Uart Interface (J401) - Quectel Wi-Fi-M.2 EVB User Manual

Wi-Fi&Bluetooth Module Series
Figure 5: The Connection Between J301 and PC

3.4. UART Interface (J401)

Wi-Fi-M.2 EVB offers one UART interface J401 (debug UART) for Linux console and log output.
The block diagram of UART on Wi-Fi-M.2 EVB is shown as below.
J401
U402
Wi-Fi-M.2
3.3/1.8 V
1.8 V
Wi-Fi
3.3 V
USB 2.0
USB to UART
Voltage-level
USB Micro-B
module
Converter
Translator
Figure 6: UART Block Diagram
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