BETAFPV Micro TX User manual

Micro TX Module
Welcome to ExpressLRS!
User Manual V2.0

BETAFPV Micro RF TX module is based on ExpressLRS project,
open source RC link for RC applications. ExpressLRS aims to
achieve the best possible link peormance in both speed, latency
and range. This makes ExpressLRS become one of the fastest RC
links available while still oering long-range peormance.
Github Project Link: https://github.com/ExpressLRS
Facebook Group: https://www.facebook.com/groups/636441730280366
The ExpressLRS ocal project does NOT suppo the OLED function for the
moment. BETAFPV team has made a pull request on Github and wait for the
ocal to nish this merge. Please get the rmware from BETAFPV Github
nowadays until ExpressLRS ocal suppo.
https://github.com/BETAFPV/ExpressLRS
● Frequency bands ( 2.4GHz version): 2.4GHz ISM
● Frequency bands ( 915MHz/868MHz version): 915MHz FCC/868MHz EU
● RF output power:
25mW/50mW/100mW/250mW/500mW (2.4GHz 500mW version)
25mW/50mW/100mW/250mW/500mW/1W (2.4GHz 1W version)
100mW/250mW/500mW (915MHz/868MHz 500mW version)
● Packet refresh rate: 50Hz/150Hz/250Hz/500Hz (2.4GHz)
25Hz/50Hz/100Hz/200Hz (915MHz/868MHz)
● Input voltage: 5-12V (2S)
● USB po: Type-C
Specifications
XT30 Po(2S) USB Type-C
Fan+RGB
5D Button
OLED Screen
GH1.25 (GND, 5V, CRSF)

● Frequency bands ( 2.4GHz version): 2.4GHz ISM
● Frequency bands ( 915MHz/868MHz version): 915MHz FCC/868MHz EU
● RF output power:
25mW/50mW/100mW/250mW/500mW (2.4GHz 500mW version)
25mW/50mW/100mW/250mW/500mW/1W (2.4GHz 1W version)
100mW/250mW/500mW (915MHz/868MHz 500mW version)
● Packet refresh rate: 50Hz/150Hz/250Hz/500Hz (2.4GHz)
25Hz/50Hz/100Hz/200Hz (915MHz/868MHz)
● Input voltage: 5-12V (2S)
● USB po: Type-C
ExpressLRS uses the Crossre serial protocol (AKA CRSF
protocol) to communicate between the radio transmitter and
the RF TX module. So make sure your radio transmitter suppo
the CRSF serial protocol. Next, we use the radio transmitter with
OpenTX system to show how to setup the CRSF protocol and
LUA script.
Basic Conguration
BETAFPV Micro RF TX module is compatible with radio transmit-
ter 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 RF TX module will be damaged permanently.
Note: Please DO NOT use 3S or above bette to power up the TX module.
Otherwise, the power supply chip in the TX module will be damaged
permanently.
SMA-KE Po
NC
CRSF Serial Po
5V-12V
DIP Switch
GND
1
ON DIP
234 5 6 7

ExpressLRS uses the CRSF serial protocol to communicate
between the radio transmitter and the RF TX module. To set this
up, in OpenTX system, enter into model settings, and on the
"MODEL SETUP" tab, turn o the "Internal RF". Next enable
"External RF" and select "CRSF" as the protocol.
CRSF Protocol
ExpressLRS use the OpenTX LUA script to control the RF TX
module, like bind or setup.
● Save the ELRSV2.lua script les onto the radio transmitter's
SD Card in the Scripts/Tools folder;
● Long press the "SYS" button (for RadioMaster T16 or similar
radios) or the "Menu" button (for Frsky Taranis X9D or similar
radios) to access the Tools Menu where you can nd ELRSV2.lua
script ready to run with only one click;
● Below image show the LUA script run successfully.
LUA Script
MODEL SETUP
Use global funcs
Internal RF
Mode
External RF
Mode
Channel Range
Receiver
OFF
CRSF
CH1-16
00
2/14

● With the LUA script, pilot could check and setup some
congurations of the RF TX module.
Note: The newest ELRSV2.lua script le is available in BETAFPV Suppo
website (Link in More Information Chapter).
0/200
Packet Rate
Telem Ratio
>TX Power
>VTX
Administrator
>WiFi
Connectivity
BLE Joystick
On the top right. Indicator which tells how many bad
UART packets and how many packets it's getting from
the radio per second.
RF transmitter packet rate.
Receiver telemet ratio.
Set the RF TX module output power and the fan
threshold value.
Set the VTX parameter of FC and goggles which have
bound with RF TX module.
Open the WiFi function of RF TX module or receiver,
for rmware update.
Open the bluetooth funtion, and enable BLE mode.
Bind Set the RF TX module into binding status.
Packet Pate
Telem Ratio
Switch Mode
Model Match
>TX Power
>VTX Administrator
>WiFi Connectivity
2 .0 .0 2b70c5
[BLE Joystick]
[Bind]
200(-112dbm)Hz
"BETAFPV 2400TX Micro"
1:64
Hybrid
Off
0/200

Note: When the RF TX module enters WiFi Upgrade status, the button will be
invalid. Please re-power the RF TX module after rmware update via WiFi.
There is a 5D button on the micro module. Below is the basic
operation of the button and OLED.
Long Press: Unlock and enter the menu page, or apply current
settings in the menu page.
Up/Down: Move to the last/next row.
Left/Right: Change the value of this row.
Sho Press: Enable binding status or WiFi upgrade status.
Button and OLED
Note：You must re-power the receiver if you have changed the Packet Rate.
Sho Press:
Enable binding status
or WiFi upgrade status.
Up/Down:
Move to the last/next row.
Long Press:
Enter the menu page
or apply current settings
and lock.
Left/Right:
Change the value of this row.

Note: The LED will NOT ash when enter binding status. The module will exit
from binding status 5 seconds later automatically.
Note: If you reash rmware of the RF TX module with your own Binding
Phrase, please make sure the receiver has the same Binding Phrase. The RF TX
module and the receiver will bind automatically in this situation.
The Micro RF TX module comes with ocally major release
V2.0.0 protocol and no Binding Phrase inlcuded. So please make
sure the receiver works on ocally major release V2.0.0
protocol. And no Binding Phrase setted.
Micro RF TX module could enter binding status via ELRSV2.lua
script, as description in "LUA Script" chapter.
Besides, using the button and OLED, move to the Bind position
and sho press the button. Then the RF module will enter
binding status.
Bind
Pkt.rate
TLM Ratio
Power
RGB
500hz
1:128
100mW
Auto
Update
ExpressLRS
Bind
Sho press the button.
Then the RF module will enter binding status.

Note: The RGB LED will NOT change according to the output power. When the
output power is threshold value(default 250mW) or above, the fan will spin
automatically.
Micro RF TX module could switch the output power via
ELRSV2.lua script, as description in "LUA Script" chapter. Besides,
using the button and OLED, move to the Power position. Push the
button to the left/right could switch the output power.
Output Power Switch
As ExpressLRS project is still in frequently update, please check
BETAFPV Suppo (Technical Suppo -> ExpressLRS Radio Link)
for more details and newest maunal.
https://suppo.betafpv.com/hc/en-us
● Newest user manual;
● How to upgrade the rmware;
● FAQ and troubleshooting.
More Information
RGB
Pkt.rate
TLM Ratio
Power
500hz
1:128
Auto
Update
ExpressLRS
Bind
100mW
Push left/right could switch the output power.