we will have to start a business for precision farming. our system developed with arduino + rtc shield + relay + hygrometer + dht22 etc. It interfaces with an App for Android or Ios, to visualize the sensor data, to write on the LCD the steps of the automaton for precision irrigation. It will also be possible to activate the relays to the pin connected on the arduino with the button. Regarding the connection I was thinking of using a m2m system with a 2-3-4 / g sim. Each user connects to their system with a different sim card, and for this they need an app that connects with their own arduino.
a similar app preesistent is Blynk.
See you soon
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Hi, Greetings!! We have huge experience of working on Arduino. Please chat with us so that we can discuss further Looking forward to your response Thanks & Regards, Subasini