Category Archives: IoT

Internet of Things

How to Change the Baud Rate of MOBITEK Q25 4G Modem

  1. By default, the baud rate for MOBITEK Q25 is “115200”.
  2. To change the baud rate of MOBITEK Q25 to another value and save it as default, MOBITEK Q25 needs to be connected to the PC using serial cable.
  3. Open Hyper Terminal, connect MOBITEK Q25 using “COM1” and set the baud rate to “115200”.
  4. Type “AT” in Hyper Terminal. If the response is “OK” then MOBITEK Q25 is successfully connected. If nothing can be entered in Hyper Terminal , then unplug and replug the serial cable to the serial port of the PC until “OK” is shown.
  5. In this example, the baud rate will be changed to “9600”. To do this, type “AT+IPR=9600;&W” in Hyper Terminal.

  6. At this point, nothing can be typed in Hyper Terminal because the baud rate setting has been changed from “115200” to “9600”.
  7. Disconnect MOBITEK Q25 from Hyper Terminal.
  8. Go to “File” -> “Properties”. In “Properties”, click on “Configure”. In “Port Settings”, change the baud rate to “9600”.
  9. Connect the MOBITEK Q25 to Hyper Terminal again. Enter “AT” and query the baud rate command. The baud rate should be changed to “9600”.

How to Upgrade or Downgrade the Firmware of MOBITEK Q25 4G Modem

Steps

  1. Run “QFlash v5.1”.
  2. Select the COM port number of “Quectel USB DM Port” (must use the USB port because serial port does not have “Quectel USB DM Port”).

  3. Set Baud Rate to 460800.
  4. Load Firmware Files.

  5. Upgrade firmware.

  6. Unplug the USB cable and plug it back. Use “AT+CMGR” or “ATI” to check the firmware version.

 

Download QFlash version 5.1

 

QFlash version 5.1 User’s Guide

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How to Reset or Reboot MOBITEK S80 Modem on an Interval

  1. The reset command “AT+WRST” can be issued in either hyper terminal or QCOM.
  2. When MOBITEK S80 modem is reset/reboot:-
    • the state of QCOM as follows:-
      • “Close Port” button turn to “Open Port”
      • “Send Command” and “Run” buttons are greyed out
      • No command can be send out
    • the state of Red LED status as follows:-
      • stop blinking
      • turn off
      • turn on
      • blinking
      • all the above completed in less than 10 seconds
    • SMS Engine — Enterprise Edition is able to re-initialize the modem

 

TEST RESULT

TEST OBJECTIVE TESTING METHODOLOGY TEST RESULT
Can MOBITEK S80 support schedule reboot? E.g. reboot on 1 p.m. every day? Not applicable
Can MOBITEK S80 reboot every 3 minutes? AT+WRST?

+WRST: 0

OK
AT+WRST=1,”000:03″

OK
AT+WRST?

+WRST: 1,”000:03″,”000:03″

OK

 The reset is set to start at “15:46”. By right the port will disconnect at:

  • 15:49
  • 15:52
  • 15:55

The state of QCOM when the modem disconnect:

  • “Close Port” button turn to “Open Port”
  • “Send Command” and “Run” buttons are greyed out
  • No command can be send out

At “15:49” the port closed (below s.c. is taken around 1 minute late).

Open the port again at “15:51”. At “15:52” the port closed (below s.c. is taken around 1 minute late).
Can SMS Engine — Ent. Ed. re-initialise MOBITEK S80 Modem after modem is reset?
  1. Stop the service/engine
  2. Use hyper terminal instead of QCOM ( because during remote support, you will use hyper terminal)
  3. Set the modem to reset every 3 or 5 minutes (AT+WRST=1,”000:03″)
  4. Start the service/enigne
  5. Check the log file, it should show that “GSM modem not connected” every 3 minutes then follow by “Modem ID 1 initialized”.

Not sure how frequent the engine will check for the modem’s connection. The reset duration happen in less than 10 seconds. Probably it missed the checking:

  • between 17:10 – 17:19
    • status missing at 17:13
    • status missing at 17:16
  • between 17:19 – 17:28
    • status missing at 17:22
    • status missing at 17:25

The last 3 “initialized” status show the disconnect interval are 3 minutes.
When modem is reset, what is the status of LED?
  1. Open Hyper Terminal, enter AT+WRST=1,”000:03″ command
  2. Start the engine
  3. Monitor LED status
 Red LED status when the modem reset (less than 10 seconds):

  • stop blinking
  • turn off
  • turn on
  • blinking

 

AT+WRST

AT+WRST only has the <MODE>,<DELAY>,<REMAINTIME>:

Issued: AT+WRST=1,"000:03"

Response: +WRST: 1,"000:03","000:03"

  • 1 = enable reset
  • “000:03” = reset every 3 minutes interval
  • “000:03” = countdown for the next reset (3 minutes). this countdown is still active even the port is disconnected.

Means:

  • AT+WRST is not able to do schedule reboot as we can’t specify the schedule time for the reset
  • AT+WRST is able to reset at any interval, i.e.: every 3 minutes
  • need to connect to the port again after every reset
  • the reset setting is always saved in the module even after every reconnection unless “AT+WRST=0” is issued

MOBITEK Sells Various Brands of GSM Modem

GSM modems are used in various industries. Different modem manufacturers implement different AT commands, therefore systems or applications cannot easily switch modem from 1 manufacturer to another.

We are pleased to inform you that we are able to supply GSM Modem from these manufacturers / brands:-

SIERRA WIRELESS FXT009 GSM Modem

WAVECOM GSM Modem

Maestro GSM Modem M100

Siemens GSM Modem MC55iT

Please contact us for further information.

How to Send MMS Using MOBITEK Q25 Modem

Note:-

  1. The correct AT commands for sending MMS is saved in “X:\Reports by Trainees\Taufiq\A20-T-30-4G Modem (Q25)\MMS\MMS Script.ini”.
  2. The MMS settings (AT+QMMSCFG=”mmsc”, AT+QMMSCFG=”proxy, etc.) cannot be saved using “AT&W”, the settings must be re-set after modem is rebooted.
  3. Must use QCOM instead of Hyper Terminal to upload image file.
  4. When MMS is successfully send, the response is “+QMMSEND: 0,200”

 

AT COMMANDS FOR MMS

Note: This script is located in “X:\Reports by Trainees\Taufiq\A20-T-30-4G Modem (Q25)\MMS\MMS Script.ini”. It must be executed one-by-one because the delay time is not set. Load the script in QCOM to use it. The MMS Settings used is MAXIS’s MMS Settings:

AT COMMAND DESCRIPTION
AT+CPIN? To enter a password or query whether or not the module requires a password.

If the reply is “+CPIN: READY”, meaning the module is not pending for any password.
AT+QICSGP=1,1,”unet”,”maxis”,”wap”,1 Configure parameters of a TCP/IP context.

AT+QICSGP=<contextID>,<context_type>,<APN>,<username>,<password>,<authentication>
AT+QIACT=1 Activate a PDP context.
AT+QIACT? OPTIONAL.

Return the list of the current activated contexts and their IP addresses:

+QIACT: 1,1,1,”100.66.207.181″

+QIACT: <contextID>,<context_state>,<context_type>,<IP_address>
AT+QMMSCFG=”contextid”,1 Set the PDP context ID.
AT+QMMSCFG=”contextid” OPTIONAL.

Query the PDP context ID.

+QMMSCFG: “contextid”,1
AT+QMMSCFG=”mmsc”,”http://172.16.74.100:10021/mmsc” Configure the URL of MMSC.
AT+QMMSCFG=”mmsc” OPTIONAL.

Query the URL of MMSC.

+QMMSCFG: “mmsc”,”http://172.16.74.100:10021/mmsc”
AT+QMMSCFG=”proxy”,”202.75.133.49″,80 Configure the proxy address and port of MMSC
AT+QMMSCFG=”proxy” OPTIONAL.

Query the proxy address and port of MMSC.

+QMMSCFG: “proxy”,”10.0.0.172″,80
AT+QMMSCFG=”sendparam”,6,2,0,0,2,4 Configure the sending parameters.

AT+QMMSCFG=”sendparam”,<valid>,<pri>,<sendrep>,<readrep>,<visible>,<class>
AT+QMMSCFG=”sendparam” OPTIONAL.

Query the sending parameters.

+QMMSCFG: “sendparam”,6,3,0,0,2,4
AT+QMMSEDIT=1,1,”+60174616341″ Add a phone number as a recipient.
AT+QMMSEDIT=1 OPTIONAL.

Query the recipient phone number.

AT+QMMSEDIT=1,1,”+60174616341″
AT+QMMSEDIT=4,1,”Test MMS” Edit the title of the MMS message.
AT+QMMSEDIT=4 OPTIONAL.

Query the title of the MMS message.

+QMMSEDIT: 4,”ASCII”,”Test MMS”
AT+QFUPL=”RAM:MOBITEK.jpg”,58773,60 Upload a file to RAM. The file will be saved as “MOBITEK.jpg” and the maximum size of file is 7708 bytes. 60 indicates timeout value, and 1 indicates ACK mode.

Wait for:

CONNECT

Then select the file to upload and click “Send File”:

The response after the file successfully uploaded:
+QFUPL: 7708,8fd3
AT+QFLST=”RAM:*” OPTIONAL.

Query all files in RAM.

+QFLST: “RAM:MOBITEK.jpg”,7708
AT+QMMSEDIT=5,1,”RAM:MOBITEK.jpg” Add attachments for the MMS message.
AT+QMMSEDIT=5 OPTIONAL.

Query the attachments.

+QMMSEDIT: 5,”RAM:MOBITEK.jpg”
AT+QMMSEND=5000 Send the MMS message.
AT+QFDEL=”RAM:*” Delete the RAM file.

Query all files in RAM.
AT+QFLST=”RAM:*” OPTIONAL.
AT+QMMSEDIT=0 Clear the content of the MMS message.
AT+QMMSEDIT=1 OPTIONAL.

Query the recipient phone number.
AT+QMMSEDIT=4 OPTIONAL.

Query the title of the MMS message.
AT+QMMSEDIT=5 OPTIONAL.

Query the attachments.