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Yuvi
Associate III
February 19, 2024
Question

Looking for information/details on WL55JC1 and B-L072Z LRWAN1.

  • February 19, 2024
  • 2 replies
  • 1442 views

Hello @STTwo-32  @ST Community 

Looking for information and details on this.

1) Currently I'm using B-L072Z LRWAN1 and I'm looking forward to using WL55JC1, using WL55JC1 CLASS B will increase my data rate?

2) Does WL55JC1 support CLASS B and as well as CLASS C? 

3) I got to know that a GPS-based gateway is required for CLASS B devices. So there can be specific requirements for CLASS C also?

Thank you.

2 replies

STTwo-32
STTwo-32
ST Technical Moderator
February 19, 2024

Hello @Yuvi 

1) The Data Rate depend on two parameters, bandwidth & spreading factor and not the board. This link give a simple explanation on that.

2) The LoRaWAN embedded in STM32WL is LoRaWAN L2 V1.0.3 compatible. The supported class are:

  • Class A for Unicast.
  • Class B synchronous transmission (thanks to beacon) for Unicast or Multicast.
  • Class C for continuous transmission for Unicast or Multicast.

3) For details about different Class requirements, take a look at the following link.

Best Regards.

STTwo-32 

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    Y
    YuviAuthor
    Associate III
    February 20, 2024

    Thank you for your reply @STTwo-32 

    1) I'm in Indian region(865-867), So the maximum bandwidth is 125KHZ and even when I'm operating at SF7 I'm getting maximum data rate of 768bps(24 frames of 240bytes payload). Please refer to this link for more details https://community.st.com/t5/stm32-mcus-wireless/not-getting-mention-speed-of-lorawan/m-p/639245#M17888

    Some people suggested that I use paid bands instead of free bands to get a better data rate(out of 8 India has 7 free bands), and other people suggested I take the v1.0.4 node to get more frames per minute.

    2) Can you suggest node v1.0.4.

    3) I have seen a few queries and questions on class B but no one has tried class C.

     

    STTwo-32
    STTwo-32
    ST Technical Moderator
    April 12, 2024

    Hello @Yuvi 

    1) I Think that paid bands may help getting better data rate. But the V1.0.4 will not give big difference.

    2)Our STM32WL is LoRaWAN L2 V1.0.3 compatible.

    3) I suggest you post on the Forum of our Third party.

     

    Best Regards.

    STTwo-32

    To give better visibility on the answered topics, please click on Accept as Solution on the reply which solved your issue or answered your question.
    Tesla DeLorean
    Tesla DeLorean
    Guru
    April 12, 2024

    You understand that LoRa radios can operate in point-to-point modes that's independent of LoRaWAN, its just another modulation scheme.

    If you've got to share resources, and connect to existing LoRaWAN infrastructure that comes with limitations and other users. It's designed for brief interactions, of small data packets, not continuous blasting of data at your sole convenience.

    Example, electric, gas or water meters reporting readings once or twice a day (perhaps 20-30 bytes, but thousands of meters), parking meters when cars arrive/depart a handful of times during the day, say for billing, or free space management/reporting.

    How much data do you have to move? At what speed? And for how long? What's the actual application?

    I'm not familiar with India's band licensing, but it other places it allows for a much more limited number of users/owners to provide some level of exclusivity, management and responsibility. And presumably policing of those offending the rules.

    GPS in gateways allows for accurate timing and synchronization, say TDM

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