How to make Device work 24/7 without human intervention? ?

Other Hardware Home Automation
1

I Made a PCB which has

  1. Atmega328p-pu
  2. SIM800L
  3. Lm2596 based power supply gives 4v 2A to GSM
  4. BMP180
    5)LCD16*2
    This board is connected to BLYNK server, It worked properly for two days,every second it pinged proper sensor data to BLYNK server, but today It was disconnected from network, Then I had to manually restart the Device, it again started to work normally, but I don't want to Do this manually , I want to use this in Agricultural field, how to make it work forever without human intervention ?

I want to know

  1. How IOT Product manufacturers solve these kind of problem
  2. Do I need to use Reset & supervisor IC?
  3. Do I need to turn off and On every hour using RTC?
2

Is it your own BLYNK server? If it's not, are they ok with data being sent so rapidly? I'm hard pressed to think of anything in an agricultural setting that needs such a refresh rate.

Put some debugging prints in there and see where it fails.