Ebyte E840-DTU User manual

E840-DTU(4G-02E）E840-DTU(4G-02E）

Chengdu Ebyte Electronic Technology Co.,Ltd E840-DTU(4G-02E) User Manual
Copyright ©2012–2019，Chengdu Ebyte Electronic Technology Co.,Ltd
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Contents
Features...................................................................................................................................................................................3
1.1 Introduction.......................................................................................................................................................................4
1.2 System parameter..............................................................................................................................................................4
1.3 Interface description......................................................................................................................................................... 6
1.4 Pin definition.................................................................................................................................................................... 7
2.1 Hardware...........................................................................................................................................................................9
2.2 Data transmission test..................................................................................................................................................... 10
Demonstration：...................................................................................................................................................................11
3. AT command.................................................................................................................................................................... 20
4 .Notes................................................................................................................................................................................. 31
5. Important Statement..........................................................................................................................................................32
6. Reversion History............................................................................................................................................................. 32
7. About Us........................................................................................................................................................................... 32

Chengdu Ebyte Electronic Technology Co.,Ltd E840-DTU(4G-02E) User Manual
Copyright ©2012–2019，Chengdu Ebyte Electronic Technology Co.,Ltd
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E840-DTU(4G-02E ）is developed for serial port devices and network servers to transmit data to each other
through a network.It is a LTE-FDD/WCDMA/GSM wireless communication data
transmission modem with diversity receiving function, supporting LTE-FDD, DC-
HSDPA, HSPA+, HSDPA, HSUPA, WCDMA, EDGE and GPRS network data
connections, through simple AT commands Settings, you can easily use this product to
achieve two-way data transparent transmission from serial to network.
This manual is a quick introduction to the modem E840-DTU(4G-02E). It is the
easiest hardware environment to test the network transmission, that is, to realize data
transmitted between the serial device (here, the computer) and the network server.
Features
Meet almost all M2M application demands;
Data transparent transmission, TCP, UDP network protocol, heartbeat packet, and registration package function
available;
Max serial port baud rate: 230400, two-way serial transmission between device and network server;
Serial port large cache and the serial port data can be cached locally before the server is established.；
SMS sending and receiving, SMS remote query/configuration device parameters;
Multiple Socket links to send and receive at the same time;
Modbus RTU and Modbus TCP to automatically convert each other;
The maximum downlink rate is 150Mbps, and the maximum uplink rate is 50Mbps.
With MQTT protocol, the device can access Alibaba Cloud, oneNET, Baidu cloud, and other IoT platforms;
Network AT command available, which can be configured remotely through the network.

Chengdu Ebyte Electronic Technology Co.,Ltd E840-DTU(4G-02E) User Manual
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1. Product overview
1.1 Introduction
E840-DTU (4G-02E) is an LTE digital transmission module product launched by E-Tech. The software of this
product is fully functional and covers most common application scenarios. Users can implement serial-to-network server
through simple setup. Two-way data transparent transmission.
The radio is powered by the DC power supply or RS485 terminal in the power supply section and is powered by a
wide voltage of 8.0V to 28.0V. Support mobile, China Unicom, Telecom 4G card, RS485 and RS232 circuits use
electrical isolation scheme, with anti-interference ability, can be used in some environments with strong electromagnetic
interference, such as some power industry.
1.2 System parameter
Parameter
Value
Description
Characteristic
Frequency
LTE-FDD：B1/B3/B7/B8/B20/B28A
WCDMA：B1/B8
GSM：B3/B8
LTE
characteristic
Support max. of 3GPP R8 non-CA Cat 4 FDD and TDD
Support 1.4MHz~20MHz , Downstream support：MIMO
LTE-FDD: Max downstream rate 150Mbps, Max upstream
rate50Mbps
WCDMA characteristic
WCDMA: Max downstream rate 384Kbps，Max upstream rate
384Kbps
GSM characteristic
GPRS: Max downstream rate 107Kbps，Max upstream rate
85.6Kbps EDGE: Max downstream rate 296Kbps，Max
upstream rate 236.8Kbps
Network protocol
characteristic
TCP/UDP/PPP/FTP/HTTP/NTP/PING/QMI/NITZ/CMUX/HTTP
S/SMTP/MMS/FTPS/
SMTPS/SSL/FILE
PAP (Password Authentication Protocol) and CHAP
(ChallengeHandshake Authentication Protocol)
Hardware Characteristic
Antenna
SMA
Data interface
RS485 /RS232
Baud rate
Max 921600bps，default 115200bps
Transmitting
power
Class 4 (33dBm±2dB) for GSM900
Class 1 (30dBm±2dB) for DCS1800
Class E2 (27dBm±3dB) for GSM900 8-PSK
Class E2 (26dBm±3dB) for DCS1800 8-PSK
Class 3 (24dBm+2/-1dB) for CDMA BC0
Class 3 (24dBm+1/-3dB) for WCDMA bands

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Class 2 (24dBm+1/-3dB) for TD-SCDMA bands
Class 3 (23dBm±2dB) for LTE-FDD bands
Class 3 (23dBm±2dB) for LTE-TDD bands
FDD B1: -101.5dBm (10M)
FDD B3: -101.5dBm (10M)
FDD B7: -99.5dBm (10M)
FDD B8: -101dBm (10M)
FDD B20: -102.5dBm (10M)
FDD B28A: -102dBm (10M)
WCDMA B1: -110dBm
WCDMA B8: -110.5Bm
GSM 3: -109dBm
GSM 8: -109dBm
Consumption
（Typical）
11uA @ power off
1.8mA @LTE sleep (PF=128)
1.5mA @LTE sleep (PF=256)
20mA @idle
Bandwidth
1.4/3/5/10/15/20MHz
Operating
temperature
-30℃- +70℃ extending to -40℃~+85℃
Operating voltage
DC ８V~２８V
Size
82×84×24mm
RS485 /RS232
RS485/RS232

Chengdu Ebyte Electronic Technology Co.,Ltd E840-DTU(4G-02E) User Manual
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1.3 Interface description

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1.4 Pin definition
Pin No.
Name
Description
1
RS232
RS232 interface
2
485_A
To connect the end A of other RS485 device
3
485_B
To connect the end B of other RS485 device
4
GND
Ground
5
VCC
Power supply，8~28V,12V or 24V is recommended
6
PWR
Power indicator
7
WORK
Blue: Receipt transceiver pin, when the network receives data or the serial port
receives data (50ms high/10ms low)
Green: device status indication pin, Low: The device is powered on to search for a
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;

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8
NET
Green: Socket A link connection status indication pin High: Socket A is successfully
connected to the network server; Low: Socket A is not successfully connected to the
network server;
Blue: Socket B link connection status indication pin High: Socket B is successfully
connected to the network server; Low: Socket B is not successfully connected to the
network server;
9
DC-IN
DC adaptor，8~28V, 12V or 24V is recommended
10
RST
Dip switch（downward，reset）
11
Restore
Dip switch
After the radio is powered on normally, the Restore dials from top to bottom, and
continues down for 3~10S, then from bottom to top. After the process is completed
normally, the radio parameters will be restored to the factory settings and restarted
immediately.
12
SIM
SIM card slot
13
ANT
Antenna （SMA-K，50Ω impedance）

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Copyright ©2012–2019，Chengdu Ebyte Electronic Technology Co.,Ltd
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2.Quick start
2.1 Hardware
Hardware for test are as follows：
Connect the power supply, antenna, SIM card, serial cable and other hardware before testing.
1. Enter the AT command mode and send +++ in the serial port assistant (except that +++ does not need to tick to send
a new line, other AT commands need to check to send a new line to be valid), you must send +++ command 3s Send
any other AT command (except for restarting the AT command) to fully enter the AT command mode.
2. After entering the AT command mode, use AT+CPIN to check the SIM card access:
For example: AT+CPIN
+OK=1
Indicates that the SIM card is connected and uses AT+CSQ to view the current signal strength:
For example: AT+CSQ
+OK=26
Indicates that the current signal strength is normal. If the response is 99, the current signal strength is abnormal. Check
whether the current antenna is connected or the surrounding base station is abnormal.
3. Access server, AT + SOCK = TCPC, 116.62.42.192, 31687 (parameters are separated by English characters comma,
separated by English characters between IP instructions), if it is SOCK1, SOCK2, SOCK3, need to be The front-end plus
enable command (see the AT command description section for details).
SOCK settings
For example: AT+SOCK=TCPC, 116.62.42.192, 31687
+OK
SOCK1, SOCK2, SOCK3 settings
For example: AT+SOCK1=0, TCPC, 116.62.42.192, 31687

Chengdu Ebyte Electronic Technology Co.,Ltd E840-DTU(4G-02E) User Manual
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+OK
Indicates that the setting was successful.
4. Restart (after all AT commands modify parameters, the device will take effect after restarting)
Execution command AT+REBT returns OK and the device restarts immediately. Here IP only shows the
demonstration. The actual connection is based on the IP of the server to be connected.
5. After the base station is connected, the NET light is always on to indicate that the server is connected, and transparent
transmission is possible at this time.
2.2 Data transmission test