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Pradeep1
Pradeep1
Visitor II
October 18, 2018
Question

B-L072Z-LRWAN1 Discovery kit lora range issue. Range of less than 100 meters.

  • October 18, 2018
  • 6 replies
  • 1472 views

We are using B-L072Z-LRWAN1 Discovery kit for testing the range of LORA network. We have purchased 2 numbers of B-L072Z-LRWAN1 Discovery kits. We are using the factory default firmware provided with the kits. We have observed that the kits can communicate with each other only upto 100 meters. But as per the kits datasheet, we should get ranges of up to a dozen kilometers. We are testing the devices in city environment.

Are we doing anything wrong?

Is there any way to get the range as specified in the kit datasheets (over ranges of up to a dozen kilometers)?

  1. Kit 1 is powered with USB connector CN7.
  2. Kit 2 is powered with three AA 1.5V batteries. (SB37 removed to release the RESET).
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6 replies

T J
T J
Senior III
October 18, 2018

can you try batteries on both units ? with USB come noise...

you are in the city, do the units have clear line of sight ?

batteries... you need two new sets ... then retest.

Tesla DeLorean
Tesla DeLorean
Guru
October 18, 2018

If you can't see the location of the antenna you likely will have issues. With a clear sight line 12KM should be possible.

You can try to improve range by increasing the Spreading Factor (SF) and dropping the bandwidth. Both will result in a drop in bit rate. Semtech has a calculator to compute the rates that various settings will achieve.

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EmdSTM32WL
Associate II
January 11, 2024

Hello @Tesla DeLorean ,

I'm using two Nucleo boards  STM32WL55jc1 as Gateway and End device.

And I have some hundred of meters (300m) with SF11 , Freq 125Khz , TX Power 22dbi with this antenna 

link : GSM/GPRS Magnetic Antenna | Mikroe 

How can I increase the distance range , I'm based on ST Demo and I have not any Hw modification.

How can i increase the distance ?

 

Thank you.

Best Regards,

AScha.3
AScha.3
Super User
January 11, 2024

>How can i increase the distance ?

As Tesla said:

- clear sight line 

- increasing the Spreading Factor

- dropping the bandwidth

btw

I tried some y ago, with "optimum" settings, but no  "sight line" at all; between concrete buildings i got (from indoor /in house , first floor) -> walking the streets : about 200...400m . 

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