MATEKSYS VTX-Mini Video Transmitter 5.8G User Guide

Video Transmitter 5.8G VTX-mini
QUICK START GUIDE

40CH(A/B/E/F/R Band), E4 & E8 are disabled by default.
Any Frequency/band can be disabled or enabled by CLI command
Variable Output Power: PIT, 25, 200, 400, 800mW
Button control and LED indicators
CMS control(Tramp protocol) via FC Uart _Tx
Switchable VTX input power via FC PINIO
Constant full frequency band power
Clean powerup and frequency switching
Built-in microphone
Upgradeable firmware
Convertible 20 to 30mm mounting
Input voltage: 6~36V(2~8S LiPo)
5V Output: 1A for Camera or FC
Power Consumption: 3.5W@ 800mW
Video-Input Impedance: 75 Ohm
Audio Subcarrier Frequency: 6.5 MHz
RF Connector: MMCX
Video Format: NTSC/PAL
Weight: 4.5g (VTX-mini only, w/o antanna)
Size1: 28284mm w/20mm_Φ3mm mounting
Size2: 36365mm w/30.5mm_Φ3mm mounting
Includes
1x 5.8G Video transmitter VTX-mini
1x MMCX 5.8G whip antenna, 8cm
1x 20mm to 30.5mm conversion plate

LAYOUT

IN: 6~36V DC (2~8S LiPo)
G: Ground
5V: onboard 5V regulator, output 1A for camera and FC.
Vid: Video signal
Tlm: CMS control(Tramp protocol) via FC Uart_TX
PINIO: VTX power switch via FC PINIO
Aud: Audio(A6.5) input, onboard microphone share this rail.
TX/RX: for flashing firmware and VTX firmware setting

Frequency Table (MHz)

*** E4(5645) & E8(5945) are disabled by default.

Frequency Selection (Button)

Press Button A to select the Group, Press B to select parameters in each Group.
When LED blinks, Group & parameter can be changed
New Frequency & Power will be saved if no button action within 5 seconds.
The VTX remains the current frequency until new setting is saved.
PIT mode: Press B to enter PIT mode(1mw output), Pit LED blinks
Press B again to quit PIT mode

PINIO Power switch

Any unused RX/TX/motor/PWM pad can be remapped for PINIO in BetaFlight
e.g. F405-CTR TX3 is used for CMS control, connect PINIO pad to RX3 of F405-CTR

CLI resource to locate RX3 pin name
RX3 pin is C11 then
resource SERIAL_RX 3 none
resource PINIO 1 C11
set pinio_box = 40
save

Go to the modes tab and Assign an AUX channel to the USER1 mode. Click SAVE.
Flip the switch and test

Tips
If FC has PINIO power switch built-in, e.g. F722-SE, F722-mini, no need to use this VTX PINIO function.
VTX PINIO would cut 5V output, so don’t power your FC via the VTX 5V pad if you want to use this function.

CMS control

Protocol: Tramp(TR)
*** CMS would override the button control if CMS control is enabled.

TR power level vs VTX power level
TR PIT — VTX PIT
TR 25 — VTX 25mw
TR 100 — VTX 200mw
TR 200 — VTX 200mw
TR 400 — VTX 400mw
TR 600 — VTX 800mw

CLI
vtx_low_power_disarm = OFF
Allowed values: OFF, ON, UNTIL_FIRST_ARM
If ON and the flight controller is disarmed, the video transmitter output power will be set to 25mw
Otherwise, the video transmitter output power will be set to the configured value.

VTX CLI command

1. Connect VTX TX/RX to one of FC UART VTX RX to FC TX, VTX TX to FC RX, Common ground

2. Connect FC USB to your computer

3. Connect FC to BF configurator

4. Power ON VTX

5. Type Serialpassthrough code in CLI & press the keyboard “Enter”
   If using the FC UART1, Type “Serialpassthrough 0 115200” ……
   If using the FC UART6, Type “Serialpassthrough 5 115200”
   *** Following command is in VTX firmware,
   It is not related to BF command

6. Type “help” after FC forward the port

7. Type “config list” to check VTX setting
   E4_5645 and E8_5945 are disabled by default

8. Type “set freq 5645 = enable” to enable E4
   Type “set freq 5945 = enable” to enable E8

9. You can also enable/disable whole band e.g. “set band A = to disable”

10. If Freq/band is disabled, button control will jump over it.

11. Unplug USB & battery, Serialpassthrough mode will be invalid.

Firmware Update

USB-TTL module

1. Set VTX power output to 25mW
2. Connect VTX(5V/G/RX/TX) to USB-TTL module(5V/G/TX/RX)
3. Connect USB to your computer, make sure USB-TTL PC driver is installed
4. open MatekConfigurator.exe
5. select the COM port of your USB-TTL module
6.  Click “Connect”
7. Once connected. CLI will display “Bootloader version:…….”
8.  Click “OpenFile” , then select “vtx_mini_app_v1.x.x.bin”
9. Click “Upgrade”
10. Once new firmware is uploaded, new firmware version will display in CLI

FC Serialpassthrough

1. Connect VTX_RX to FC spare UART_TX,
   VTX_TX to FC spare UART_RX
   VTX power(IN and G) to power source on FC

2. Connect FC USB to your computer

3. Connect FC to Betaflight configurator

4. Power ON VTX

5.  Type Serialpassthrough code in CLI & press keyboard “Enter”
   If using FC UART1, Type “Serialpassthrough 0 115200”……
   If using FC UART6, Type “Serialpassthrough 5 115200”

6. Keep USB connected to PC, Disconnect Flight controller from configurator

7. open MatekConfigurator.exe

8. select COM port of your Flight controller

9. Click “Connect”

10. Once connected. CLI will display VTX “Bootloader version:…….”

11. Click “OpenFile” , then select “vtx_mini_app_v1.x.x.bin”

12. Click “Upgrade”

13. Once new firmware is uploaded, new firmware version will display in CLI

14. Power cycle to exit Serialpassthrough

References

• Matek Systems – Advanced Drone Systems

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