Features

• Betaflight serial passthrough. It is convenient for pilots to flash any version of ELRS RX firmware and especially can flash ExpressLRS V3.0 without updating flight controller firmware.
• The SPI Frsky version board reserves an SBUS port and a UART port, which is available for the SBUS protocol receiver or other external receivers.
• Built-in an 8MB flash memory chip dedicated to Blackbox logging. It’s an extremely powerful tool for tuning and troubleshooting an FPV drone.
• Integrated motor pin connectors, it is easy to install motors without soldering work.
• Particular design with only 3.6g ultralight weight, reasonable layout, and easy to build. With a 26*26mm mounting hole size, it is fully compatible with the whoop frame in the current market.

Specifications of FC

• CPU: STM32F411CEU6 (100MHZ)
• Six-Axis: BMI270
• Built-in Receiver: Serial ExpressLRS 2.4G/SPI CC2500 (Frsky)
• Receiver antenna: Line antenna
• FC Size: 30*30mm
• Mounting Hole Size: 26*26mm
• Firmware version: betaflight_4.3.1_BETAFPVF411 (ELRS)/betaflight_4.2.11_BETAFPVF411RX (Frsky)
• OSD: Built-in BetaFlight OSD
• Blackbox: 8MB
• Recommend VTX: >=200mW, like BETAFPV M03 350mW VTX or TBS Unify VTX
• Power Cable: 55mm, with BT2.0 connector
• Weight: 3.6g(ELRS)/3.7g(Frsky), without power cable and BT2.0 connector

Specification of ESC

• Power supply: 1S
• Current: 5A continuous and peak 6A (3 seconds)
• ESC firmware: A_X_5_.HEX for BB51 BLHeli_S hardware
• Signal Support: D-shot150, D-shot300, D-shot600, Oneshot125, Multishot, PWM

F4 1S 5A flight controller with BB51 ESC hardware could flash the Bluejay ESC firmware now, which is based on BLHeli_S revision 16.7. With Bluejay ESC firmware, it supports bidirectional D-shot and RPM filtering in Betaflight, offers 24KHz, 48KHz, and 96KHz fixed PWM frequency for options, and custom start-up melodies

Pinout

Included

• 1 * F4 1S brushless flight controller (BT2.0 Connector)
• 4 * M1.2x4mm screws
• 4 * M1.4x5mm screws
• 4 * Anti-vibration rubber dampers