BETAFPV ELRS Nano Rx
The BETAFPV Nano receiver is based on the ExpressLRS project, an open source RC link for RC applications. ExpressLRS aims to achieve the best possible link performance in terms of speed, latency and range. This makes the ExpressLRS one of the fastest RC links available while still offering long-range performance.
For micro drones, I highly recommend the smaller Lite receiver.
Specifications
- Weight: 0.7g (receiver only)
- Size: 12mm*19mm
- Telemetry power: 20dbm (100mW, 2.4G version)
- Frequency bands (2.4G Nano receiver version): 2.4GHz ISM
- Frequency bands (915MHz/868MHz Nano receiver version): 915MHz FCC/868MHz EU
- Input voltage: 5V
- Antenna connector: IPEX MHF
Diagram
Schematic of the 2.4G version of the Nano receiver as shown below.
Schematic of the 868 MHz/915 MHz nano receiver version as shown below.
Note: The firmware version of the receiver and Nano module produced by our company is ELRS 1.0.0-RC5 (the fifth test version before release);
The ELRS Innovative team has officially released version 1.0.0. Depending on the version, we have some updates:
- The 2.4G Nano TX module supports a refresh rate of 500Hz;
- Short press the button on the Nano module 3 times to enter the binding state.
We suggest our customers update their modules and ELRS version of receivers to 1.0.0. Significantly, the module and receiver must be in the same ELRS version, otherwise the frequency cannot match properly.
Learn more about ExpressLRS
ExpressLRS is an open source RC link for RC applications. Everyone could find this project on Github or join the Facebook Group discussion.
ExpressLRS is based on Semtech Lora Hardware SX127x or SX1280 for RX and TX respectively. aims to achieve the best possible link performance in both speed, latency and range. At 900 MHz a maximum packet rate of 200 Hz is supported. At 2.4 GHz an incredible 500Hz is currently supported with a custom OpenTX build. This makes the ExpressLRS one of the fastest RC links available while still offering long-range performance.
More and more vendors start to support ExpressLRS radio protocol in different parts, such as radio transmitter with ELRS in stock, drone with integrated ELRS receiver, ELRS TX module for JR housing or Nano housing. The BETAFPV team takes part in this project and provides a set of ExpressLRS components.
Setup and binding
ExpressLRS uses the Crossfire Serial Protocol (AKA CRSF protocol) to communicate between the receiver and the flight controller board. So make sure your flight control board supports CRSF serial protocol. Next, we use the flight controller with Betaflight firmware to show how to set up the CRSF protocol.
The connection between the ELRS Nano receiver and the FC card is shown below.
Enable the corresponding UART (e.g. UART3 below) as Serial Rx in the "Ports" tab of Betaflight Configurator.
In the "Configuration" tab, select "Serial Receiver" in the "Receiver" panel and select "CRSF" as the protocol. Telemetry is optional here and will reduce the update rate of the stick due to the transmit slots used for telemetry.
The nano receiver could enter the binding state by turning power on/off three times.
- Plug and unplug the nano receiver three times;
- Make sure the LED is performing a quick double flash, which indicates that the receiver is in pairing mode;
- Make sure the RF TX module or radio transmitter enters link state, which sends link pulse;
- If the receiver has a solid light, it is bound.
Note: Bind once and the receiver will store the binding information. Turn it back on and connect successfully automatically.
These foldable TPU holders for the BETAFPV ExpressLRS 2.4G receiver were designed by Ridwan Hughes to be reusable and easily printable. You could download the STL file on Thingiverse .
Package Included
- 1 * BETAFPV ELRS Nano Receiver
- 1 * BETAFPV T Antenna
- 2 * Replacement Heat Shrink Tube
- 4 x 30AWG Silicone Hookup Wires (1 Black, 1 Red, 1 White, 1 Yellow)
- 1*1x4 pin header
- 1 * Nano Receiver User Manual
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| Receiver |
ELRS 868 MHz, ELRS 2.4G |
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