Im designing a system for a farming application where i want to measure Temp/humidity/moisture at 6 places on the field (60 X 60 meters)
Then gather the data and send to a server and subsequently to a smartphone app. Get input from user and then turn the pump ON/OFF via a relay.
I have come up with a couple of design options
1) Use Sensors + MCU + GPRS module and send data directly to server from every sensor node in the field
2) Use Sensors + MCU + Zigbee to send data to a sink Node and from there I upload data via PI to server
Option 1 seems easier but i have read a lot of literature with option 2. Forming WSN with zigbee seems like a lot of work.
Can anyone provide feedback on the 2 options or suggest any other option ?