BetaFPV ELRS 2.4G Micro TX Module – 500mW
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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.
Specification
- Item: ELRS Micro TX Module
- 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
| 2.4GHz 1W | 2.4GHz 500mW | 915/868 MHz 500mW | |
| Packet refresh rate | 50Hz, 150Hz, 250Hz, 500Hz | 50Hz, 150Hz, 250Hz, 500Hz | 25Hz, 50Hz, 100Hz, 200Hz |
| RF output power | 25mW, 50mW, 250mW, 500mW, 1W | 25mW, 50mW, 250mW, 500mW | 100mW, 250mW, 500mW |
| Frequency bands | 2.4GHz ISM | 2.4GHz ISM | 915MHz FCC 868MHz EU |
| Heat sink | Included | Not included | Not included |
| Backpack Function | Support | Not support currently | Not support currently |
Diagram
BETAFPV Micro RF TX module is compatible with the radio transmitter which has the micro module bay (AKA JR/SLIM module bay, e.g. Frsky Taranis X9D, TBS Mambo). Below is the diagram for the 500mW version module.
Note: Please assemble the antenna before powering it on. Otherwise, the PA chip in the Micro TX module will be damaged permanently.
Note: Please DO NOT use a 3S or above battery to power up the TX module via the XT30 port. Otherwise, the power supply chip in the TX module will be damaged permanently.
Note: Please do not turn on all DIP switches at the same time. You can refer to the chart to know about DIP switches on/off based on different uses.
| 1-2 DIP switches | 3-4 DIP switches | 5-6-7 DIP switches | |
| Update Firmware | ON | OFF | OFF |
| Operating Mode | OFF | ON | OFF |
| Update Backpack | OFF | OFF | ON |
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.
BETAFPV Micro TX Module ELRS V2.0.0 firmware is published. The firmware does not include the Binding Phrase. So please make sure the receiver works on the official major release V2.0.0 protocol and no Binding Phrase set.
- Support 5D buttons and the OLED menu with the official ELRS 2.0.0 release.
- The color of the LED changes automatically according to the system status.
- Other new and various features are fully synchronized with the official ELRS 2.0.0.
- When entering the OLED menus page with long pressing, the connection between the RF TX module and receiver works normally. Please do not change the Pkt Rate, otherwise, you must re-power the receiver.
https://github.com/BETAFPV/ExpressLRS
The user manual of How to Flash Firmware of ELRS RX/TX.
You could all use the ELRS official firmware V2.0-RC2 now, but lost the function of OLED and Joystick. We will work with the ELRS dev team and make the ELRS official firmware support the full functionality of the Micro TX Module. For the milestone, OLED will be supported in V2.1 officially.
https://github.com/ExpressLRS/ExpressLRS
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 the master-betafpv-oled-menu branch locally from Github.
Second, open the ExpressLRS Configurator and load the unzip source code locally. 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.
