HAPPYMODEL CrazyF411 ELRS 4in1 Flight Controller Integrated UART 2-4G ELRS Receiver 20A ESC for 2-4S Toothpick Drone

Description

• The CrazyF411 ELRS flight controller comes with binding procedure. Please make sure your ExpressLRS tx module firmware is v3.x.x. Go through the operation steps to enter the binding mode.
• Flight controller: MCU:STM32F411CEU6 (100M, 512K FLASH); Sensor: ICM42688P or BMI270 (SPI Control); Power supply: 2-4S Lipo battery; Flight controller firmware target: CRAZYBEEF4DX.
• Onboard 4in1 ESC: MCU upgraded to EFM8BB21; Power supply: 2-4S LiPo/LiPo HV (7v/17v); Currents: 20A continuous peak 25A (5 seconds); Support BLHeliSuite programmable; Firmware target: F_H_40_48_v0.18.1.
• Onboard UART ExpressLRS 2-4G RX: Packet Rate option: 25/50/150/250/500; RF Frequency: 2-4G; Antenna plug: IPEX; Telemetry output Power: <12dBm; Receiver protocol: CRSF.
• And because the 2.-4G ExpressLRS receiver is equipped with the SX1280 radio frequency chip with high sensitivity, high packet rate and low latency, this flight controller is the one that all Race/Freestyle pilots needed.

Description
The CrazyF411 ELRS flight controller comes with integrated UART 2-4G ExpressLRS receiver and 20A Blheli_s ESC(Bluejay firmware pre-installed) which could support 2-4s. Bigger Mosfet could support high to 20A currents would be better for 2-4S toothpick drone. And because the 2.-4G ExpressLRS receiver is equipped with the SX1280 radio frequency chip with high sensitivity, high packet rate and low latency, this flight controller is the one that all Race/Freestyle pilots needed. The built-in ELRS receiver is UART communication with MCU, its the same like Happymodel EP1 which you can update firmware by betaflight pass-through or WIFI, very simple.
The default firmware is ELRS V3.0.1

Binding procedure:
1. Supply power to the flight controller by plug USB, wait until the green LED on the FC is off, immediately turn off the power, and then repeat again the above steps. When the FC is powered on for the third time, the green LED light will start to double-flash, which means that the RX enters the binding mode.
2. Please make sure your ExpressLRS tx module firmware is v3.x.x. And go to ExpressLRS.lua from TOOLS menu of your radio transmitter. Then hit [Bind] to binding with the onboard ExpressLRS receiver. The green LED should blinking slowly first then turn to solid, that means binding was successfully. If the green led still keep double flash after binding ,please change Model Match tab value from off to on or from on to off.

Receiver LED status meanings:
Green LED solid means bind successful or RC link established; Green LED double-flash means get into bind mode; Green LED flash slowly means no RC signal input from TX module; Green LED continuous flash fast means ExpressLRS wifi enabled.

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