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Quote from: Barry Fields on Today at 11:26:47 AMCan a Modbus unit respond to two unique addresses? (for writes only)
IE 1st unit addresses 10 & 11
2nd unit 10 & 12
3rd unit 10 & 13
all would respond to address 10 (conference call)
each would respond to 11 or 12 or 13 (private line)
Quote from: ClassicCrazy on Today at 09:23:20 AMThe broker can be living at your house on a raspberry pi ( that is how I do mine) or the mqtt data can be sent to a broker server out on the internet somewhere.
Quote from: ClassicCrazy on Today at 09:23:20 AMI can't explain to you exactly why the Classic can only connect to one IP modbus at a time - limitation of the hardware I suspect.
Larry
Quote from: Barry Fields on Today at 12:17:10 AMYour post was really appreciated and kept me out of the bar for a couple of hours.I can't explain to you exactly why the Classic can only connect to one IP modbus at a time - limitation of the hardware I suspect.
I am really trying to understand the interconnections. I have attached a crude diagram of what I think I understand.
How does MQTT get to the cloud? Ethernet to the router?
"Basically the Classic had limitation of being able to only have one modbus link at a time." Explain please.
Feel free to edit my diagram iffn ya like.
Quote from: Barry Fields on May 23, 2024, 10:23:16 AMIn the simplest of terms that an elderly Tennessee Hillbilly can understand:
What is the issue the Combox is intended to resolve?
Quote from: ClassicCrazy on May 23, 2024, 03:47:39 PMThis was software project that Graham created for the Classic. It is explained on page linked below. Basically the Classic had limitation of being able to only have one modbus link at a time. And that link had to be local or some kind of ip tunnel or whatever. The project linked made it so that something like a raspberry pi could connect to the Classic, and then publish the Classic data as MQTT . Those mqtt packets are easy to send out either locally via pi , or to external source. You don't need to open any ports on your router or do anything magic networking wise. Once the data is in mqtt form - as many clients as you want can get that data at the same time which got rid of the only one connection at a time limitation. Here is the link so you can see the graphic that Graham had made about it. https://github.com/ClassicDIY/ClassicMQTTYour post was really appreciated and kept me out of the bar for a couple of hours.
I use it via a raspberry pi with my classics and it is stable and never crashes.
https://github.com/ClassicDIY/ClassicMQTT
Larry