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Chengdu Ebyte Electronic Technology Co., Ltd.
1.3 Interface description
1.4 Pin definition
Pin no.
Name
1
RST
2
IORT
3
LINK
4、24、25
NC
5
DATA
6
STAT
7
RXD
8
TXD
Copyright ©2012–2019, Chengdu Ebyte Electronic Technology Co.,Ltd.
The low level lasts for 3~10S, the module parameters will be restored to the factory settings, and
The link connection status indication pin corresponds to the onboard left 1 LED.
High: Successful connection to the web server;
Low: failed to connect to the web server;
Data transmission and reception indication pin, when the network receives data or the serial port
receives data (50ms high/10ms low), corresponding to the onboard third LED light from the left.
The device status indication pin corresponds to the onboard second LED from the left.
Low: The device is powered on to search for SIM card1800ms low, 200ms high: the device
checks the correct SIM card and is attaching to the network;
High: The device is attached to the network successfully.
Data receiving pin，default 3.3V，compatible with 5V
Data transmitting pin，default 3.3V，compatible with 5V
Function
Module reset
will be restarted immediately.
Not used
E840-TTL-NB03 User Manual
4
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