Ebyte E840-TTL-4G02E User Manual page 7

Chengdu Ebyte Electronic Technology Co.,Ltd.
4 LIKB
5 DATA
6 STAT
7 RXD
8 TXD
9 VEF
MOD、SLE、
10、11、
PA11、PA10、
14、 15、 23
EN
12 4V2
16 VCC
19 VD
20 RS
21 DA
22 CL
24 LIKD
25 LIKC
13、 17、 18 GND
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The SocketB link connection status indicator pin corresponds to the onboard
left 2 LED.
High: SocketB is successfully connected to the web server;
Low: SocketB did not successfully connect to the network server;
The data TX and RX indication pin, when the network receives the data or
the serial port receives the data (50ms high/10ms low), corresponding to the
onboard left 3LED light.
The device status indication pin corresponds to the onboard left 4 LED.
Low: The device is powered on to search for SIM card
1800ms 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 communication level.
Data transmitting pin, default 3.3V, compatible with 5V communication
level.
Drive level power supply pin, if you need to achieve serial communication
and LED indication is 5V drive level, you need to input 5V level on this pin.
NC
Lithium battery power supply pin, power supply range: 3.8V~4.3V. This pin
is prohibited from being reversed and is not allowed to be supplied with
VCC.
DC power supply pin, power supply range: 5V~18V. This pin is prohibited
from being reversed and is not allowed to be supplied with VCC.
External SIM card power supply pin, if the onboard SIM card holder is used,
the pin remains NC
External SIM card reset pin, if the onboard SIM card holder is used, the pin
remains NC
External SIM card data pin, if the onboard SIM card holder is used, the pin
remains NC
External SIM card clock pin, if the onboard SIM card holder is used, the pin
remains NC
SocketD link connection status indicator pin, corresponding to the onboard
right 3 LED.
High: SocketD is successfully connected to the web server;
Low: SocketD did not successfully connect to the network server;
SocketC link connection status indicator pin, corresponding to the onboard
right 2 LED.
High: SocketC is successfully connected to the web server;
Low: SocketC did not successfully connect to the network server;
Ground
E840-TTL-4G02E User Manual
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