# Automatic phone call, sms or email when a Modbus TCP register is changing state?

**URL:** <https://forumautomation.com/t/automatic-phone-call-sms-or-email-when-a-modbus-tcp-register-is-changing-state/8226>\
**Category:** Software and Tools\
**Tags:** androidtools, modbus\
**Created:** [May 1, 2020, 11:29pm UTC](https://forumautomation.com/t/automatic-phone-call-sms-or-email-when-a-modbus-tcp-register-is-changing-state/8226 "2020-05-01T23:29:59Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![brophy](https://forumautomation.com/letter_avatar_proxy/v4/letter/b/c77e96/32.png) [@brophy](https://forumautomation.com/u/brophy)\
**Post date:** [May 1, 2020, 11:30pm UTC](https://forumautomation.com/t/automatic-phone-call-sms-or-email-when-a-modbus-tcp-register-is-changing-state/8226/1 "2020-05-01T23:30:00Z")

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Last year I developed an android alarm system which called, send SMS or email automatically whenever an ONVIF camera detect motion. Last month I read about modbus TCP old technology. So I put that into my code so that a change of state of a Coil, Input or register could trigger an alarm as well. Before I put more effort I like to ask whether it might be useful. Here is the link of the modbus TCP [android modbus TCP](http://graphtoweb.com/alarm/international/modbus.en.html)

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