Hello all,

I'm using a S7-1511-1 PLC with TIA Portal v16 and I'm trying to sent a JSON message to a server from customer using block LHTTP_post/Put with TLS included. I found that when I tried to do this, I always get a 16#8601 error, which may be a lot of things at the same time, but I thing it may be something about the security, specifically the certificates. When tested with Postman, everything goes well, so looks like it's only on the PLC side.

I'm following the procedure to install certificates showed in the Send messages to Telegram example with no results, however there are a couple differences: in TIA V17 (the example), there is a PLC hardaware "box" for connection mechanisms to select a certificate, which there is not in V16. Maybe this is an important changer?

https://support.industry.siemens.com/cs/document/109763879/sending-and-receiving-messages-with-messenger-services-as-demonstrated-with-telegram-?dti=0&lc=en-AF

Also, in the example a chain certificate is downloaded from API, but when importing it to the hardaware, only one is selected, while if I do this, have Root, intermediate, and final certificate...which one should I use?

I thin the answer may be here, but not entirely sure anyway...

Sorry for the long post, but I'm trying to do use this in a project soon to be, I'm kind of desperate and there is not much information available.

Thanks.

Hello Jodossantos2

I think you have to work with root certificate as shown in the mentioned FAQ

https://support.industry.siemens.com/cs/ww/en/view/109763879

Chapter 2.3.2

Bye Murof