Ebyte E90-DTU 900SL22-GPRS User manual

E90-DTU (900SL22-GPRS)

Chengdu Ebyte Electronic Technology Co,;Ltd E90-DTU (900SL22-GPRS) user manual
Copyright ©2012–2019，Chengdu Ebyte Electronic Technology Co,;Ltd 1
Content
1.OVERVIEW...................................................................................................................................................................... 2
1.1 INTRODUCTION........................................................................................................................................................................... 2
1.2 FEATURES.....................................................................................................................................................................................3
1.3 STATION SYSTEM PARAMETERS.................................................................................................................................................... 4
1.4 PIN DESCRIPTION.........................................................................................................................................................................5
1.5 SIZE..............................................................................................................................................................................................7
2 QUICK START..................................................................................................................................................................8
2.1 HARDWARE PREPARATION AND COMMUNICATION TESTING......................................................................................................... 8
2.2 WORKING MODE AND FUNCTIONS............................................................................................................................................ 14
3 APPLICATION MODEL............................................................................................................................................... 17
4 NOTE............................................................................................................................................................................... 19
5 ABOUT US.......................................................................................................................................................................19

Chengdu Ebyte Electronic Technology Co,;Ltd E90-DTU (900SL22-GPRS) user manual
Copyright ©2012–2019，Chengdu Ebyte Electronic Technology Co,;Ltd 2
1.Overview
1.1 Introduction
E90-DTU (900SL22-GPRS) is a data transmission station from radio frequency to GPRS network server, which
realizes the transparent data transmission between sub-1g and GPRS network. The sub-1g radio frequency transceiver is
based on SEMTECH SX1262 radio frequency chip and supports LoRa spread spectrum technology. It is equipped with
high-performance MCU internally, which enables the module to have a variety of transmission modes.At the network end
of GPRS network, the radio supports LTE-FDD/TTE-TDD /WCDMA/ TD-SCDMA /CDMA/GSM wireless
communication data transmission, and supports LTE-FDD, LTE-TDD, dc-HSDPA, HSPA+, HSDPA, HSUPA, WCDMA,
TD-SCDMA, CDMA, EDGE and GPRS network data connection.
E90-DTU (900SL22-GPRS) can be directly connected to the upper computer via USB cable for parameter
configuration, without the need to install the driver, it is easy to change user-defined parameters.
This chapter is a quick introduction to E90-DTU (900SL22-GPRS) products. It builds the simplest hardware
environment to test the network transmission function of E90-DTU (900SL22-GPRS), that is, to realize the two-way
transmission of data from RF module to the network server.

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1.2 Features
Can meet almost all M2M application needs;
Support transparent data transmission, support TCP, UDP network protocol, support heartbeat package,
registration package;
Support serial port caching function, the serial data can be cached to local before establishing connection
with the server;
The maximum downlink rate of GPRS data was 85.6 KBPS, and the maximum uplink rate was 85.6
KBPS.
Software/hardware dual door design, system stability, never crash;
Sub-1g radio frequency;
Support global license-free ISM 868/915mhz frequency band;
Support data transmission rate of 0.3kbps ~ 62.5kbps;
Based on SX1262/1268 development, support the new generation of LoRa technology;
Support RSSI for evaluating signal quality, improving communication network, ranging;
Support LBT, monitor channel environment noise before sending, improve communication success rate;
Industry-standard design, support - 40 ~ 85 ° C for a long time use;
Use USB to connect the computer, no need to install the driver, connected to the computer can be
configured parameters.
Support 8~28V wide voltage supply, DC power supply base and terminal power supply.
The power supply has good over current, over voltage, anti - reverse connection and other functions.

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1.3 Station system parameters
Parameter
type
Parameter
Name
The parameter value
Description
Characteristic
parameters
Support
Frequency
Quad-frequency: GSM850, EGSM900,
DCS1800, PCS1900
Module can automatically search frequency
Frequency selection can be set with the AT
command
Conform to GSM Phase 2/2+
-
GPRS
Connection
characteristics
GPRS multi-slot class 12 (default)
GPRS multi-slot class 1~12 (configurable)
GPRS mobile station class B
-
GPRS Data
features
GPRS data downlink transmission: up to
85.6 KBPS
GPRS uplink data transfer: up to 85.6 KBPS
Coding formats: cs-1, cs-2, cs-3 and cs-4
Supports the PAP (password verification
protocol) protocol commonly used for PPP
connections
Support for protocols commonly used for
CHAP (query handshake authentication
protocol)
The built-in protocols:
TCP/UDP/FTP/PPP/HTTP/NTP/MMS/SM
TP/PING, etc.
Support for unstructured supplementary data
services (USSD)
-
The antenna
interface
SMA interface, NET signal output, 50ohm
characteristic impedance
-
Transmission
Power
Class 4 (2W)：
GSM850 and EGSM900
Class 1 (1W)：DCS1800 and PCS1900
-
RF
Characteristic
parameters
The air rate
2.4kbps
8 adjustable level
（0.3、
1.2、 2.4、 4.8、 9.6、 19.2、
38.4、62.5kbps）
WOR role
receiver
Can be configured as a receiver/sender
WOR cycle
2000ms
500ms~4000ms
It can be configured as 500ms~4000ms
Transport mode
Transparent Transmission
Can be configured for transparent transmission
or fixed-point transmission
The module
address
0~65535
Default address 0
working
frequency
850.125MHz-930.125MHz
Default 868.125MHz, channel number 80,
channel interval 1MHz
Transmission
power
22dBm
level 4 adjustable (22, 17, 13, 10dBm)
Receiving
sensitivity
[email protected]
The receiver sensitivity is independent of the
baud rate and delay time
Baud rate
115200 bps
No modification supported
The antenna
interface
SMA Interface
RF signal output, 50 ohm characteristic
impedance
Station system
parameters
Flow loss value
(typical value)
66.5mA@12V
Idle state, no data transmission
Working
temperature
-30℃~+70℃
Extended to 40 ℃ ~ + 85 ℃ temperature
Working voltage
DC 8~28V
Recommend 12V/24V power supply
Size
108*75*37mm
Overall size (excluding antenna)

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1.4 Pin Description
3GPP
Frequency
1 Timeslot
2 Timeslot
4 Timeslot
CS-1
9.05kbps
18.1kbps
36.2kbps
CS-2
13.4kbps
26.8kbps
53.6kbps
CS-3
15.6kbps
31.2kbps
62.4kbps
CS-4
21.4kbps
42.8kbps
85.6kbps

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No.
Name.
Function
1
Grounding screw
Ground connection
2
DC_IN
Power adapter interface, power supply range 8~28V, recommended 12V/24V
3
DC_IN-
Power reference ground
4
DC_IN+
Power input, power supply range 8~28V, recommended 12V/24V
5
Reset
System reset button, long press time no requirement
6
USB
Micro USB：parameter configuration interface
7
Reload
Press 4~10s to restore the factory Settings
8
PWR
Red: power indicator
9
WORK
Yellow: data transmission indicator light; The light flashes when there is data
transmission
10
LINK
Yellow: network indication, always on after net
11
NET
4 G/GPRS antenna interface (SMA - K external thread hole, 50 Ω characteristic
impedance)
12
SIM
SIM card slot
13
RF
RF antenna interface (SMA - K external thread hole, 50 Ω characteristic impedance)
Note: it is recommended to connect the housing with the earth through grounding screws.

Chengdu Ebyte Electronic Technology Co,;Ltd E90-DTU (900SL22-GPRS) user manual
Copyright ©2012–2019，Chengdu Ebyte Electronic Technology Co,;Ltd 7
1.5 Size

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Copyright ©2012–2019，Chengdu Ebyte Electronic Technology Co,;Ltd 8
2 Quick start
2.1 Hardware preparation and communication testing
Before the test, connect the power supply, USB cable, SIM card (insert the gap outwards), antenna and other
hardware according to the recommended circuit. If the power cable is successfully connected, the PWR indicator will
always be on.
E90-DTU (900SL22- GPRS) device and E22-900TXXS module
5V—20V Power adapter
USB switch to TTL module and USB wire
GPRS/LTE Sucker antenna
Computer browser visit Chengdu Ebyte official website: www.ebyte.com, download the latest E90-DTU
(900SL22-GPRS) series product configuration tools, E22 series product configuration software and serial
assistant (this article USES XCOM), install USB 232/485 driver, run the software!
1. After connecting the E22-900TXXS module with the USB-to TTL module, open the officially provided E22
configuration tool and select the corresponding COM number. If the COM number cannot be selected, check
whether the serial driver is installed correctly.

Chengdu Ebyte Electronic Technology Co,;Ltd E90-DTU (900SL22-GPRS) user manual
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2. Open the officially provided E90-DTU (900SL22-GPRS) configuration tool. If the USB is correctly connected, the
message box on the right side will prompt "device ready".
3. After entering the GPRS/2G network pass-through configuration mode, the parameters of GPRS/2G module can be
configured in the "setting relevant parameters" box. After the configuration is completed, click the "save NET
parameters" button, and the upper computer will prompt "save all parameters successfully". After completion, as
shown in the following figure: