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
