Evaluation board and AT response failure

IoT Modules Legacy HL Series
1

Dear All,

At this moment we are testing the HL series evaluation board on Windows 10 and installed the drivers. We use the the USB1_Main connector which gives about 5 COM ports (no idea why around 5). Last week it worked nice with hypertherminal.

A few days later we installed drivers for our USB->Serial converter from FTI (UT232R). Not used for the evaluation board.

Now we are testing some AT command to our evaluation board (via the USB1_Main, UT232R disconnected form PC) but the response now has a lot of garbage.

Response of AT+IPR=?

ùé-[y[AT+IPR=?éù“F“-[y\
+IPR: (),(300,1200,2400,4800,9600,19200,38400,57600,115200,230400,460800,500000,
750000,921600,1843200,3000000,3250000,6000000)
Fù-[y\
OK

Does someone know why?

Resetted PC and evaluation board but nothing helps.

2

Hi,

There are a couple of possible reasons.

  • Did you use CMUX before? If so the garbage characters could be the control characters around the serial data.
  • You might be connecting to the wrong serial port that has been enumerated, they all look like com ports but have different functions. As per the AT command manual (at+kusbcomp) there are different configurations (shown below), 0 is the default.

0 7 CDC-ACM mode, (PID: 0x0020)
USB0 – AT / NMEA / modem port
USB1 – Mobile Analyzer traces port
USB2 – 3G traces port
USB3 – AT / NMEA / modem port
USB4 – AT / NMEA / modem port
USB5 – AT / NMEA / modem port
USB6 – On-chip traces port
1 3 CDC-ACM and 3 CDC-ECM mode, (PID: 0x0302)
ECM1 – Network adapter port
ECM2 – Network adapter port
ECM3 – Network adapter port
USB1 – AT / NMEA / modem port
USB2 – Mobile Analyzer traces port
USB3 – 3G traces port
2 5 CDC-ACM and 1 CDC-ECM mode, (PID: 0x0303)
ECM1 – Network adapter port
USB1 – AT / NMEA / modem port
USB2 – Mobile Analyzer traces port
USB3 – 3G traces port
USB4 – AT / NMEA / modem port
USB5 – AT / NMEA / modem port

Regards

Matt

3

Thank you for your answer. That clears a lot.

No I didn’t use CMUX before, do you know where I can find info about the control charters?

Where can I find more info on the usages of the different ports (like 3G traces, AT, NMEA and modem ports)?

I want to send data over a TCPIP link.

4

Hi,

The control characters are a bit odd, I am not sure why you are seeing them if not for one of the reasons below, you will need to contac your local tech support to delve a little deeper.

Re the IP connection, I presume you want to use the on board IP stack? I have attached a zip file with a couple of terterm scripts which should help you see how to do this.

Regards

Matt
HL8 connectivity scripts.zip (975 Bytes)

5

Hi Matt,

Thanks! I will try with the scripts. I will use the on board IP stack. Unless it’s not suitable for me. My uC does probably not support CDC-ECM only ACM so I have to see how to solve.

With kind regards,

Wilco