BETAFPV Micro RF TX module is based on the ExpressLRS project, an open-source RC link for RC applications. ExpressLRS aims to achieve the best possible link performance in both speeds, latency, and range. This makes ExpressLRS one of the fastest RC links available while still offering long-range performance.
- Packet refresh rate: 25Hz/50Hz/100Hz/200Hz (915MHz/868MHz), 50Hz/150Hz/250Hz/500Hz (2.4GHz)
- RF output power: 25mW/50mW/100mW/250mW/500mW (2.4GHz), 100mW/250mW/500mW (915MHz/868MHz)
- Frequency bands (Micro RF Module 2.4G version): 2.4GHz ISM
- Input voltage: 5V~12V
- XT30 port: 5V~12V, recommend 2S(8.4V) battery, DO NOT support 3S(12.6V) or above
- USB port: Type-C
BETAFPV Micro RF TX module is compatible with radio transmitter which has the micro module bay (AKA JR/SLIM module bay, e.g. Frsky Taranis X9D、TBS Mambo).
Note： Please assemble the antenna before power on. Otherwise, the PA chip in the Micro TX module will be damaged permanently.
Note： Please DO NOT use 3S or above battery to power up the TX module via XT30 port. Otherwise, the power supply chip in the TX module will be damaged permanently.
ABOUT THE FIRMWARE
The ExpressLRS official project on Github does NOT support the OLED function for the moment. BETAFPV team will work with the ELRS team and make the official repository support the OLED and button function ASAP.
Please get the firmware from BETAFPV Github nowadays until ExpressLRS official support. In BETAFPV branch, the ExpressLRS protocol is V1.1.0 and has NO binding phrase for the firmware.
How do I set a binding phrase on this Micro TX module when the ELRS official mainstream does not support OLED yet?
First, download the source code of master-betafpv-oled-menu branch to local from Github.
Second, open the ExpressLRS Configurator and load the unzip source code from local. Select the target device “BETAFPV 900/2400 TX Micro”. Now, you could set up your own binding phrase and other options as normal.
Third, build & flash.
KNOW MORE ABOUT EXPRESSLRS
ExpressLRS, using Semtech Lora SX127x or SX1280 hardware, strives for top link performance in speed, latency, and range. With speeds of 200 Hz at 900 MHz and 500 Hz at 2.4 GHz, it’s among the fastest RC links. Growing support from vendors includes ELRS in transmitters, built-in receivers, and modules. BETAFPV contributes to this project with various ExpressLRS components.
BUTTON AND OLED
The ELRS TX module could be configured via the OpenTX LUA script. With OLED and button, no-OpenTX radio controller that supports CRSF could use this ELRS Micro module easily. The following no-OpenTX radio controllers work well with this TX module. Futaba T16IZ, T16SZ and T18SZ (with update to 3.9e), Wsky ET16, Radiolink AT9S Pro.
There is a 5D button on the micromodule. Pay attention only to the vertical dimension works and the other four dimensions are invalid. Below is the basic operation of the button and OLED.
In the lock screen page, long press to unlock and enter the menu page.
In the menu page, long press to change the value of this row.
In the lock screen page, short press invalidly.
In the menu page, short press to move to the next row.
ExpressLRS use the OpenTX LUA script to control the TX module, like bind or setup. With the LUA script, pilots could check, and set up some configurations of the Nano RF TX module. For more details, please check the Support Page.
- Save ELRS.lua script files in the Scripts/Tools folder on the transmitter’s SD Card. On RadioMaster T16 or similar radios, long-press the “SYS” button, or on Frsky Taranis X9D or similar radios, long-press the “Menu” button to access the Tools Menu.
- The below image show, the LUA script run successfully;
BIND & OUTPUT POWER
- 1 * BETAFPV ELRS Micro TX module (500mW or 1Watt)
- 1 * BETAFPV Moxon antenna
- 1 * Micro TX module user manual
The antenna in the package is not the same as shown below for 915MHz and 868MHz versions.