SIEMENS S7-1200 and JSON format

[boros000]

Hello all,
I have a small project to implement a HTTP_GET Function in S71200 to get a JSON formatted string from Ethernet partner and stock it in the FB's static parameter.
How can I start to work on it?
Yes, I already searched google.
Thank you.

 

[mk42]

I've never done much with the HTTP protocol or JSON, but you should probably start with looking at the TSEND/TRECV blocks. Those are the blocks in the 1200 for sending/receiving arbitrary TCP/IP data.

I think that most people have the best luck implementing protocol parsers in SCL, which is a pascal based language. It isn't object oriented, but it supports if/then, for/next, select/case, etc. It would probably be possible to do in ladder, but it would be much messier.