http://forum.infiniteautomation.com/forum/posts/list/13.page JForum - http://www.jforum.net http://forum.infiniteautomation.com/forum/posts/preList/311/1432.page http://forum.infiniteautomation.com/forum/posts/preList/311/1432.page GMT http://forum.infiniteautomation.com/forum/posts/preList/311/1435.page http://forum.infiniteautomation.com/forum/posts/preList/311/1435.page GMT

I used the schedule to fire once a day to feed an event to set the time into the given setpoint to be sent to the slave.

What I wanted was to use the softpoint to do it. e.g. CRON once a day, then set the the time for all slave devices. e.g. p.value = timestamp. Alas, this cannot be done at the softpoint level. It seems I have to create a schedule time event for each slave, then a event handler for each schedule event.

Another option is that I can change the arduino code to deal with slave ID of 0 and implement a broadcast write. Will Mango deal with broadcasts and if it does what doe it expect back?

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I suppose hack my ardiunos to take address 1 as a "broadcast" rather than the standard 0 address and hardcode only one device to send a response back.

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http://sites.google.com/site/jpmzometa/arduino-mbrt/arduino-modbus-slave

It works OK to get data, but when I try to set data I get an error message. Probably the modbus command used isn't supported by the Arduino library. Looks like you use one that does.

(sorry for being a bit off-topic here)]]> http://forum.infiniteautomation.com/forum/posts/preList/311/1537.page http://forum.infiniteautomation.com/forum/posts/preList/311/1537.page GMT http://forum.infiniteautomation.com/forum/posts/preList/311/1539.page http://forum.infiniteautomation.com/forum/posts/preList/311/1539.page GMT



]]> http://forum.infiniteautomation.com/forum/posts/preList/311/1540.page http://forum.infiniteautomation.com/forum/posts/preList/311/1540.page GMT I also made the whole thing into a separated Arduino library (which was something that needed to be done anyway).

I also added code to make it easy to check which registers were changed by the master.

I'll ask jpmzometa if he wants to include the changes.

(Again, sorry for being off topic here)
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I transfer write registers to separate variables. If I need feeback of a write I use seperate read registers. That way I know my embedded code is performing correctly.

I will be hacking a broadcast as well for my nightly time syncs. Slave ID of 0 is not allowed from the ui. I will pick one arduino to respond to an address 1 request while the others are passive and used that as my broadcast address. ]]> http://forum.infiniteautomation.com/forum/posts/preList/311/1581.page http://forum.infiniteautomation.com/forum/posts/preList/311/1581.page GMT
How can I send time and date to all arduino slaves with mango and modbus rtu?

Is it possible?

Thanks]]> http://forum.infiniteautomation.com/forum/posts/preList/311/3692.page http://forum.infiniteautomation.com/forum/posts/preList/311/3692.page GMT
I would change the code to handle a "broadcast" address and have only one device respond to a request to the master and the others are passive listeners. That way only one entry is required on the Mango side along with a CRON event to trigger write the timestamp.

Otherwise you could probably use Mango events to fire off to write the date/time as a unix epoch timestamp or what ever format you want to send to registers in Modbus and manually configure a date/time point for each device. That would emulate a broadcast.

Not sure if that helps.]]> http://forum.infiniteautomation.com/forum/posts/preList/311/3704.page http://forum.infiniteautomation.com/forum/posts/preList/311/3704.page GMT http://sites.google.com/site/jpmzometa/arduino-mbrt/arduino-modbus-slave
It doesn't implement broadcast messages. I was talking with the writer but he is busy to add that feature.

He says that there is no reply from slaves for a broadcast message.

It's very interesting to add broadcasting to the library but my C++ knowledge isn't good enough.

]]> http://forum.infiniteautomation.com/forum/posts/preList/311/3705.page http://forum.infiniteautomation.com/forum/posts/preList/311/3705.page GMT That is the one I used and modified on my own for my own consumption last year. Even if you add a broadcast in the arduino code, the UI on the Mango side won't let you add a broadcast address of 0. So elegant changes or a hacks needs to be made, hence my suggestions.
]]> http://forum.infiniteautomation.com/forum/posts/preList/311/3706.page http://forum.infiniteautomation.com/forum/posts/preList/311/3706.page GMT If you send the changes he will add them in the web page.

About Mango modifications... Is there any answer from Serotonin? ]]> http://forum.infiniteautomation.com/forum/posts/preList/311/3707.page http://forum.infiniteautomation.com/forum/posts/preList/311/3707.page GMT
Modbus4J works with broadcast, Mango not. Am I right?]]> http://forum.infiniteautomation.com/forum/posts/preList/311/3708.page http://forum.infiniteautomation.com/forum/posts/preList/311/3708.page GMT








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