Skip to main content
Home
for DLMS smart meters

Main navigation

  • Home
  • Products
  • About us
  • Open Source
  • Community
  • Forum
  • Downloads
User account menu
  • Log in

Breadcrumb

  1. Home
  2. Forums
  3. Error When Opening a Connection

Error when opening a connection

Forum Rules

Before commenting read Forum rules

Don't comment the topic if you have a new question.

You can create a new topic selecting correct category from Gurux Forum and then create a new topic selecting "New Topic" from the top left.

By kobe, 22 August, 2017
Forums
Gurux.SMS

Hello,

Today I tried to find some code to control a sms modem of schneider electric, with at commands and c#. i tried to use this library but everytime I open the connection, the error "Pin is needed" is shown.

I had a look in the source code and it seems to be a problem in the code sheet GXSMS.cs, in the open method the program sends the AT command "AT+CPIN?\r" at line 1196. Then the modem replys with "+CPIN: READY", the code also waits to get this command but there is a problem there. The SendCommand method seems unable to give this as a reply, because there is no OK in this reply.

Is my modem not following an agreement, that states an OK is needed?
Is this maybe a bug in the code?
This seems critical to me, do other modems give a different reply?

Can someone have a look at this?
At the moment I have changed the code so the READY command is accepted without OK.

Kind regards.

Profile picture for user Kurumi

Kurumi

8 years 5 months ago

Error when opening a connection

Hi,

We tested this with few modems. All are returning OK at the end:
AT+CPIN?
+CPIN: READY
OK

Are you receiving \r\n after READY?
BR,

Mikko

  • Create new account
  • Reset your password

Hire Us!

Latest Releases

  • Sun, 02/01/2026 - 19:47
    gurux.dlms.cpp 9.0.2602.0101
  • Tue, 01/20/2026 - 10:38
    gurux.dlms.java 4.0.89
  • Wed, 01/14/2026 - 14:29
    Gurux.DLMS.Python 1.0.196
  • Mon, 12/29/2025 - 10:38
    Gurux.Serial.Android 3.0.5
  • Mon, 12/15/2025 - 08:11
    Gurux.DLMS.Net 4.0.87

New forum topics

  • Issue with KWH Value Reading Using Gurux DLMS Library.
  • CEWE Prometer 100
  • Kaifa Meter Communication via Android Application
  • OnePassDiffieHellman Key Agreement Not Working in GXDLMSDirector GUI
  • Parse compact frame CF49
More

Who's new

  • AsadAF
  • 1983sedat
  • Ebrahim
  • dur00995
  • Catalin
RSS feed
Privacy FAQ GXDN Issues Contact
Follow Gurux on Twitter Follow Gurux on Linkedin