Olimex USB-glink slow speed

Hi,

I have a olimex USB-gLINK connected to an openwrt router. Works and connect to internet but the performance is not good, the speed test with iperf3 is realy low.

Olimex USB-glink iperf3 test.

Code:root@ohm:~# iperf3 -c iperf3.moji.fr -p 5200
Connecting to host iperf3.moji.fr, port 5200
[ 5] local 10.2.0.2 port 57620 connected to 45.147.210.189 port 5200
[ ID] Interval Transfer Bitrate Retr Cwnd
[ 5] 0.00-1.00 sec 768 KBytes 6.29 Mbits/sec 10 64.5 KBytes
[ 5] 1.00-2.00 sec 384 KBytes 3.15 Mbits/sec 9 48.7 KBytes
[ 5] 2.00-3.00 sec 384 KBytes 3.15 Mbits/sec 4 43.4 KBytes
[ 5] 3.00-4.00 sec 384 KBytes 3.15 Mbits/sec 7 35.5 KBytes
[ 5] 4.00-5.00 sec 256 KBytes 2.10 Mbits/sec 7 21.1 KBytes
[ 5] 5.00-6.00 sec 128 KBytes 1.05 Mbits/sec 4 15.8 KBytes
[ 5] 6.00-7.00 sec 0.00 Bytes 0.00 bits/sec 6 11.8 KBytes
[ 5] 7.00-8.00 sec 256 KBytes 2.10 Mbits/sec 2 9.21 KBytes
[ 5] 8.00-9.00 sec 0.00 Bytes 0.00 bits/sec 1 9.21 KBytes
[ 5] 9.00-10.00 sec 128 KBytes 1.05 Mbits/sec 0 13.2 KBytes
- - - - - - - - - - - - - - - - - - - - - - - - -
[ ID] Interval Transfer Bitrate Retr
[ 5] 0.00-10.00 sec 2.62 MBytes 2.20 Mbits/sec 50 sender
[ 5] 0.00-10.16 sec 2.29 MBytes 1.89 Mbits/sec receiver

iperf Done.The specs for that olimex USB-glink say that modem is capable of Speed - up to 150Mbps downlink and up to 50Mbps uplink. https://www.olimex.com/Products/IoT/...ource-hardware

When I test the same openwrt with an external router huawei-B310s that have same speed specs LTE FDD DL 150 Mbps, UL 50 Mbps https://www.manualslib.com/manual/13...?page=8#manual I have higher speeds.

External router iperf3 test.

Code:iperf3 -c iperf3.moji.fr -p 5200
Connecting to host iperf3.moji.fr, port 5200
[ 5] local 192.168.167.178 port 38890 connected to 45.147.210.189 port 5200
[ ID] Interval Transfer Bitrate Retr Cwnd
[ 5] 0.00-1.00 sec 1.12 MBytes 9.43 Mbits/sec 0 212 KBytes
[ 5] 1.00-2.00 sec 1.75 MBytes 14.7 Mbits/sec 2 192 KBytes
[ 5] 2.00-3.00 sec 1.75 MBytes 14.7 Mbits/sec 0 228 KBytes
[ 5] 3.00-4.00 sec 1.50 MBytes 12.6 Mbits/sec 0 247 KBytes
[ 5] 4.00-5.00 sec 1.50 MBytes 12.6 Mbits/sec 9 191 KBytes
[ 5] 5.00-6.00 sec 1.88 MBytes 15.7 Mbits/sec 0 207 KBytes
[ 5] 6.00-7.00 sec 1.50 MBytes 12.6 Mbits/sec 8 190 KBytes
[ 5] 7.00-8.00 sec 1.25 MBytes 10.5 Mbits/sec 0 166 KBytes
[ 5] 8.00-9.00 sec 1.00 MBytes 8.39 Mbits/sec 7 97.4 KBytes
[ 5] 9.00-10.00 sec 896 KBytes 7.34 Mbits/sec 8 69.8 KBytes
- - - - - - - - - - - - - - - - - - - - - - - - -
[ ID] Interval Transfer Bitrate Retr
[ 5] 0.00-10.00 sec 14.1 MBytes 11.8 Mbits/sec 34 sender
[ 5] 0.00-10.14 sec 13.5 MBytes 11.1 Mbits/sec receiver

iperf Done.The first thing I thought would be some configuration related to LTE-TDD and LTE-FDD.

I have checked the olimex USB-glink config but my knowledge is poor and seems all correct.

Code:root@ohm:~# socat - /dev/ttyUSB2,crnl
AT+QNWINFO
+QNWINFO: "FDD LTE","21404","LTE BAND 3",1675

AT+QCFG="band"
+QCFG: "band",0xbff,0x4,0x0I upload an image that shows the bandwidth used in openwrt, first part is the Olimex USB-glink then I disconnect it and connect the external router.

With that olimex I am not capable of get more than 1.4 Mbps sustained downloading files.

What more can I try? Thanks in advance.

Viel.
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