Purpose.. To send message to cell phone based on current sourced analog input 4-20ma Messages would be code embedded in Arduino mega Analog values would be 0 - 1023 Possible 100 messages, thus the large memory requirement Single cell number embedded in the sketch, SMS message So I was going to…

Equipment suggestions to build device that

system May 23, 2014, 2:58pm 3

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I can also use a 0-5v input signal, still needs Opto isolation