old_contents: #!/usr/bin/env python
  #Communication method with gateway via LoRa.
  #Uart port drive LoRa module.
  #Parse JSON between device and gateway via LoRa channel.
  
new_contents: #!/usr/bin/env python
  #Communication module: LoRa.
  #Communication method with gateway via LoRa.
  #Uart port drive LoRa module.
  #Parse JSON between device and gateway via LoRa channel.
  
subject: Update comm.py