Air Brushless Flight Controller - 4IN1 // 5IN1

Specification of 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: 50 Ω 
• Operating Temperature: -10℃~+80℃

4IN1&5IN1 

Choose this higher integration Air Brushless Flight Controller, for an ultra-light 1S whoop installation, tailored to meet the needs of discerning pilots. It is default integrated onboard 25-400mW VTX, the 5IN1 Version that integrates FC+ESC+OSD+VTX+RX goes a step further by integrating the Serial ELRS 2.4G RX, streamlining installation to save space and reduce weight, and enhancing convenience for VTX and FC adjustments. The 4IN1 Version removes the RX port for added versatility, providing pilots with more external RX options. 

Serial ELRS 2.4G RX

Serial ELRS 2.4G RX uses the Crossfire serial protocol (CRSF protocol) to communicate between the receiver and the flight controller board. So the Serial ELRS 2.4G RX is available to support upgrading to ELRS V3.0 with no need to flash Betaflight flight controller firmware. Enter binding status by power on/off three times.

• Plugin and unplug the flight controller three times;
• Make sure the RX LED is doing a quick double blink, which indicates the receiver is in bind mode;
• Make sure the RF TX module or radio transmitter enters binding status, which sends out a binding pulse;
• If the receiver has a solid light, it's bound.

The Serial ELRS 2.4G RX can be updated via Wi-Fi or Betaflight serial passthrough. Here is the way to update the Serial ELRS 2.4G RX firmware through passthrough.

• Plug in your FC to your computer, but do NOT connect to betaflight configurator;
• Choose target "BETAFPV 2.4GHz AIO RX";
• Flash using the Betaflight Passthrough option in ExpressLRS Configurator.

How to flash firmware via Wi-Fi here.

Betaflight Firmware and CLI 

Betaflight official developers recommend using version 42688 of the gyroscope, and many issues with ICM42688 have been fixed in version 4.5.0. Please learn more from version 4.5.0.

Bluejay ESC Firmware

With BB51 ESC solution,  Air Brushless Flight Controller is based on A_X_5_96KHz_V0.19.hex for BB51 Bluejay hardware, it supports D-shot300, D-shot600, and even RPM filtering in Betaflight, offers 24KHz, 48KHz, and 96KHz fixed PWM frequency for options, and custom start-up melodies. 

DO NOT flash the firmware with a shorter interval, otherwise, there will be a certain chance of stalling and burning the flight controller.

• ESC-Configurator: https://preview.esc-configurator.com/
• Download BLHeliSuite16714903
• Download the Bluejay ESC firmware. Please choose A_X_5_96KHz_V0.19.hex

Connecting External RX/VTX

Please note that UART2 has connected to the VTX by default. This FC reserves 3 complete full-featured serial ports that can be used for external CRSF/SBUS receivers, GPS, HD VTX, or other serial devices. You can refer to the below pictures. 

Attention

• VTX Power: Higher VTX power consumes more energy and generates more heat, reducing flight time. For better flight time in indoor scenarios, use 25~100mW power.
• Motor Wiring: Only soldering is supported for motor wiring on the flight control. Avoid terminal plugging.
• VTX Antenna: Connect and install the image transmission antenna before powering on the flight control. Alternatively, set transmission power to 0 to avoid burnout.

Recommend Parts

• Drones:  Air65, Air75
• Frames: Air65, Air75, Meteor65, Meteor65 Pro, Meteor75 Pro
• Motors: 0702/0702SE, 0802/0802SE, 1102
• Receiver: ELRS Lite Receiver, ELRS Nano Receiver

Package

• 1 * Air Brushless Flight Controller
• 1 * 2.4g Antenna (Only 5IN1 Version)
• 1 * Type-C to SH1.0 Adapter 
• 1 * SH1.0 4Pin Adapter Cable
• 1 * 5.8g VTX Antenna
• 1 * BT2.0 U Whoop Cable Pigtail | 40mm
• 4 * M1.4*4 Self-tapping Screws
• 4 * Shock Absorbing Ball