I'll share a comprehensive how-to document with anyone that wants to contact me off-list. There was a heavy dose of AI involved with the Arduino board programming and deciphering the data that came in. The web development aspect can be as simple or complex as you want it to be to display the data. The LilyGO has a display version of the board, but I'm not sure if it has both RS485 and CAN interfaces. But a local display should be easy to add.
David and Tyrone, I'll send the doc along shortly. Jason Szumlanski Florida Solar Design Group On Tue, Sep 8, 2026, 7:59 PM Tyrone Houck <[email protected]> wrote: > Thats awesome! Im planning to use a similar configuration for prototyping > a simple display. Im curious about the server hosting and coding aspect of > the dashboard though. That's a nice touch. Great work > > > > > > > > > On Tue, Sep 8, 2026, 3:52 PM Jason Szumlanski < > [email protected]> wrote: > >> If anyone ever needs tips on how to tap data from the Communication Hub, >> I might be able to help. I developed a custom solution for a client that >> uses an ESP32 board with RS485 and CAN to pull data from two banks of EG4 >> batteries and display the SOC on a web page. >> >> Long story short, I have 23 of the V1 batteries and seven V2 batteries, >> and I'm pulling data for the 23 from the RS485-3 port on the hub and >> data for the 7 from the master battery's CAN port in that comm chain. A >> single LilyGO T-CAN485 does all of the work, uploading it to a server >> where the data is decoded and displayed. This battery bank is open loop >> with a Sol-Ark 15K and four Chargeverters. The client wanted to see the >> battery BMS SOC remotely since the Sol-Ark SOC was wildly inaccurate. >> >> The customer-facing site displays the weighted average of the SOC and voltage >> and the sum of the charge/discharge rate. I also have a more detailed >> Admin site. >> >> Sadly, the Communication Hub doesn't seem to send per-pack data to the >> "inverter," which in this case is my device. I also can't figure out how to >> grab the per-pack data from the v2 CAN bus. Maybe another day... >> >> >> Jason Szumlanski >> Florida Solar Design Group >> _______________________________________________ >> List sponsored by Redwood Alliance >> >> Pay optional member dues here: http://re-wrenches.org >> >> List Address: [email protected] >> >> Change listserver email address & settings: >> http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org >> >> There are two list archives for searching. When one doesn't work, try the >> other: >> https://www.mail-archive.com/[email protected]/ >> http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org >> >> List rules & etiquette: >> http://www.re-wrenches.org/etiquette.htm >> >> Check out or update participant bios: >> http://www.members.re-wrenches.org >> > _______________________________________________ > List sponsored by Redwood Alliance > > Pay optional member dues here: http://re-wrenches.org > > List Address: [email protected] > > Change listserver email address & settings: > http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org > > There are two list archives for searching. When one doesn't work, try the > other: > https://www.mail-archive.com/[email protected]/ > http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org > > List rules & etiquette: > http://www.re-wrenches.org/etiquette.htm > > Check out or update participant bios: > http://www.members.re-wrenches.org >
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