SL6087 Problem with echo cancellation

IoT Modules
1

Hello,

I try to switch echo cancellation on SL6087 and it doesn’t work with the latest batch of these modules. But it worked with previous batches. Have you any idea? Or firmware update?

Module that does not work:

  • at+wmsn<#0D>
  • at+wmsn<#0D><#0D><#0A>
  • Serial Number BE3220106006210<#0D><#0A><#0D><#0A>
  • OK<#0D><#0A>
  • at+cgsn<#0D>
  • at+cgsn<#0D><#0D><#0A>
  • 359193030299473<#0D><#0A><#0D><#0A>
  • OK<#0D><#0A>
  • at+cpin?<#0D>
  • at+cpin?<#0D><#0D><#0A>
  • +CPIN: READY<#0D><#0A>
  • ati3<#0D>
  • ati3<#0D><#0D><#0A>
  • R7.52.0.201306260837.SL6087 673436 062613 08:37<#0D><#0A><#0D><#0A>
  • OK<#0D><#0A>
  • at+wdop<#0D>
  • at+wdop<#0D><#0D><#0A>
  • Production Date (W/Y): 22/3<#0D><#0A><#0D><#0A>
  • OK<#0D><#0A>
  • at+whwv<#0D>
  • at+whwv<#0D><#0D><#0A>
  • Hardware Version 2.10<#0D><#0A><#0D><#0A>
  • OK<#0D><#0A>
  • at+wssw<#0D>
  • at+wssw<#0D><#0D><#0A>
  • FW_752_34_3.SL6087G 0000006CAE5DC7FF<#0D><#0A><#0D><#0A>
  • OK<#0D><#0A>
  • at+echo?<#0D>
  • at+echo?<#0D><#0D><#0A>
  • +CME ERROR: 3<#0D><#0A>
  • at+echo=?<#0D>
  • at+echo=?<#0D><#0D><#0A>
  • +CME ERROR: 3<#0D><#0A>

Module that does work

  • at+wmsn<#0D>
  • at+wmsn<#0D><#0D><#0A>
  • Serial Number BE4480141106210<#0D><#0A><#0D><#0A>
  • OK<#0D><#0A>
  • at+cgsn<#0D>
  • at+cgsn<#0D><#0D><#0A>
  • 354293066129712<#0D><#0A><#0D><#0A>
  • OK<#0D><#0A>
  • at+wdop<#0D>
  • at+wdop<#0D><#0D><#0A>
  • Production Date (W/Y): 48/4<#0D><#0A><#0D><#0A>
  • OK<#0D><#0A>
  • at+wssw<#0D>
  • at+wssw<#0D><#0D><#0A>
  • FW_752_34_3.SL6087G 0166006CAE5DC7FF<#0D><#0A><#0D><#0A>
  • OK<#0D><#0A>
  • at+echo?<#0D>
  • at+echo?<#0D><#0D><#0A>
  • +ECHO: 1,4,127,254,200,8192,128,1,328,16384,29491,7951,26214,984,512,512,256,128,256,400,10922,2048,8192,256,2048,32767,64<#0D><#0A><#0D><#0A>
  • OK<#0D><#0A>
2

Seems fw is different

3

Yes, I noticed that the FW is different. Any change to get the right FW verison for my SL6087?

4

You can check the ati3 of the working module

5

ati3 is the same for both SL6087 modules.

ati3<#0D>

ati3<#0D><#0D><#0A>
R7.52.0.201306260837.SL6087 673436 062613 08:37<#0D><#0A><#0D><#0A>
6

Can you check at+wcfm=2 in both module?

7

Not working:

  • at+wcfm=2
  • <#0D><#0A>
  • +WCFM: 0000,0<#0D><#0A><#0D><#0A>
  • OK<#0D><#0A>
  • at+wcfm=0,“0000”

  • <#0D><#0A>

  • OK<#0D><#0A>

    • at+wcfm=1,“0020”

  • <#0D><#0A>

  • +CME ERROR: 3<#0D><#0A>

  • at+wcfm=1,“0040”
  • <#0D><#0A>
  • +CME ERROR: 3<#0D><#0A>

Working:

  • at+wcfm=2
    <#0D><#0A>
  • +WCFM: 0166,0<#0D><#0A>
  • <#0D><#0A>
  • OK<#0D><#0A>
8

So there is difference on echo cancellation field

9

Thank you for identifiing the problem. How can I switch it on? The Manual “AT Command Interface Guide” says “This command is used only on request of Sierra Wireless”. Since this GSM module is very old and obsolete, can you please get me the password neede to enable this feature?

10

Probably you need to contact distributor directly.