CubeCell (HTC-AB01) LoRaWAN OTAA user defined data rate

#1

I am using testing the CubeCell in Australia using OTAA on AU915. I have gateways in close proximity and and am seeing good reception. I want to specify the DR to be used to enable me to send payloads greater than 51 bytes. I am using the LoRaWAN.ino demo application modified to send payloads from 1 to 128 bytes.

Depending on the successful join OTAA join request, I am limited to either 51 bytes or 128 bytes maximum payload size depending on the data rate.

How can I specify I only want to use a specific DR to be able to supports more that 51 bytes payloads?

#2

Hi

The 51 bytes is defined by LoRaWAN protocol.

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There are two suggestions, you choose one of they and have a try.

  1. Try to change 51 here to a value below 256 (This may cause some problem);
  2. In the .ino file, enable DR4 by follow this setting, the DR4 channel have 500K bandwidth, bu by default, the DR4 is disable.
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    image.png733×60 2.93 KB

If your node join success in DR4, then it will working in DR4 all the time and allow you send data max to 242 bytes.

#3

Possible Solution: Send two or three packets! The application can assemble the message.

Or just try to minimse the data! So possible you can only send the difference between two values!

E_T

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