This topic to find solution for speed issue modems m.2 ( USB 3 ) OpenWrt System (SnapShot)
Modem Quectel RM551E and other modems , USB mode …
Where BPI-R4 using USB 3.2 support to 10GB/s
Note: Test Conducted on same location and same bands …Also conducted on different three systems (OpenWrt , ROOter & immortalWrt ) same issue with installed all packages
Where the speed :
on OpenWrt Router Board Banana BPI-R4 is 350 MB/s
Did you try RM521-F or RM520 on PCIE … As I know , people said it has same issue
The point here also when USB 3.0 or 3.1 or 3.2 can support a high speeds above 5GB/s …Why is limited speed on OpenWrt and other systems up to 400 or 350 mb/s on banana board BPI-R4
On other hand :
When I tested same modems RM521 RM520 FM190 RM551 on M.2 type C i’m getting around 900mb/s or 800mb/s almost full speed of the tower (Type C board m.2 Mcuzone)
if you think that the issue is related with Low USB3.0 speed, I think that you can verify it, plugin one U-Disk into the USB3.0 port. verify the speed that writing one big file.
It can be right place to ask here:
It is said that M.2 Key B port is both USB3.2 and PCIe3.0.
So, if a PCIe device is connected to this port (via mPCIe to M.2 KeyB converter/extender), can we expect that it will be discovered as pcie device via “lspci” command? And if the proper drivers exist will it work as expected?
Do we need something to switch between USB and pcie modes?
…Also conducted on different three systems (OpenWrt , ROOter & immortalWrt ) same issue with installed all packages
