Ebyte E840-DTU, GPRS-03 User Manual

GPRS Serial Server

E840-DTU（GPRS-03）

User Manual

This manual may be modified based on product upgrade, please refer to the latest version.

All rights to interpret and modify this manual belong to Chengdu Ebyte Electronic Technology Co., Ltd.

GPRS E840-DTU（GPRS-03）User Manual

Copyright ©2012–2017, Chengdu Ebyte Electrical Technology Co., Ltd.

1

Version

Date

Description

Issued by

1.00

2018/08/02

Initial version

huaa

E840-DTU (GPRS-03) is a product developed for serial port devices and network servers to transmit data through each other through the network. This product

uses the standard AT command, which enables transparent transmission between devices and servers. The cloud platform built by Ebyte can realize the free

networking mode. The E840-DTU (GPRS-03) is an industrial grade quad-band GSM/GPRS digital radio.

This chapter is a quick introduction to the E840-DTU (GPRS-03) product. It is the easiest hardware environment to test the E840-DTU (GPRS-03) network

transmission function, that is, to realize the serial device (here, the computer) to the network server ( TCP test tool instead of) network transparent transmission.

Feature

 Able to meet almost all M2M application needs;

 Support data transparent transmission, support TCP, UDP network protocol, support heartbeat package, registration package;

 Support serial port caching function, the serial port data can be cached locally before the connection is established with the server;

 Maximum GPRS data downstream rate is 85.6kbps, maximum upstream rate is 85.6kbps;

 Support TCP/UDP/FTP/PPP/HTTP/NTP/MMS/SMTP/PING，code format include CS-1、CS-2、CS-3 and CS-4；

 Support 8~28V wide voltage power supply, adopt DC power supply and terminal terminal power supply mode;

 The RS485 circuit uses electrical isolation, lightning protection, and surge protection to provide immunity to interference.

GPRS E840-DTU（GPRS-03）User Manual

Copyright ©2012–2017, Chengdu Ebyte Electrical Technology Co., Ltd.

2

Contents

FEATURE

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1

1. INTRODUCTION

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3

1.1 BRIEF INTRODUCTION

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3

1.1. PARAMETERS

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3

1.2. INTERFACE DESCRIPTION

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4

1.3. PIN DEFINITION

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5

2. QUICK START

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5

2.1. DEVICES PREPARATION

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5

3. OPERATING MODE

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3.1 TRANSPARENT TRANSMISSION

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3.2 AT MODE

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3.3 MODE SWITCH

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4. NETWORK FUNCTION

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5. EBYTE IOT PLATFORM FUNCTION

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6. AT COMMAND

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8

7. NOTES

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14

8. IMPORTANT STATEMENT

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15

9. ABOUT US

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GPRS E840-DTU（GPRS-03）User Manual

Copyright ©2012–2017, Chengdu Ebyte Electrical Technology Co., Ltd.

3

1. Introduction

1.1 Brief Introduction

E840-DTU (GPRS-01) is a new generation wireless data transceiver developed by Ebyte. The software of this product is fully functional and covers most of the

conventional application scenarios. Users can realize the transparent transmission of bidirectional data from serial port to network server through simple setting.

The radio is powered by the DC power supply or RS485 terminal in the power supply section. It is powered by a wide voltage of 8.0V to 28.0V and supports

5.0V power supply. It only supports mobile and Unicom 2G cards. RS485 and RS232 circuits use electrical isolation schemes, which have anti-interference ability and

can be used in some environments with strong electromagnetic interference, such as some power industries.

1.2 Parameters

Item

Value

Description

Characteristic Features

Support Band

Quad Band: GSM850, EGSM900, DCS1800, PCS1900

Module automatically searches for frequencies

Band selection can be set by AT command

Compliant with GSM Phase 2/2+

GPRS connection characteristic

GPRS multi-slot class 12 (default)

GPRS multi-slot class 1~12 (configurable)

GPRS mobile station class B

GPRS data feature

GPRS data downstream transmission: up to 85.6kbps

GPRS data upstream transmission: up to 85.6kbps

Encoding format: CS-1, CS-2, CS-3 and CS-4

Support for PAP (Password Authentication Protocol) protocols commonly used for PPP

connections

Support is usually used for CHAP (Interrogation Handshake Authentication Protocol) protocol

Embedded protocol: TCP/UDP/FTP/PPP/HTTP/NTP/MMS/SMTP/PING, etc.

Support for unstructured supplementary data services (USSD)

Hardware Features

Antenna

SMA

Data interface

RS485 / RS232

Baud rate

1200bps ~115200bps，default：115200bps

TX power

Class 4 (2W)： GSM850 and EGSM900
Class 1 (1W)： DCS1800 and PCS1900

AT command format

Ebyte general AT command

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

GPRS E840-DTU（GPRS-03）User Manual

Copyright ©2012–2017, Chengdu Ebyte Electrical Technology Co., Ltd.

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1.3 Interface Description