vibration transmitted from the frame and motors. Power input is specified as 2–4S LiPo, with 20A continuous and 30A peak current. Recommended integration uses 12xx–15xx motors and 3″–5″ propellers. The supplied component package contains one controller, one power cable, eight screws and four soft silicone pieces. Receiver support covers the listed families and most SBUS receivers; external buzzer and LED control are also supported.
Specifications
| Specification | Value & conditions |
|---|---|
| Product | GEPRC GEP-20A-F4 AIO |
| Hardware type | All-in-one brushless flight controller for toothpick drones |
| Gyroscope update | June 14th, 2022: gyro updated to BMI270/42688 |
| MCU | STM32F411 |
| IMU | BMI270/42688 gyro/accelerometer (SPI) |
| Flight-controller firmware target | GEPRCF411 |
| OSD | BetaFlight OSD with AT7456E chip |
| Barometer | No |
| Current monitoring | Supported; built-in current sensor |
| External buzzer | Supported |
| LED control | Supported |
| USB port | MicroUSB |
| BEC output | 5V@1A |
| Power filtering | Integrated LC filter |
| ESC MCU | 8BB21F16G |
| Continuous current | 20A |
| Peak current | 30A |
| Input voltage | 2–4S LiPoLiPo battery input. |
| ESC signaling protocols | Dshot600, Oneshot, Multishot |
| Current meter | 210 |
| ESC target | G_H_30 |
| Board size | 32x32mm board; 26.5mm mounting holes (M2) |
| Mounting-hole pattern | 26.5×26.5mm, M2 |
| Receiver support | Frsky XM/XM+/R-XSR; Futaba; DSM/DSMX; FlySky; TBS Crossfire; AC900; most receivers supporting SBUS |
| ESC configuration | BLHeli_S 20A; built-in current sensor; maximum 4S battery support |
| Motor integration | 12xx–15xx motorsRecommended motor sizes. |
| Propeller size | 3″–5″With recommended 12xx–15xx motors. |
| Vibration isolation | Silicone shock-absorbing columns intended to reduce high-frequency vibration from the frame and motors |
| Weight | About 7.3gOverall weight; approximate. |
| Supplied configuration | 1 × GEP-20A-F4; 1 × power cable; 8 × screws; 4 × soft silicone piecesIncluded equipment. |
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