Product overview
The Happymodel ELRS X2 AIO 2-4S combines flight control, an onboard four-in-one ESC and an SPI ExpressLRS receiver in an integrated electronics assembly for toothpick and long-range FPV drone builds. Its integration footprint uses a 25.5×25.5 M2 mounting pattern. The controller pairs an STM32F411CEU6 processor with an SPI-connected MPU-6000 sensor, while built-in Betaflight OSD and a 5V 1A BEC provide additional onboard functions. Flight-controller power is specified for a 2-4S LiPo battery.
The onboard ESC section uses the EFM8BB21 MCU and accepts 2-4S LiPo/LiPo HV power, listed as 7v/17v. Its current rating is 12A continuous, with a 15A peak limited to five seconds. BLHeliSuite programming and DSHOT150, DSHOT300 and DSHOT600 protocols are supported. The integrated 2.4GHz receiver uses an SX1280 RF chip and onboard SMD ceramic antenna, with selectable packet rates from 25Hz to 500Hz. It binds with an ELRS 2.4GHz transmitter module; the latest transmitter firmware is recommended.
Specifications
| Specification | Value & conditions |
|---|---|
| Product identity | Happymodel ELRS X2 AIO 2-4S flight controller |
| Intended application | Integrated flight-control electronics for toothpick and long-range FPV drone builds.For 2-4S toothpick drones or long-range FPV drones. |
| Flight-controller MCU | STM32F411CEU6 (100MHZ, 512K FLASH) |
| Sensor | MPU-6000 (SPI connection) |
| Mounting pattern | 25.5×25.5 M2 |
| Flight-controller power supply | 2-4S LiPo battery |
| Integrated ESC configuration | Built-in BLHeli_S ESCs, 12A each |
| On-screen display | Built-in Betaflight OSD (SPI control) |
| Integrated receiver | Built-in SPI ExpressLRS 2.4GHz receiver |
| BEC | Built-in 5V 1A BEC |
| Flight-controller firmware target | CRAZYBEEF4SX1280 |
| ESC MCU | EFM8BB21Onboard 4-in-1 ESC. |
| ESC power supply | 2-4S LiPo/LiPo HV (7v/17v)Onboard 4-in-1 ESC. |
| ESC current ratings | 12A continuous; 15A peak (5 seconds)Onboard 4-in-1 ESC; peak current limited to 5 seconds. |
| ESC programming | Programmable through BLHeliSuiteOnboard 4-in-1 ESC. |
| ESC factory firmware | F_H_40_REV16_8.HEXOnboard 4-in-1 ESC. |
| ESC default protocols | DSHOT150/DSHOT300/DSHOT600Onboard 4-in-1 ESC. |
| Receiver RF chip | SX1280Integrated 2.4GHz ExpressLRS receiver. |
| Receiver packet-rate options | 25Hz/50Hz/150Hz/250Hz/500HzOnboard SPI ExpressLRS receiver. |
| Receiver RF frequency | 2.4GHzOnboard SPI ExpressLRS receiver. |
| Receiver antenna | Onboard SMD ceramic antennaOnboard SPI ExpressLRS receiver. |
| Telemetry output power | Less than 12dBmOnboard SPI ExpressLRS receiver. |
| Receiver protocol | SPI ExpressLRSOnboard receiver. |
| Transmitter binding compatibility | Can bind with an ELRS 2.4GHz transmitter module.Latest ELRS firmware recommended for the transmitter module. |
| Voltage-meter scale setting | 110Onboard voltage meter. |
| Amperage-meter scale setting | 470Onboard amperage meter. |
