Mainlink MK22 User manual

MK22/MK55
Long-range Wireless Transmission System
User's Manual V1.0 2022.10
Introduction / Installation Guide / Instruction

Version：V1.0（2022.10）
Copyright © 2022 Mainlink All Rights Reserved
2
Disclaimer
Please read the user's manual carefully before use. Be sure to pay attention to the
warnings and understand all points completely.
Please strictly abide by the local radio frequency management regulations.
Please follow the installation steps in the manual to use this product. Our company
and agent will not take legal responsibility for the damage of equipment or personnel
caused by the installation and modification of users.
This copyright of this manual belongs to Great Mainlink Tech Co., LTD. No one may
make copies without written consent.
Caution
Attention to installation
1. Before power on, make sure the antenna connection is reliably . Otherwise, it will cause
damage to the device.
2. Make sure that the voltage is within the range of use.
3. Please pay attention to the EMC of all the electronic equipment on your drone.
4. It is recommended that the antenna should be installed downward and keep the antenna
away from the metal on the drone.
5. Make sure to use the matching antenna.
Before use
1. Make sure that all cables are connected correctly and firmly.
2. No foreign objects (e.g. liquids, sand, etc.) can be entered inside the device.

Version：V1.0（2022.10）
Copyright © 2022 Mainlink All Rights Reserved
3
3. It takes 15 seconds for the device to start. Video and data cannot be transferred until the
device has finished booting.
4. Please ensure that the environment in which the equipment is used is free of other
electromagnetic interference.
5. When the signal weakens, you can improve the effect by changing the heading direction
of the antenna.
Get instructional video
In order to use the system correctly, you can get the instructional
Video at the following address:
https://mainlinkaero.com/cn/video/video-main.html
Download Maestro Assistant
Download the software at the following address：
https://mainlinkaero.com/cn/download/download-main.html

Version：V1.0（2022.10）
Copyright © 2022 Mainlink All Rights Reserved
4
CONTENTS
Disclaimer................................................................................................................................ 2
Caution..................................................................................................................................... 2
Attention to installation..............................................................................................2
Before use.......................................................................................................................2
Get instructional video ................................................................................................3
Download Maestro Assistant.................................................................................. 3
Packing list ...............................................................................................................................6
Overview.................................................................................................................................. 8
Features.................................................................................................................................... 9
MK22 Interface Description..............................................................................................10
Installation............................................................................................................................. 14
Air .................................................................................................................................... 14
Ground .............................................................................................................................14
1.Connect the antenna ....................................................................................... 15
2. Connect to the Ground Station................................................................ 15
MK22 Instruction ...................................................................................................................... 16
Quick start .................................................................................................................... 16
MK22 with CODEC module MF05 ..........................................................................18
.........................................................................................................................................19
MK22 with Mission Planner .....................................................................................19
Improve RC controller distance through SBUS..................................................23
Maestro Assistant................................................................................................................ 25
Interface of Maestro Assistant................................................................................25
How to use Maestro Assistant................................................................................26
1. Connect MK22 with Maestro Assistant. .......................................................26
2. Read current parameter。.............................................................................27
3. Configurations...............................................................................................27
MK22 Web UI Configuration Description..................................................................... 30

Version：V1.0（2022.10）
Copyright © 2022 Mainlink All Rights Reserved
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Login.............................................................................................................................. 31
Setting........................................................................................................................... 32
System update............................................................................................................ 38
Wireless pair................................................................................................................ 39
Language...................................................................................................................... 40
Advanced User Display ............................................................................................. 40
Specification ......................................................................................................................... 44
FAQ.......................................................................................................................................... 46

Version：V1.0（2022.10）
Copyright © 2022 Mainlink All Rights Reserved
6
Packing list
Device
Ground Air
Accessories
2Pin XT30 cable
×1
2Pin cable
×1
For Power
For pairing and reset
3Pin cable
×5
4Pin cable
×2
For UART and SBUS
For Ethernet
Short Antenna
×2
Fiber-glass antenna
×1

Version：V1.0（2022.10）
Copyright © 2022 Mainlink All Rights Reserved
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For air unit
For ground unit
Long Antenna
×2
RF feeder
×2
For air unit
For air unit to UVA
19Pin cable
×1
For Ethernet and Power_Out

Version：V1.0（2022.10）
Copyright © 2022 Mainlink All Rights Reserved
8
Overview
Industry drone market is developing very fast in recent years. The fight time and
distance of drones are getting longer and longer. MK22/MK55, a long-range wireless
transmission system, is designed for VTOL fixed wing and other long-range drones. The
system can transmit video, fight control data, gimbal control data, and RC data
simultaneously. With the advantage of high level intergration and powerful function,
MK22/MK55 is a typical good product to meet long-range transmission requirements.
There are two frequency bands——800MHz、1.4GHz and 2.4GHz. Users can choose
according to their needs. Please choose the suitable frequency band according to local
regulations.
MK22 can transmit data and video to 22km, MK55 can transmit data and video to
55km, making it very suitable for long range drone.
If you use our recommend ground station, you only need one cable with
connector to connect the device and your ground station.
*1Test under LOS and no interference conditions。

Version：V1.0（2022.10）
Copyright © 2022 Mainlink All Rights Reserved
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Features
Long distance Modulation
-MK22 Up to 22km @ LOS - OFDM
-MK55 Up to 55km @ LOS
Video interface Data interface
- Ethernet *1 - UART（TTL/RS232）/SBUS，
Hopping/Fixed Frequency Frequency Band
-Fixed: user defined - 800MHz/1.4GHz/2.4GHz
-Hopping: automatic Working mode
BW - Air unit can be ：Point to point mode
-5/10/20 MHz Repeater mode
Work temperature Power range
- 40℃～+70℃- DC 9~28V Battery 3S~6S

Version：V1.0（2022.10）
Copyright © 2022 Mainlink All Rights Reserved
10
MK22 Interface Description
Air unit with side view
1. Ethernet
Number
Character
Description
Input/Output
1
T+
TX+
O
2
T-
TX-
O
3
R+
RX+
I
4
R-
RX-
I
2. UART1
Number
Character
Description
Input/Output
1
G
GND
I/O
2
R
RS232 RX
I
3
T
RS232 TX
O
3. UART2
Number
Character
Description
Input/Output
1
G
GND
O
2
R
TTL RX
I
3
T
TTL TX
O