M2M Machine to Machine

GSM modem with watchdog

Industrial GSM modem with watchdog

GSM modem front view

GSM modem front

• RS232 on D-SUB9
• Three status LED

GSM modem back view

GSM modem back

GSM modem back

• Antenna interface SMA/F
• SIM card holder push / push
• I/O interface with 6 pins (functions differs on the version of the GSM modem)
• Power connector with 4 pins, 8 to 36 DC, inverse voltage protection
• Back up battery (option)
• Python interpreter
• Operation as standard AT modem with watchdog and or battery
• Operation as low cost PLC (programmable logic controller) replacement and program code on licence free Python language

GSM modem general

• Temperature range: -25 to 70 degree Celsius
• Enclosure: 57 x 87 x 27 (mm), aluminium
• EN 55011 class A, EN 61000-6-1, IP20
• Quadband GSM / GPRS 850/900/1800/1900 GPRS class 10
• Embedded TCP/IP, UDP/IP, FTP, SMTP
• SMS, data, fax, DTMF
• Several types of hardware watchdog

GSM modem unique features

• Reboot each 4 to 24 hours (by jumper)
• Watch dog of the Python code by external micro controller ( by jumper)
• Reboot of the GSM modem by command on RS232 ( by jumper)
• Emergency battery inside (hardware option)
• Secured against vibration by snap in connectors
• Ready to use Python programs for different tasks
• Free of charge tools to write and upload own Python programs
• Local technical trainings for coding in Python (on request)
• Test server to upload data logged or collected by GPRS (HTML, TCP/IP)

GSM modem block diagram

GSM modem with watchdog and battery

GSM modem family

GSM modem standard

• Digital input with optical coupler 0 to 28  VDC =4
• Output relay 1 A , 60 VDC
• I2C bus for external extension= No
• Back up battery = No

GSM modem with battery

• Digital input with optical coupler 0 to 28 VDC =4
• Output relay 1 A , 60 VDC
• I2C bus for external extension= No
• Back up battery = No

GSM modem with I2C bus and no battery

• Digital input with optical coupler 0 to 28 VDC =2
• Output relay 1 A , 60 VDC
• I2C bus for external extension= Yes (1)
• Back up battery = No

GSM modem with I2C bus and battery

• Digital input with optical coupler 0 to 28 VDC =2
• Output relay 1 A , 60 VDC
• I2C bus for external extension= Yes (1)
• Back up battery = Yes

GSM modem application examples

Burglar alarm, monitoring of server room, standard AT modem with watchdog, operating hour timer of machines, remote control, remote monitoring, fault detector, data logger … and a lot of more

If you have interest in this GSM modem made by a business friend of mine then just drop an email to harald.naumann (at) gsm-modem.de or use the form to get further details.

3 Responses to “GSM modem with watchdog”

Comment from shahzad
Time October 11, 2011 at 2:30 PM

please send me more details and pricing and the monitoring software

Comment from Shane Dowd
Time October 18, 2011 at 9:44 PM

Hello Harald,

It would seem that the last link you posted has worked for me. Very interesting looking product. I would be grateful for further details about the unit if you have them and proicing information.

Best regards,
Shane