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E840-TTL-GPRS03
User Manual
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Ebyte E840-TTL-GPRS03 User Manual

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E840-TTL-GPRS03 User Manual
2G Wireless module
Chengdu ebyte electronic Technology Co.,Ltd. E840-TTL-GPRS03 User Manual
1
Contents
FEATURE............................................................................................................................................................................................ 2
1.1 BRIEF INTRODUCTION.................................................................................................................................................................2
1.2 PARAMETERS.............................................................................................................................................................................. 3
1.3 INTERFACE DESCRIPTION........................................................................................................................................................... 4
1.4 PIN DEFINITION...........................................................................................................................................................................4
2. QUICK START............................................................................................................................................................................... 5
2.1 DEVICES PREPARATION.............................................................................................................................................................. 5
2.2 DATA TRANSMISSION TEST.........................................................................................................................................................6
2.2.1 Operating modes are as follows
3. NETWORK FUNCTION................................................................................................................................................................ 7
.................................................................................................................................
：
7
7. NOTES.......................................................................................................................................................................................... 15
8. IMPORTANT STATEMENT........................................................................................................................................................16
9. REVISION HISTORY.................................................................................................................................................................. 16
10. ABOUT US................................................................................................................................................................................. 16
Copyright ©2012–2017，Chengdu ebyte electronic Technology Co.,Ltd.
Chengdu ebyte electronic Technology Co.,Ltd. E840-TTL-GPRS03 User Manual
2
Meets almost all M2M requirement;
Support data transparent transmission, support TCP, UDP network protocol, support heartbeat package,
Support serial port caching function, the serial port data can be cached locally before the connection is
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

1. Introduction

E840-TTL-GPRS03 is designed for the communication between UART and net server via GPRS. With easy AT
setting, the dual transparent transmission can be conducted. The module supports GSM850, EGSM900, DCS1800 and
PCS1900 with GSM/GPRS standard.
This chapter focuses on the brief introduction of E840-TTL-GPRS03. It explains how to make the simplest
hardware environment and test the transparent transmission. The transparent transmission is between UART devices （referring to PC）and net sever (replaced by TCP testing tools).

Feature

registration package;
established with the server;
CS-4；

1.1 Brief Introduction

E840-TTL-GPRS03 is a new generation wireless module 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.
On the module 2.0mm pin header is used for easy integration by user. It is powered by a wide voltage of 5.0V to 25.0V.
It supports 2G SIM card. Communication and LED use compatible communication level of 3.3v and 5v, 3.3v as
default. The module has anti-interference ability and can be used in some environments with strong
electromagnetic interference, such as some power industries.
Copyright ©2012–2017，Chengdu ebyte electronic Technology Co.,Ltd.
Chengdu ebyte electronic Technology Co.,Ltd. E840-TTL-GPRS03 User Manual
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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
IPEX
Data interface
TTL@3.3V compatible with 5V
Baud rate
Max of 921600bps, 115200bps as default
TX power
Class 4 (2W)： GSM850 and EGSM900 Class 1 (1W)： DCS1800 and PCS1900
Current consumption
（typical）
48mA@5V（idle）
22mA@12V（idle）
14mA@20V（idle）
Operating temperature
-30℃- +70℃；extending to -40℃~+85℃
Operating voltage
DC：5V~20V；powered by lithium battery：3.8V~4.6V
Size
42×40×9.7 mm
SIM card holder
MICRO SIM card holder
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

1.2 Parameters

Copyright ©2012–2017，Chengdu ebyte electronic Technology Co.,Ltd.
Chengdu ebyte electronic Technology Co.,Ltd. E840-TTL-GPRS03 User Manual
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Pin NO.
Name
Description
1
RST
Reset
2
IORT
When in low level for 3~10S, module returns to factory setting and start over
immediately
3
LINK
The link connection status indication pin corresponds to the onboard left 1 LED. High：successfully connect with network server；
Low：fail to connect with network server；
4、24、25
NC
Suspended, N/A
5
DATA
The data transceiver 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.
6
STAT
The device status indication pin corresponds to the onboard left 2 LED.
Low: The device is powered on to search for SIM card
1800ms for low, 200ms for high: the device checks the correct SIM card and is
attaching to the network;
High: The device is attached to the network successfully.
7
RXD
Data RX，default 3.3V，compatible with 5V
8
TXD
Data TX，default 3.3V，compatible with 5V
9
VEF
Drive level power supply pin, if user need to achieve serial communication and
LED indication of 5V drive level, user need to input 5V level on this pin.
10、11、14、
15、23
MOD、SLE、
PA0、PA1、EN
Suspended, N/A

1.3 Interface Description

1.4 Pin Definition

Copyright ©2012–2017，Chengdu ebyte electronic Technology Co.,Ltd.
Chengdu ebyte electronic Technology Co.,Ltd. E840-TTL-GPRS03 User Manual
5
12
4V2
Lithium battery power supply pin，range：3.8V~4.6V. This pin is prohibited from
being reversed and is not allowed to be supplied with VCC.
16
VCC
DC power supply pin，range：5V~20V. This pin is prohibited from being reversed
and is not allowed to be supplied with 4V2.
19
VD
Power pin to connect SIM externally, NC for pcb SIM card holder.
20
RS
Reset pin to connect SIM externally, NC for pcb SIM card holder.
21
DA
Data pin to connect SIM externally, NC for pcb SIM card holder.
22
CL
Clock pin to connect SIM externally, NC for pcb SIM card holder.
13、17、18
GND
Ground

2. Quick start

1、 Enter the AT command mode and send +++ in the serial port assistant (+++ does not need to check to
2、 After entering the AT command mode, use AT+CPIN to check the SIM card access:

2.1 Devices preparation

Please get UART, SIM card, sucker antenna and etc. ready according to the recommended circuit before test.
send a new line, other AT commands need to tick to send a new line to be valid), one must send any
other AT command within 3 seconds after sending +++ (except for AT command for restarting) to
enter the AT command mode completely.
For example: AT+CPIN
+OK=1
Indicates that the SIM card is connected, and use 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 commas in
English characters, and IP commands are separated by English characters).
SOCK settings
For example: AT+SOCK=TCPC, 116.62.42.192, 31687
+OK
Copyright ©2012–2017，Chengdu ebyte electronic Technology Co.,Ltd.
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