Take your FPV and UAV experience to the next level with the EBYTE EWM700 Series ExpressLRS (ELRS) Receiver Modules. Designed for ultra-low latency and exceptional long-range performance, these open-source receiver modules integrate industry-leading RF chips (SX1276 and SX1281) into an incredibly compact form factor. Operating on a wide voltage range of 3.3V to 5.5V, the EWM700 series provides seamless UART connectivity and robust signal penetration. Whether you are building an ultra-light micro-drone for indoor racing or a long-range fixed-wing aircraft, the EWM700 series delivers the rock-solid reliability that modern pilots demand.
Core Features
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Open-Source ELRS Protocol: Built for the highly popular ExpressLRS ecosystem, ensuring low latency, high refresh rates, and active community support.
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Premium RF Hardware: Equipped with genuine Semtech SX1276 (915MHz) and SX1281 (2.4GHz) chips for superior sensitivity and range.
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Ultra-Small Footprint: Highly integrated SMD design specifically engineered for tight builds and weight-sensitive aircraft.
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Wide Voltage Input: Supports 3.3V~5.5V DC, easily integrating with the 5V pads on nearly all modern flight controllers.
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Universal UART Interface: Communicates via standard UART (CRSF protocol), offering plug-and-play compatibility with Betaflight, INAV, and ArduPilot.
| Specification | EWM700-2G4T12SXE | EWM700-900T20DXN | EWM700-2G4T20DXN |
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| Chip Solution | ESP8285 + SX1281 | ESP8285 + SX1276 | ESP8285 + SX1281 |
| Frequency Band | 2.4GHz | 915MHz | 2.4GHz |
| Protocol | CRSF | CRSF | CRSF |
| Host Interface | UART | UART | UART |
| Nominal TX Power | 12dBm (15.8mW) | 20dBm (100mW) | 20dBm (100mW) |
| Transmit Current | ≈60mA | ≈141mA | ≈165mA |
| Receive Current | ≈33mA | ≈33mA | ≈37mA |
| Antenna Connector | 2.54mm Stamp-hole | 2.54mm Punch holes | 2.54mm Punch holes |
| Dimensions | 12.0 × 12.0 × 3.3mm | 18.0 × 12.0 × 3.5mm | 18.0 × 12.0 × 3.5mm |
| Weight | 0.7g | 1.1g | 1.0g |
| Operating Voltage | 3.3V – 5.5V DC | 3.3V – 5.5V DC | 3.3V – 5.5V DC |
Product Manual Download
Customer Use Cases
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EWM700-2G4T12SXE:
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Industry & Environment: Indoor FPV Drone Racing (Tiny Whoops).
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Usage: In highly competitive indoor drone racing, every gram matters, and latency must be practically zero. Pilots solder the ultra-lightweight EWM700-2G4T12SXE directly to their micro flight controllers. The 2.4GHz ELRS protocol ensures that control inputs are transmitted at rapid refresh rates (up to 500Hz+), allowing for pinpoint accuracy when navigating tight gates in gymnasiums or abandoned buildings.
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EWM700-2G4T20DXN:
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Industry & Environment: Professional FPV Cinematic Filming and Freestyle.
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Usage: A cinematic drone operator flying a 5-inch or 7-inch quadcopter around abandoned structures or construction sites needs reliable control. They use the EWM700-2G4T20DXN for its 20dBm power output, which provides a comfortable safety buffer against signal drops. The 2.4GHz band keeps the antenna size small and manageable while delivering exceptional responsiveness for acrobatic maneuvers.
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EWM700-900T20DXN:
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Industry & Environment: Agricultural & Long-Range Surveying UAVs.
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Usage: Operating a large fixed-wing mapping drone over vast farmlands or dense forests requires extreme signal penetration. The operator installs the EWM700-900T20DXN module. Utilizing the lower 915MHz frequency and LoRa modulation, the signal easily punches through foliage and maintains a robust link miles away from the pilot, ensuring the expensive survey equipment returns home safely.
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FAQ
Q1: What is the operating voltage of the EWM700 series modules?
A: The EWM700 series operates on a wide DC voltage range of 3.3V to 5.5V. This makes it incredibly convenient to install, as you can power it directly from the standard 5V or 3.3V output pads found on almost all modern Betaflight, INAV, and ArduPilot flight controllers without needing an external BEC.
Q2: How do I configure and flash firmware to these modules?
A: Because these modules are based on the open-source ExpressLRS project, you can easily flash and update them using the official ExpressLRS Configurator. They can be updated via Betaflight Passthrough (using the UART connection) or via Wi-Fi if the ELRS firmware initiates Wi-Fi mode.
Q3: Which frequency should I choose for my drone: 915MHz or 2.4GHz?
A: Choose 2.4GHz (EWM700-2G4T models) if you want the lowest possible latency, highest refresh rates, and a small antenna—perfect for racing, freestyle, and everyday FPV. Choose 915MHz (EWM700-900T20DXN) if you prioritize long-range flying and obstacle penetration (like flying behind trees or hills), which is ideal for fixed-wing and long-range cruisers.
Q4: How do I connect the module to my flight controller?
A: The EWM700 modules use a standard UART interface. You simply need to solder 4 wires: 5V (or 3.3V) to Power, GND to Ground, module TX to a free UART RX on the flight controller, and module RX to the corresponding UART TX. Inside your flight controller software, set the receiver protocol to CRSF.
Q5: What is the expected control range of these ELRS modules?
A: ExpressLRS utilizes Semtech's LoRa technology, offering industry-leading range. In clear Line of Sight (LoS) conditions, the 2.4GHz modules can achieve several kilometers of range with a solid link quality. The 915MHz module can easily reach tens of kilometers under optimal conditions, vastly outperforming traditional 2.4GHz RC links.
