18
GPIO30
IO
General IO port
19
GPIO1
O
UART serial output pins with AT command support
20
GPIO2
I
UART serial input pins, AT command support
21
GPIO3
IO
General IO port
22
GPIO4
IO
General IO port
23
GPIO5
IO
General IO port
24
GPIO6
IO
General IO port
25
GPIO7
IO
General IO port
26
GPIO8
IO
General IO port
27
GPIO9
O
Wifi connection status indicator, connected output low, not
connected output high
30
GPIO10
O
Network connection status indicator, connected output low,
unconnected output high
31
GPIO11
O
Smartconfig status indicator, low when in status, low when
not in status High
32
GPIO12
I
Restore factory settings pin, set to low at startup, after the
status indicator flashes three times alternately, the factory
settings will be restored (1 to restore factory settings, you
need to press the reset button)
33
GPIO13
IO
General IO port
34
GPIO14
IO
General IO port
35
GPIO15
IO
General IO port
36
GPIO16
IO
General IO port
37
GPIO17
IO
General IO port
38
GPIO22
IO
General IO port
39
GPIO28
IO
General IO port
40
TDI
I
JTAG Simulation foot
41
TDO
O
JTAG Simulation foot
42
TCK
I
JTAG Simulation foot
43
TMS
IO
JTAG Simulation foot