You could probably do the same thing with an alphanumeric pager. The Motorola Advisor, for example, had a stand that you put it in and it had an RS-232 output. You would have to have some other device/computer to strip off the date stamp, etc. and just deliver the text you want to the controller. This device could also incorporate a password that would only let valid commands through. Everything else would be deleted.
Joe -------------- Original message -------------- From: "IM Ashford" <[EMAIL PROTECTED]> > This sounds perfect for a backup control system. > However, using mobile phone/gsm to control primary systems > has the following problems. > > 1) Latency - texts can sometimes be late.I have known a delay of 24 hours > during Christmas and new year peaks. >
