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Chengdu Ebyte Electronic Technology Co.,Ltd.
Pin
Pin name
number
1
M0
2
M1
3
RXD
4
TXD
5
AUX
6
VCC
7
GND
Fixed
8
hole
Fixed
9
hole
Fixed
10
hole
Fixed
11
hole
Copyright ©2012–2020，Chengdu Ebyte Electronic Technology Co.,Ltd.
7
Figure 3-1 Mechanical dimensions and pin definition
Pin Orientation
Input (very
Cooperate with M1 to determine the 4 working modes of the module
weak pull-up)
(can not be suspended, if not used, it can be grounded)
Input (very
Cooperate with M0 to determine the 4 working modes of the module
weak pull-up)
(can not be suspended, if not used, it can be grounded)
Input
TTL serial port input, connected to the external TXD output pin;
Output
TTL serial output, connected to external RXD input pin;
Used to indicate the working state of the module; the user wakes
Output
up the external MCU, and outputs a low level during the power-on
self-test initialization; (can be left floating）
Module power supply positive reference, voltage range: 3.0 to 5.5V
Input
DC
Input
Module Ground
-
Fixed hole
-
Fixed hole
-
Fixed hole
-
Fixed hole
E22-230T30D User Manual
pin usage
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