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FPV Electronics > VTX & Receiver
The ELRS 915MHz Receiver leverages the ExpressLRS open-source protocol to deliver ultra-low latency (<10ms) and extended-range communication (10km+) for FPV drones and UAVs. Operating in the 915MHz ISM band, it excels in environments with obstacles or interference, utilizing high-power telemetry (up to 500mW) and a temperature-compensated crystal oscillator (TCXO) for frequency stability. The compact design and robust RF performance make it ideal for long-range exploration, agricultural surveying, and industrial applications requiring reliable control in challenging conditions:cite[1]:cite[4].
| Parameter | Specification |
| Protocol | ExpressLRS 3.x (Open Source) |
| Frequency Band | 915MHz (FCC) / 868MHz (EU) |
| Latency | 1–10ms (Adjustable) |
| Max Refresh Rate | 200Hz |
| Telemetry Power | 500mW (Max) |
| Input Voltage | 5V DC ±10% |
| Range | >10km (Line-of-Sight) |
| Antenna Connector | IPEX1/U.FL |
| Weight | 1.8g (Excluding Antenna) |
| Dimensions | 13×23×5.5mm |
| Interface | SBUS/CRSF |
• High-Power Telemetry: 500mW output for robust long-range downlink:cite[1].
• TCXO Stability: ±0.5ppm frequency drift tolerance (-40°C to +85°C):cite[1]:cite[2].
• WiFi OTA Updates: ESP8285 chip enables wireless firmware upgrades via ExpressLRS Configurator:cite[1]:cite[5].
• CNC Aluminum Housing: Enhances heat dissipation and structural durability:cite[1].
• Dual PA+LNA Amplifiers: Boosts signal sensitivity and noise immunity:cite[4].
• Fail-Safe Modes: Configurable hold/land/return-to-home on signal loss.
• IPEX1 Antenna Port: Compatible with flexible monopole or ceramic antennas.
| Range | Packet Rate | Latency | Environment Suitability |
| <1km | 200Hz | 1–2ms | Urban/Racing |
| 1–5km | 100Hz | 4ms | Suburban/Freestyle |
| >5km | 50Hz | 10ms | Open Field/Long-Range |
| Tested with 915MHz transmitter @500mW telemetry power:cite[1]:cite[4] |
• Mountain surfing (>10km range with directional antennas)
• Autonomous waypoint missions (e.g., LiDAR mapping)
• Crop monitoring with multispectral sensors
• Pesticide spraying control systems
• Power line/pipeline surveys
• Solar farm thermal imaging
• Obstacle-dense environments (e.g., forests/urban areas)
• HD analog/digital video systems (DJI, Walksnail):cite[4]
• Operating Voltage: 5V DC (3.5–5.5V range):cite[1]
• Temp Range: -40°C to +85°C (85% non-condensing humidity):cite[1]:cite[2]
• Power Consumption: 120mA @5V (200Hz mode):cite[5]
• EMI Shielding: Tolerates 6S ESC noise ≤25dBμV
• Water Resistance: Conformal-coated PCB (IP54 equivalent)
• Storage: -30°C to 60°C in ESD-safe packaging