Hello Everyone,

I am trying to connect with a mobile network (KPN) and a MQTT Broker and then send a message. I am using: 

• 1200 PLC
• CP1243-7 LTE
• Siemens MQTT driver (for 1200)

I have succeed in doing this, but the only problem is the stability. Sometimes I can connect straight away with the Mobile network and the Broker, but sometimes it takes very long or I get a timeout. I dont know what s causing the problem. Things that I have checked:

• Signal strength is good to medium
• I have the correct APN
• I am using the correct Hardware ID (277) at least, I think 
• Connection ID is 1 (not sure if this is correct, i have used different numbers but didn't make a difference)
• Local Port is 2000 (not sure if this is correct, i have used different numbers but didn't make a difference)
• Used different SIM cards (different providers) but no difference.
• No Errors in MQTT Driver block

If i setup the connection through TCP/IP from the PLC (so without the card and straight to wired internet) with the same settings the connection is effortless and works straight away.

I am not getting any errors from the online diagnostics from the card.

I am looking for an answer to this question too Danny! Thanks for it.

Let's see if someone has a good answer, also if you do find a solution let me know!

Thanks

Hello

perhaps you will find help in the Basic FAQ to this Topic:

https://support.industry.siemens.com/cs/de/en/view/109772284

Bye Murof