Queclink GL521MG - Interface Definition

GL521MG User Manual
QSZTRACGL521MGUM0100
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3. Interface Definition
GL521MG has an internal 4-pin connector. It can be used to configure the device. The definition
of the pins is in the following table.
Figure 3. 4-pin Connector of the GL521MG
Table 8. Description of 4-pin Connections
Index
Pin Name
Description
1
USB_5V
Not used
2
RXD
MCU UART RXD
3
TXD
MCU UART TXD
4
GND
Power and digital ground