Product Instructions

ETOR_2019/02/14
Table 3. Pin Definitions and
Function Descriptions
Pin
Name
Function
1
ANT
Wi-Fi Antenna
2
ADC
ADC interface, 0-1V input range
3
EN
Chip enable
4
GPIO16
GPIO16
5
GPIO14
GPIO14
6
GPIO12
GPIO12: Relay switch, active high
7.
GPIO13
GPIO13: Wi-Fi status indicator lamp, connected
to LED lamp series current limiting
8
GPIO15
GPIO15
9
GPIO2
GPIO2: UART1_TX available for burn-write flash
memory
10.
GPIO0
GPIO0
11
GPIO4
GPIO4
12
GND
GND
13
GPIO9
GPIO9
14
GPIO10
GPIO10
15
GPIO11
GPIO11
16
GPIO6
GPIO6
17
GPIO7
GPIO7
18
GPIO8
GPIO8
19
GPIO5
GPIO5
20
GND
GND
21
RX
UART_RX for writing Flash
22
TX
UART_TX for writing Flash
23
3V3
Power Supply
24
RST
External reset signal: active low