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Chengdu Ebyte Electronic Technology Co.,Ltd.
E104-BT40 User Manual
Copyright ©2012–2019
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Chengdu Ebyte Electronic Technology Co.,Ltd.
3-5
3. Size and pin definition
Pin No. Definition
Direction
Function
Description
1
GND
-
Power supply Power supply reference
2
TXD
Output
Serial data
transmission
Module outputs serial data to external
3
RXD
Input
Serial data
reception
Module receives external serial data
4
P02
Output
General output IO User can set output level
5
P03
Output
General output IO User can set output level
①
6
P04
-
-
NC
7
P05
-
-
NC
8
P06
-
-
NC