User's Manual

ALX420X User Manual
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11
2 UART Transparent
2.1 Connection Diagram
 These pins are very necessary on the module while connect with host and
OTA upgrade.
Figure 5 - Detail Connection
2.2 Set Up the Connection
1. Find Bluetooth connection icon
Figure 6 - Bluetooth Connection
TX
HOST
RX
GND
3.3v/5v
CTS
RTS
RX
420A
TX
GND
3.3v/5v
RTS
CTS