User's Manual

4
1.6 Interface definitions
Figure 2 Module interface definition
27 NC NC
28 NC NC
29 NC NC
30 SYS_RST_N I Module reset, low level effective, reset time ≥ 500ms
31 NC NC
32 UART_TXD0 O Serial 0 output
33 UART_RXD0 I Serial 0 input
34 NC NC
35 NC NC
36 GPIO33 I/O Wifi indicator light
37 ANT I/O optional, default unavailable
38 GND Ground Ground