A compact, full-featured receiver for models that require advanced RF performance, telemetry, and connectivity in a space-efficient package. Compatibility: Compatible with all ExpressLRS transmitters and modules, including radios with built-in ELRS.
Features.
Dual-Band Gemini X (2.4GHz + Sub-G 900MHz).
3 PWM Outputs + Serial Support: Compact PWM output with CRSF and SBUS options.
External UART Port (Locking Connector): Dedicated interface for telemetry, external devices, and system expansion.
Independent Multi-Source Voltage Telemetry:Monitor up to two power sources simultaneously using dedicated ADC channels:EXT-V(up to70V),receiver supply voltage (V-PWM)(up to12V).
MMCX Antenna Connectors: Durable, replaceable antennas with a secure connection.
Wi-Fi Updates & WebUI: Configure and update directly without disassembly.
Durable Injection-Molded Housing: Compact, protective enclosure for long-term reliability.
At its core is the ExpressLRS system, built around dual Semtech LR1121 transceivers and a dual-band Gemini X RF architecture operating on both 2.4 GHz and Sub-G 900 MHz. Combined with up to 100mW telemetry output power, it provides a stable control link and enhanced telemetry performance for applications where reliable telemetry data is important.
With 3 PWM outputs, serial protocol support, and dual independent voltage telemetry channels, the ER3 PRO integrates easily into a wide range of aircraft and vehicle platforms. Dedicated ADC channels independently monitor receiver supply voltage (V-PWM) (up to 12V) and EXT-V (up to 70V), providing accurate telemetry for each voltage source. Locking connectors on the UART and EXT-V telemetry ports help ensure secure, reliable connections in demanding operating environments.
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