Chengdu Ebyte Electronic Technology Co.,Ltd.
E330-400T13S User Manual
Copyright ©2012–2021
，
Chengdu Ebyte Electronic Technology Co.,Ltd.
7
14
NC
Reserved
(OCDSDA)
15
NC
Reserved
(VDD
）
16
NC
Reserved
PA4
17
NC
Reserved
PA2
18
NC
Reserved
GPIO3
19
GND
-
Module ground
20
GND
-
Module ground
21
ANT
-
antenna
22
GND
-
Module ground
4. Connection diagram
No.
Brief description of the connection between the module and the single-chip microcomputer
(the above figure takes the STM8L single-chip microcomputer as an example)
1
The wireless serial port module is TTL level, please connect with TTL level MCU.
2
For some 5V microcontrollers, it may be necessary to add 4-10K pull-up resistors to the TXD and AUX pins of the
module.
