{"id":2782,"date":"2011-07-05T15:10:23","date_gmt":"2011-07-05T13:10:23","guid":{"rendered":"http:\/\/www.gsm-modem.de\/M2M\/?p=2782"},"modified":"2011-07-16T22:27:04","modified_gmt":"2011-07-16T20:27:04","slug":"gsm-modem-with-watch-dog","status":"publish","type":"post","link":"http:\/\/www.gsm-modem.de\/M2M\/iot-gallery\/gsm-modem-with-watch-dog\/","title":{"rendered":"GSM modem with watchdog"},"content":{"rendered":"<h2>Industrial GSM modem with watchdog<\/h2>\n<h3>GSM modem front view<\/h3>\n<div id=\"attachment_2779\" style=\"width: 310px\" class=\"wp-caption alignnone\"><a rel=\"attachment wp-att-2779\" href=\"http:\/\/www.gsm-modem.de\/M2M\/?attachment_id=2779\"><img aria-describedby=\"caption-attachment-2779\" decoding=\"async\" loading=\"lazy\" class=\"size-medium wp-image-2779 \" title=\"GSM-modem-F\" src=\"http:\/\/www.gsm-modem.de\/M2M\/.\/wp-content\/uploads\/2011\/07\/GSM-modem-F-300x161.jpg\" alt=\"GSM modem front\" width=\"300\" height=\"161\" \/><\/a><p id=\"caption-attachment-2779\" class=\"wp-caption-text\">GSM modem front<\/p><\/div>\n<ul>\n<li>RS232 on D-SUB9<\/li>\n<li>Three status LED<\/li>\n<\/ul>\n<h3>GSM modem back view<\/h3>\n<div id=\"attachment_2780\" style=\"width: 310px\" class=\"wp-caption alignleft\"><a rel=\"attachment wp-att-2780\" href=\"http:\/\/www.gsm-modem.de\/M2M\/m2m-gallery\/gsm-modem-with-watch-dog\/attachment\/gsm-modem-b\/\"><img aria-describedby=\"caption-attachment-2780\" decoding=\"async\" loading=\"lazy\" class=\"size-medium wp-image-2780\" title=\"GSM-modem-b\" src=\"http:\/\/www.gsm-modem.de\/M2M\/.\/wp-content\/uploads\/2011\/07\/GSM-modem-b-300x131.jpg\" alt=\"GSM modem back\" width=\"300\" height=\"131\" \/><\/a><p id=\"caption-attachment-2780\" class=\"wp-caption-text\">GSM modem back<\/p><\/div>\n<dl id=\"attachment_2780\" style=\"width: 310px;\">\n<dt> <\/dt>\n<dd>GSM modem back<\/dd>\n<\/dl>\n<ul>\n<li>Antenna interface SMA\/F<\/li>\n<li>SIM card holder push \/ push<\/li>\n<li>I\/O interface with 6 pins (functions differs on the version of the GSM modem)<\/li>\n<li>Power connector with 4 pins, 8 to 36 DC, inverse voltage protection<\/li>\n<li>Back up battery (option)<\/li>\n<li>Python interpreter<\/li>\n<li>Operation as standard AT modem with watchdog and or battery<\/li>\n<li>Operation as low cost PLC (programmable logic controller) replacement and program code on licence free Python language<\/li>\n<\/ul>\n<h3>GSM modem general<\/h3>\n<ul>\n<li>Temperature range: -25 to 70 degree Celsius<\/li>\n<li>Enclosure: 57 x 87 x 27 (mm), aluminium<\/li>\n<li>EN 55011 class A, EN 61000-6-1, IP20<\/li>\n<li>Quadband GSM \/ GPRS 850\/900\/1800\/1900 GPRS class 10<\/li>\n<li>Embedded TCP\/IP, UDP\/IP, FTP, SMTP<\/li>\n<li>SMS, data, fax, DTMF<\/li>\n<li>Several types of hardware watchdog<\/li>\n<\/ul>\n<h3>GSM modem unique features<\/h3>\n<ul>\n<li>Reboot each 4 to 24 hours (by jumper)<\/li>\n<li>Watch dog of the Python code by external micro controller ( by jumper)<\/li>\n<li>Reboot of the GSM modem by command on RS232 ( by jumper)<\/li>\n<li>Emergency battery inside (hardware option)<\/li>\n<li>Secured against vibration by snap in connectors<\/li>\n<li>Ready to use Python programs for different tasks<\/li>\n<li>Free of charge tools to write and upload own Python programs<\/li>\n<li>Local technical trainings for coding in Python (on request)<\/li>\n<li>Test server to upload data logged or collected by GPRS (HTML, TCP\/IP)<\/li>\n<\/ul>\n<h2>GSM modem block diagram<\/h2>\n<div id=\"attachment_2823\" style=\"width: 590px\" class=\"wp-caption alignnone\"><a href=\"http:\/\/www.gsm-modem.de\/M2M\/?attachment_id=2823\"><img aria-describedby=\"caption-attachment-2823\" decoding=\"async\" loading=\"lazy\" class=\"size-medium wp-image-2823\" title=\"GSM-modem-with-watchdog\" src=\"http:\/\/www.gsm-modem.de\/M2M\/.\/wp-content\/uploads\/2011\/07\/GSM-modem-with-watchdog1-221x300.png\" alt=\"GSM modem with watchdog and battery\" width=\"580\" height=\"786\" \/><\/a><p id=\"caption-attachment-2823\" class=\"wp-caption-text\">GSM modem with watchdog and battery<\/p><\/div>\n<h2>GSM modem family<\/h2>\n<h3>GSM modem standard<\/h3>\n<ul>\n<li>Digital input with optical coupler 0 to 28\u00c2\u00a0 VDC =4<\/li>\n<li>Output relay 1 A , 60 VDC<\/li>\n<li>I2C bus for external extension= No<\/li>\n<li>Back up battery = No<\/li>\n<\/ul>\n<h3>GSM modem with battery<\/h3>\n<ul>\n<li>Digital input with optical coupler 0 to 28 VDC =4<\/li>\n<li>Output relay 1 A , 60 VDC<\/li>\n<li>I2C bus for external extension= No<\/li>\n<li>Back up battery = No<\/li>\n<\/ul>\n<h3>GSM modem with I2C bus and no battery<\/h3>\n<ul>\n<li>Digital input with optical coupler 0 to 28 VDC =2<\/li>\n<li>Output relay 1 A , 60 VDC<\/li>\n<li>I2C bus for external extension= Yes (1)<\/li>\n<li>Back up battery = No<\/li>\n<\/ul>\n<h3>GSM modem with I2C bus and battery<\/h3>\n<ul>\n<li>Digital input with optical coupler 0 to 28 VDC =2<\/li>\n<li>Output relay 1 A , 60 VDC<\/li>\n<li>I2C bus for external extension= Yes (1)<\/li>\n<li>Back up battery = Yes<\/li>\n<\/ul>\n<h3>GSM modem application examples<\/h3>\n<p>Burglar alarm, monitoring of server room, standard AT modem with watchdog, operating hour timer of machines, remote control, remote monitoring, fault detector, data logger &#8230; and a lot of more<\/p>\n<p>If you have interest in this GSM modem made by a business friend of mine then just drop an email to <span style=\"color: #0000ff;\"><strong>harald.naumann (at) gsm-modem.de<\/strong><\/span> or <strong><span style=\"color: #0000ff;\"><a href=\"..\/..\/contact-me\/\"><span style=\"text-decoration: underline;\">use the form<\/span><\/a> <\/span><\/strong>to get further details.<\/p>\n<div class=\"shariff shariff-align-left shariff-widget-align-left\"><ul class=\"shariff-buttons theme-default orientation-horizontal buttonsize-small\"><li class=\"shariff-button twitter shariff-nocustomcolor\" style=\"background-color:#595959\"><a 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