2022-05-24 02:53 AM
Hi
i'm just sitting and messing with a few lora boards.
I find that nucleo-WL55JC1 has approx 10dbm RSSI better than seeed LoRa-E5, and that nucleo-WL55JC1 also transmits with a more powerful signal, what is your experience ??
with best regards
Solved! Go to Solution.
2022-06-07 01:38 AM
i found the error, it was the clock domain for the one gpio pin that was not right, so the one gpio did not work .. :)
my measurements if anyone could be interested ..
Nucleo is a littel bit better.
2022-05-24 03:16 AM
How, exactly, are you determining that?
What, exactly, do you mean by, "seeed LoRa-E5" - a board? a module?
https://www.seeedstudio.com/LoRa-E5-Wireless-Module-p-4745.html
Antennas are bidirectional - so you'd expect better performance in Rx to be reflected in better Tx.
2022-05-24 03:35 AM
I'm using the E5 mini Dev-board.
2022-05-24 03:58 AM
So this: https://www.seeedstudio.com/LoRa-E5-mini-STM32WLE5JC-p-4869.html ?
What happens if you swap antennas between this & the Nucleo?
If the improvement follows the antenna, then you have your answer!
2022-05-24 05:10 AM
Yes, and I get the same result with both antennas.
2022-06-07 01:31 AM
Hello @spa23 ,
It's difficult to say if this is normal to have around 10 dBm less in reception because we do not compare the same board, and maybe even not the same package.
We can have differences between 2 boards depending of the matching design network so it's difficult to tell you where is located with precision the difference between those two boards.
Regards
2022-06-07 01:38 AM
i found the error, it was the clock domain for the one gpio pin that was not right, so the one gpio did not work .. :)
my measurements if anyone could be interested ..
Nucleo is a littel bit better.
2022-06-07 01:53 AM
Thanks for the update.
How does a GPIO pin mis-configuration affect RSSI?
Please mark the solution:
2022-06-07 01:55 AM
Because that it was one of the rf switch control pins, so the rf switch never switched.
2022-06-07 02:04 AM
Aha - that'd do it!