BETA FPV ELRS Lite Rx
The BETAFPV Lite 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 ExpressLRS one of the fastest RC links available while still offering long range performance.
Nano RX or Lite RX
What is the main difference between Nano receiver and Lite receiver?
The Nano receiver (2.4G version) is the first and (so far) the only receiver with a power amplifier (PA+LNA). It has a telemetry output of 100mW and better sensitivity when at long range. The Lite receiver does not have a PA/LNA, so its telemetry power is that of the SX1280 RF chip with 17mW.
Additionally, the Nano receiver comes with a regular external T-dipole antenna. The Lite receiver has a SMD ceramic antenna and in theory it is not as long range.
I highly recommend the Nano receiver if space is sufficient. On 65-85mm whoop drones with limited space and needing light weight, the Lite receiver is a better choice.
Specification
- Weight: 0.47g (with SMD Tower ceramic antenna), 0.53g (with SMD flat ceramic antenna)
- Size: 10mm*10mm*6mm(tower), 11mm*10mm* 3mm (flat)
- MCU: ESP8285
- Telemetry power: 17 mW
- Frequency bands (2.4G Nano receiver version): 2.4GHz ISM
- Input voltage: 5V
- Antenna: Integrated SMD ceramic antenna
Characteristics
Tower antenna or flat antenna
The new Lite receiver with flat antenna features an ultra-thin 3mm board and a light weight of 0.53g, which requires less mounting space on drones with limited space. In addition, a solid flat antenna without irregular parts can withstand impacts, making the receiver not so fragile.
Regardless of the tower antenna or flat antenna, both versions perform well in terms of control, range and stability, providing pilots with a good flight experience. Below the table is the basic information for two antennas. It is proved that both antennas have almost the same performance in gain. However, the efficiency for flat antenna is better than tower antenna. Despite this, tower antenna and flat antenna can achieve the range of about 600m using TX with the same output power and frequency.
Diagram
Lite Receiver with 2.4G version tower antenna diagram as shown below.
Lite receiver with 2.4G flat antenna version scheme as shown below.
Note: The firmware version of the Lite receiver produced by our company is ELRS 1.0.0; ELRS Innovative team officially released version 1.2.0, which is not compatible with version 1.0.0. We suggest our customers to update the ELRS version of this receiver to 1.2.0 if necessary. Significantly, the TX module and the receiver must be in the same ELRS version, otherwise the frequency can not match properly.
Note: Please update via cable if you flash ELRS V1.1.0 firmware on Lite receiver. Otherwise, Lite receiver will enter boot loop if updated ELRSV1.1.0 via WIFI.
Learn more about ExpressLRS
ExpressLRS is an open source RC binding for RC applications. Everyone could find this project on Github or join the discussion in Facebook Group .
ExpressLRS is based on Semtech Lora Hardware SX127x or SX1280 for RX and TX respectively. It aims to achieve the best possible link performance in both speed, latency and range. At 900MHz a maximum packet rate of 200Hz is supported. At 2.4GHz a whopping 500Hz is currently supported with a custom OpenTX build. This makes ExpressLRS one of the fastest RC links available while still offering long range performance.
More and more suppliers are starting to support the ExpressLRS radio protocol in different parts, such as a radio transmitter with ELRS in stock, a drone with integrated ELRS receiver, ELRS TX module for JR housing or Nano housing. The BETAFPV team is taking part in this project and provides a series of ExpressLRS components.
Configuration and Electrical Diagram
ExpressLRS uses the Crossfire serial protocol (AKA CRSF protocol) to communicate between the receiver and the flight controller board. So make sure your flight controller board supports the CRSF serial protocol. Next, we use the flight controller with Betaflight firmware to demonstrate how to set up the CRSF protocol.
The connection between the ELRS Lite receiver and the FC board 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 stick update rate due to the transmission slots used for telemetry.
The Lite receiver comes with the officially major release V1.1.0 protocol and without Binding Phrase included. The Lite receiver could enter binding state by turning on/off three times.
- Plug and unplug the Lite receiver three times;
- Make sure the LED is double-blinking quickly, which indicates the receiver is in pairing mode;
- Make sure the RF TX module or radio transmitter enters the linking state, which sends out a linking pulse;
- If the receiver has a solid light, it is locked.
Note: Binding once and the receiver will memorize the binding information. Power on again and connect successfully automatically.
Note: If you update the receiver firmware with your own binding phrase, make sure the TX module has the same binding phrase. The RF TX module and the receiver will automatically connect in this situation.
Download BETAFPV ELRS Nano Receiver User Manual. (Please use the same manual as your Nano Receiver).
Package Included
- 1 * BETAFPV ELRS Lite Receiver Tower Antenna
- 2 * Replacement Heat Shrink Tube
- 4 x 30awg silicone jumper wires (1 black, 1 red, 1 white, 1 yellow)
or
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