Ebyte E22-230T33S - 3 Size and pin definition; 3.1 E22-230 T30; 33 S pin definition

Chengdu Ebyte Electronic Technology Co.,Ltd. E22-230TXXS User Manual
Copyright ©2012–2024，Chengdu Ebyte Electronic Technology Co.,Ltd.
7
3 Size and pin definition
3.1 E22-230T30 / 33S pin definition
Pin No.
Item
Direction
Description
1
GND
import
Module ground wire
2
VCC
import
Module power supply is positive reference, voltage range: 3.3~5.5V
DC
3
AUX
output
Used to indicate the working state of the module; user awakens
external MCU and output low level during self-test initiation (can be
suspended)
4
TXD
output
TTL serial port output, connected to the external RXD input pin;
5
RXD
import
TTL serial port input, connected to the external TXD output pin;
6
M1
Input (very weak
pull-up)
With M0, determine the four working modes of the module (not
suspended, if not grounded)
7
M0
Input (very weak
With M1, determine the four working modes of the module (not