TOPIC: Modbus via MQTT

Hello, how can I change the data type of an MQTT tag?

I configured a tag as an array, the information I receive through MQTT is a modbus frame. I have tried to extract the Modbus data field using a script in ST, but I can't even copy the mqtt tag to another local variable. Anyone have any solutions?

Hello,

Sorry for the late answer. We didn't get notification about your request by E-mail.
As I understand you get answer like an array with Modbus response. You should use this tag like Array type and then work with it by scripts like this:


Best regards,
Ruslan

Thanks Ruslan

I already solved it, since the data came in json, I used the "substring" and "hextoint" instructions to extract the information.


Best regards
Planax