Product overview
The Happymodel Crazybee F4 Pro V1.0 1-2S is an integrated flight controller for brushless whoop aircraft. Its 28.5 × 28.5mm board weighs 4.2g and combines an STM32F411CEU6 processor, running at 100MHz with 512K flash, with an SPI-connected MPU-6000 sensor. The board also incorporates a BLHeli_S four-in-one ESC, SPI-controlled Betaflight OSD, voltage detection and a current meter. Integration provisions include multiple serial ports and a built-in 5V, 1A buck/boost regulator with an LC filter.
Receiver equipment varies by configuration. The Frsky version has a built-in SPI receiver with telemetry and switchable D8/D16 operation. The Flysky version also uses an SPI receiver with telemetry, supporting AFHDS and AFHDS-2A. The DSMX version incorporates a serial-based DSM2/DSMX-compatible satellite receiver and uses RX2 by default. The No RX version supports external serial-bus receivers, including XM+, Crossfire, S-FHSS, DSM2/DSMX and iBUS. These receiver arrangements are offered as separate versions of the flight controller.
The controller accepts 1–2S battery input at DC 3.5–8.7V, with LiPo and LiPo HV support specified for the onboard ESC. Each ESC is rated at 5A continuous, with a 6A peak limited to three seconds. Its EFM8BB21 processor supports BLHeliSuite programming, BLHeli_S pass-through and default DSHOT600 operation. The current meter supports up to 28A with its scale set to 1175. Supplied equipment comprises one controller, two power cables and one set of shock-absorbing rubber and screws; this is an electronics package rather than a complete aircraft or airframe kit.
Specifications
| Specification | Value & conditions |
|---|---|
| Product identity and purpose | Happymodel Crazybee F4 Pro V1.0 1-2S flight controller for brushless whoop aircraft. |
| Flight controller processor | STM32F411CEU6 (100MHZ, 512K FLASH). |
| Motion sensor | MPU-6000 with SPI connection. |
| Board dimensions | 28.5 × 28.5mm. |
| Weight | 4.2g. |
| Flight controller power supply | DC 3.5–8.7V.1–2S battery input. |
| Integrated motor control | Built-in BLHeli_S four-in-one ESC; 5A each; DSHOT600 ready.5A rating for each ESC. |
| ESC processor | EFM8BB21. |
| ESC power supply | 1–2S LiPo/LiPo HV (3.5V/8.7V).1–2S LiPo or LiPo HV battery. |
| ESC current | 5A continuous; 6A peak for 3 seconds.Peak current limited to 3 seconds. |
| ESC programming | Programmable through BLHeliSuite. |
| ESC firmware | S_H_50_REV16_7.Hex.Factory ESC firmware. |
| ESC protocol | DSHOT600.Default ESC configuration. |
| Frsky receiver | Built-in SPI Frsky receiver with telemetry; switchable D8/D16.Frsky version. |
| Flysky receiver | Built-in SPI Flysky receiver with telemetry; AFHDS/AFHDS-2A compatible.Flysky version. |
| DSMX receiver | Built-in serial-based DSM2/DSMX-compatible satellite receiver.DSMX version; RX2 used by default for the DSM2/DSMX receiver. |
| External receiver support | Supports external serial-bus receivers including XM+, Crossfire, S-FHSS, DSM2/DSMX and iBUS.No RX version; external serial-bus receiver. |
| On-screen display | Built-in Betaflight OSD with SPI control. |
| Current measurement | Built-in current meter sensor; maximum 28A; scale 1175.Current meter scale set to 1175. |
| Regulated power output | Built-in 5V, 1A buck/boost regulator with LC filter. |
| Voltage monitoring | Built-in voltage detection. |
| ESC pass-through | BLHeli_S pass-through ready. |
| Serial interfaces | Multiple serial ports supported. |
| Intended integration | Designed for integration into brushless whoop aircraft. |
| Included equipment | 1 × CrazybeeF4 PRO flight controller; 2 × power cables; 1 set of shock-absorbing rubber and screws.Supplied package. |
