AKIM GPRS-22 User manual

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AKIM ELEKTRONİK LTD.
AKIM GPRS/GSM-MODEM
GPRS-22
User Manuel
Rev. 1.2
26.03.2019

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This document contains the operating instructions for the AKIM GPRS-22 modem.

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CONTENTS
INTRO....................................................................................................................................1
1. TECHNICAL SPECIFICATIONS .....................................................................................3
2. USING INSTRUCTIONS.................................................................................................4
2.1. MODEM SETUP ......................................................................................................5
2.2. MODUL INFO...........................................................................................................7
3. MODEM START UP .......................................................................................................9
3.1 INFORMATIONS ABOUT LCD MESSAGES..........................................................10
3.1. SMS.......................................................................................................................11
3.2. MESSAGE TYPES SENDED BY MODEM.............................................................11

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FIGURES TABLE
Fig-1: GPRS/GSM Modem Overview..................................................................................... 1
Fig-2: Menu........................................................................................................................... 4
Fig-3: TKeypad...................................................................................................................... 5
Fig-4: PC1 IP Number ........................................................................................................... 5
Fig-5: Tel No Screen ............................................................................................................. 5
Fig-6: PC1 PORT No Screen................................................................................................. 5
Fig-7: ‘GSM PORT No Screen............................................................................................... 6
Fig-8: ‘GSM STATION Screen............................................................................................... 6
Fig-9: ‘SEND PERIOD’ Screen.............................................................................................. 6
Fig-10: Control Bits................................................................................................................ 6
Fig-11: ‘APN NAME’ .............................................................................................................. 7
Fig-12: ‘USER NAME’ ........................................................................................................... 7
Fig-13: ‘PASSWORD’ ........................................................................................................... 7
Fig-14: Serial Number ........................................................................................................... 7
Fig-15: Model No................................................................................................................... 8
Fig-16: Manufacturer Name................................................................................................... 8
Fig-17: Version Number Screen ............................................................................................ 8
Fig-18: Imei Number Screen.................................................................................................. 8
Fig-19: Initial Screen of LCD Display..................................................................................... 9
Fig-20: ’OKEY’ Message ....................................................................................................... 9
Fig-21: ’EROR-2’ Message.................................................................................................... 9
Fig-22: ’OKEY-2’ Message.................................................................................................... 9
Fig-23: ‘! SERVER !’ Message..............................................................................................10
Fig-24: Message Received by Modem .................................................................................11
Fig-25: PC-ToConnect Screen..............................................................................................11

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Intro
Akim GPRS modem is produced in 3 different models. Designed for Akim PLV, Akim
Liminigraf and other Akim Data logger devices. GPRS modems have features such as SMS
sending, receiving, TCP / IP connection (Server / Client) and Data call. These features can
work selectively. When a data call and TCP / IP call are made, the modem automatically
makes the transparent connection with the logger devices. It does not interfere with the
exchange of information between the device and the server / client computer. Akim GPRS
modem is designed to respond to any customer requests. Akim GPRS modem can be used
in other logger devices thanks to its functional and transparent connection capability. General
view of the device is shown in Figure-1.
Figure-1: GPRS/GSM Modem Overview
The GPRS modem provides a transparent connection to the server computer when it
is running as a client. The modem remains connected to the computer as long as the
computer is disconnected. Access to all information on the Logger device is provided. The
GPRS modem automatically disconnects if the data exchange is not carried out within 5
minutes during which the GPRS modem remains connected.
Thanks to the modem's SMS receiving and sending, instantaneous values from
Logger devices can send SMS to defined phone numbers.
When alarm status information is received from Logger devices, SMS can be sent to
three phone numbers registered on the GPRS modem (see Figure-5 on page 6).
Modem Status LED
Network data
sending status LED
Rs-232 Conn.
Mounting Screw
Antenna
3x16 Char. LCD
Display
Keypad
8…24 V DC
Power Conn.
On/Off Button

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The GPRS modem has a reset feature via SMS. The SMS message receiving and
sending feature is optional, details on this can be viewed on page 6.
The GPRS modem has the ability to connect with TCP / IP and to respond to data
calls. Apart from the fact that these two features can be used at the same time, only the
ability to answer data calls can be used alone. If there is no internet connection in the GPRS
modem, the device can answer data calls and connect to Logger devices via GSM modem.
The GPRS modem checks a network every minute. In the network control, the
antenna power, internet quality and network connection controls can be done automatically.
During this check, if the modem is out of server mode, it tries to remain active by trying to
enter the server mode again. If the Modem is disconnected from the Network or the Internet,
the modem automatically restarts itself. The modem performs this check 3 times. If all three
controls have no internet connection or network connection, the modem switches off and on
automatically every six hours. This cycle continues until the internet and network connection
is reached. The modem has the ability to turn itself off and on every 24 hours.

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1. TECHNICAL SPECIFICATIONS
Power Supply: 8 … 28Volt DC Peak 1,5A
Standbye: 25mA
Power off: 62uA
Idle (registered, power saving): 1.5mA @ DRX=9
Dedicated mode: <240 mA @ max power level
GPRS class 10: <420 mA @ max power level
RS232 Port : 1 Conn.
SMS Receiving and Sending
Quad Band EGSM - 850/900/1800/1900MHz
Output Power
Class 4 (W) @ 850/900MHz
Class 1 (1W) @ 1800/1900MHz
Control via AT commands according to 3GPP TS 27.005, 27.007 and Telit Custom
AT commands
Serial port multiplexer 3GPP TS 27.010
SIM access profile
TCP/IP stack access via AT commands
Sensitivity
107 dBm (tpy.) @ 850/900MHz
106 dBm (typ.) @ 1800/1900MHz
Power consumption (typical values)
Extended temperature range
-4o to +80°C (operational)
-40 to +85°C (storage temperature)
Point-to-point mobile originated and mobile terminated SMS
Concatenated SMS supported
SMS cell broadcast
SMS Text mode
SMS over GPRS
Circuit Switched Data Transmission
GPRS Class 10
Mobile station class B
Coding scheme 1 to 4
Network LED support
Embedded TCP/IP stack, including TCP, IP, UDP, SMTP, ICMP and FTP protocols

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2. USING INSTRUCTIONS
The energy required by the GPRS / GSM modem device is 8…28 volts DC. In order to be
connected to the grid, a high gain antenna or a yagi antenna is required. When the modem is
connected to the appropriate data loggers via the RS232 cable, the device is ready for
operation.
There are 3 section on the Menu(Fig-2)
1-MODEM SETP: Necessary information to install the modem and connect to the internet are
entered and displayed in this section. It is the section where the APN name, user name and
password and setup flags and phone numbers are processed and seen.
2-MODEM INFO: Gives information about the module. It contains information such as serial
number of module, imei number, version number.
3-MODEM RST: Used to turn the module off and on. When this menu is entered, it turns on the
modem if the module is turned off, if the modem is off, it turns the module off and on again,
and starts re-installing the modem.
Detailed information about these menus is described in detail with figures below.
Fig-2: Menu
If the enter button is pressed while the modem is on, the menu in figure 2 opens.

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2.1. Modem Setup
When the enter button is pressed from the main menu, the display in Figure-4 is displayed.
When the down key is pressed, you can navigate through the menu, change the changeable
parameters, and only observe the parameters which are not changeable. You can change
the value at the cursor position. An overview of the keypad is shown in Figure-3.
UP Button: Used to change values. Pressing this key step by step increases the values.
Down Button: Used to change values. İt is work specific menus(letter changing etc.)
Enter Button: It is used to save the desired parameter value, to move to the other menu and
skip the line. When you change the parameter value, it comes to the last column of the value
and pressing the Enter key for a long time saves the parameter value than move on next sub
menu. After moving on the next menu it means the values you have changed are saved.
Back Button: It is used to navigate menus. When you push the button you can move on the
next menu or sub menu.
Down Button
Up Button
Enter Button
Fig-3: Keypad
Back Button

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Fig-4: PC1 IP Number
Fig -5: Tel Number Screen
Fig -6: ‘PC1 PORT NO’ Screen
The IP address of the server computer that will be
connected to PC1 IP and PC2 IP is entered in IPv4
format. It is used to send the alarm information and
instant information from the logger to the desired
time interval. The IP is entered between
000,000,000,000 …255,255,255,255.
Three different phone number can be entered in Tel1
No, Tel2 No and Tel3 No sections. Instant values are
periodically sent to these numbers. Also The alarm
information from the Logger device is sent to the
persons whose phone numbers are written here.
Enter the TC / IP Port number to be connected to two
server computers, ir PC1 PORT NO IP and ıla PC2
PORT NO ‘. Enter a value between 0 and 65535.

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GSM PORT NO: GPRS The TCP / IP port number is
entered in the modem server mode to connect the
computer program. Enter a value between 0 and
65535.
Fig -7: ‘GSM PORT NO’
GSM STATION : GPRS Modem station number. Enter
a value between 0 and 99999.
Fig -8: ‘GSM STATION’
SEND PERIOD: This is the period when the logger
sends the general info about station and the instant
values information to the server. The value entered is
in minutes and is between 0 and 9999.
Fig -9: ‘SEND PERIOD’ Screen
Control Bits: Control bits control SMS message
sending, SMS responses and ara GSM mode server
commands to the server computer. If the boxes are full
they are active, if it is not passive. If you skip the
column with the Enter key, the inside of the boxes can
be changed with the up key.
Fig -10: Control Bits
S1, S2, S3 bits: Used to send sms messages to phone numbers entered. The phone
numbers of the persons whose SMS message will be sent are shown in Figure-5.
P1, P2 bits: Used to send the instant values and status information on the Logger Device to
PC computers, PC1 and PC2.
SR: Used to send SMS messages and send SMS messages. If the modem is passive it
receives SMS message but does not reply again as SMS message.

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GS: This bit is activated if you want to work as a GSM modem. If this bit is active, Data can
only respond to calls and does not respond to incoming calls via the Internet.
APN NAME : Acsees Point is the name of the modem
required to enter the internet. The APN name differs
for each network. This APN name can be learned from
the service/simcard provider of the sim card to be
installed. A total of 14 characters can be entered in
numeric, characters, small and capital letters.
Fig -11: ‘APN NAME’ Screen
Fig -12: ‘USER NAME’
Fig -13: ‘PASSWORD’
2.2. Modul Info
USER NAME : This is the user name required for the
modem to enter the internet. The user name and
password can also be given when a special APN is
requested from the service/simcard provider. If not
requested, this place is left blank. Only the APN name
may be sufficient for the device to enter the Internet. A
total of 14 characters can be entered in numeric,
characters, small and capital letters.
PASSWORD : t is the password required for the
modem to enter the internet. Used with user name. If
requested from the service/simcard provider, the
password is written. If it is not requested, it is left
blank. Only the APN name may be sufficient for the
device to enter the Internet. A total of 14 characters
can be entered in numeric, characters, letters.
This menu contains information about the module. The values in this menu are for visual purposes only
and cannot be changed.
Serial No : GSM module Serial number
Fig-14: Serial Number Screen

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Model No : GSM module Model number
Fig -15: Model No
Mark Name : Manufacturer name of GSM module
Fig -16: Mark name
Version No : Software version of the GSM
module
Fig -17: Version no
Imei No : IMEI number of GSM module
Fig -18: Imei No

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3. MODEM START-UP
When the first power is supplied to the modem, the menu is shown on the LCD as
shown in Figure-19. The version number depends on the model of the connected logger
device.
AkiLGPRS-Vxx : Modem communicates with OEL-104.
AkPLVGPRS-Vxx : Modem communicates with Pluviograph.
ALogGPRS-Vxx : Modem communicates with Mini Data Logger, Radar ve PLT data loggers.
Fig-19: First Screen of the Modem
After this display menu, ’Modem Restart‘ is shown on the screen as shown in Figure-19 and the green
lamp starts to flash. At the same time, the red lamp also starts to burn once in a while. The red lamp
indicates that information is sent to the network. When Modem Restart is done, OKEY appears at the
bottom of the screen. If the ERROR message is displayed, the modem is not switched on and the green
lamp is not illuminated. The system automatically resets itself. After the system establishes a connection
to the network, OKEY message is displayed and the green lamp starts flashing at short intervals. If the
green lamp illuminates periodically, the modem will continue to operate and start to install itself. You can
follow the messages on the screen to see if the modem is switched on and connected to the network. If
the modem is in GPRS mode as shown in Figure-22, the main screen in Figure-23 will be displayed after
the modem has installed itself. If the modem is in GSM mode, the display shows GSM mode. In GPRS
mode, the display updates itself every minute. In this update, the modem checks the IP number and
whether it exits the server mode and updates the display. If the display shows server, the modem is
ready to be connected by the computer.
Fig-20, Fig-21, Fig-22: ‘OKEY’, ‘EROR-3’, ‘OKEY-2’ Massages

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If the main screen responds to all commands with ı
OKEY ’, the LCD screen will be displayed. If this
message is displayed, the modem is ready. If the
GSM MODE message is displayed on the screen,
the modem is ready to be connected.
Fig-23: ‘! SERVER !’ Massages
3.1 The Meaning of OKEY and ERROR Messages
OKEY-1: The modem has received its first command and communication with the modem is
complete.
ERROR-1: The module is defective. The green light of the modem is not blinking when the
message is received.
OKEY-2: The modem is ready to receive SMS messages. SIM card is ready to receive SMS.
ERROR-2: Sim card is not active for receiving for SMS.
OKEY-3: The modem has established the connection with the network and has received the initial
data from the network.
ERROR-3: The sim card installed in the modem is not connected to the network or the sim
card is not registered to the network. The green light of the modem is flashing for long
periods.
OKEY-4: Sım card ready to send SMS.
ERROR-4: The modem does not send SMS messages. You must contact the Sim Card
provider.
OKEY-5: Installation information about the modem SMS message has been prepared.
ERROR-5: The setup information for the modem SMS message could not be prepared.
OKEY-6: AT commands are allowed according to the module version.
ERROR-6: AT commands are not allowed according to the module version. Communicate with
AKIM Technical Service.
OKEY-7: Modem is able to access network information. (Network name, GPRS status and
Network quality etc.)
ERROR-7: Modem The network information has not been accessed. There is a problem with
the network connection (network name, GPRS status, and network quality, etc.). Communicate
with Sim Card Provider.

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OKEY-8: The modem accepts the setup information, APN name, User name and password
required to connect to the internet.
ERROR-8: The APN name is incorrectly entered. Check these values and turn the modem off and
on again.
OKEY-9: The modem has entered the Internet and has received the IP number from the network.
The modem is ready for use.
ERROR-9: The sim card is not registered.
3.1. SMS
“Msg. Reply” This means that information from the
modem is requested by SMS and the modem
responds to this request. If user sends SMS writing
RESET, the modem resets itself. If user sends Akim
level or AKIM LEVEL as a message the instant value
and station information are sent by modem.
Fig-24: Info. Requested by SMS
The content of the SMS message to be sent depends on the logger device. The SMS messages to
be sent to the devices are listed below. Write messages in quotation and send sms messages to
the modem phone number.
PLV Cihazı (AkPLVGPRS-Vxx) : “Akim yagis” “AKIM YAGIS” “Akim Rain” “AKIM RAIN”
OEL-104 (AkiLGPRS-Vxx) : ”Akim level” “AKIM LEVEL”
PLT, Radar, Mini Data Logger (ALogGPRS-Vxx): “Akim” “AKIM” “Reset” “Ac” “Kapa”
It means that TCP / IP(user computer) or data call
is made and connected to the modem.
Fig-25: PC-ToConnect Screen
3.2. Message Types Sent by Modem
When SMS messages are sent to GPRS modems, SMS messages are sent according to the
model of data logger. If the modem is not connected to the Logger devices or if there is a
problem with the loggers, the SMS to the user gets the “Data Logger Note Active”message.
Incoming SMS responses include logger information such as instantaneous values, current

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time / hour, station number, station name, region. The IP address of the modem and the port
number information comes as an SMS reply.
“AC”message must be sent to enable the relay's output, for disable KAPA message must be
sent.
PLV (AkPLVGPRS-Vxx) :
AKIM Pluviograph Bolge=021 Havza =021 Istasyon=087 Birim:0.2mm Toplam
Yagis=00000020 mm RTC=03/11/12 15:38:13 IP NO:188.xxx.xxx.xxx-80
Limnigraf Cihazı (AkiLGPRS-Vxx) :
AKIM LIMNIGRAF Zone=021 Observation =021 Station=087 Level=0082 cm RTC=03/11/12
15:38:13 IP NO:188.xxx.xxx.xxx-80

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2019