Minimum send interval for LoRaWAN

WisBlock
1

@bigdatasheep

I am using rak4631 to send data to the gateway through lora. I have a little doubt about Lora transmission interval. The default is #define LORAWAN_APP_INTERVAL 20000. But I want to know what is the minimum value that can be set?

LoRaWAN transmission:

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The minimum send interval depends on several factors:

  • The LoRaWAN region you setup
  • The data rate you setup
  • The size of the data you are sending
  • Whether you have enabled confirmed packets or not

==> This has an influence on how much time a transmission from the end node to the LoRaWAN server takes.

LoRaWAN regions can have different delays for the RX1 and RX2 windows.
The transmission time depends on your packet size and the selected data rate
If confirmed packet mode is setup, it can be that the TX is only received in RX2 window.

I cannot give you a specific minimum send interval.

Personally I always try to stay above 10 seconds.

But I am sure there are experts here that can give you more details.

2

I’m sorry I didn’t provide enough information about the minimum sending interval factor you mentioned, but here are my Settings:

  • The LoRaWAN region is LORAMAC_REGION_CN470

  • The size of the data is 36 Byte

  • Disabled confirmed packets
    Regarding data rate Settings, I don’t know where to look, I am using Lora sample code for rak4631.

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