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Chengdu Ebyte Electronic Technology Co., Ltd.
5
GPIO14
6
GPIO12
7
GPIO13
8
VCC
9
GND
10
GPIO15
11
GPIO2
12
GPIO0
13
GPIO4
14
GPIO5
15
RXD
16
TXD
★ GPIO2 is already been internal pulled up
In transparent-transmission on power-up mode, GPIO2 will indicate the status of module. The module has
connected a led to this pin. Users can get the status of the module by observing LED. Besides, you may connect GPIO2
to the external MCU.
LED indication when module works in power-on transparent transmission mode：
Intermittent double flash：cannot connect to AP access point.
Intermittent single flash：connect to AP access point, but cannot connect to TCP server.
Quench：connect to AP access point and TCP server.
4 Recommended connection diagrams
Note：supply voltage is 3.0V~3.6V. 500mA LDO is recommended for steady operation of module.
Copyright ©2012–2018 Chengdu Ebyte Electronic Technology Co., Ltd.
IO
PWM1/GPIO14
IO
PWM0/GPIO12
IO
GPIO13
-
VDC:3.0V~3.6V（above 300mA）
-
GND pin
I
GPIO15
I
0
I
0
IO
PWM2/GPIO4
IO
PWM3/GPIO5
I
UART input pin, support AT command
O
UART output pin, support AT command
GPIO0
GPIO2 ★
1
1
1
0
E103-W01 User Manual
Boot
Boot from
FLASH
Download
firmware from
UART
5
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