I’d like to recap this thread, including the timeline of what happened between April 2023, when I started the thread, and now (March 2024) as I look at all the new things that have been released in that span. This is to make sure I understand where we now sit.
Nov 2022
emonTx v4 (emonTx4) becomes available in the OEM Shop along with emonVS PSU single-phase. The 3-phase version is available as a hidden option in the Shop. There is not yet firmware that supports 3-phase monitoring. emonLib and emonLibCM are available, both of which are designed for one voltage input channel.
AVR-DB: emonTx V4, new hardware in progress - Hardware - OpenEnergyMonitor Community
April 2023
I started this thread and we envisioned two types of North American users of the new emonTx4+emonVS. The non-technical user could use the single-phase emonVS with NEMA 5-15P cable and a single-phase firmware available for emonTx4. The technical user interested in monitoring both legs of their split-phase power did not yet have an option, but they soon would.
May 2023
3-Phase Support came to OEM courtesy of Robert Wall’s emonLibDB.
EmonTx4 3-phase support with emonLibDB - Hardware / emonTx - OpenEnergyMonitor Community
The technical user could now use the 3-phase emonVS (or a 2-phase through special request?) mounted inside their breaker panel and an emonTx4 with 3-phase firmware configured for split-phase US power and the specific circuits monitored.
But this was only the case for a few months, because the emonTx4 was soon supplanted.
Dec 2023
The emonPi2 was released and the emonTx4 was discontinued. The next generation of emonTx will be based on this board but is not yet available per se as I write this.
https://community.openenergymonitor.org/t/emonvs-questions/
Non-technical users would continue to use the single-phase emonVS with NEMA 5-15P cable but would use the emonPi2 with single-phase firmware instead of an emonTx4.
Technical users would continue to use the 3-phase emonVS (or perhaps a 2-phase emonVS through special request) mounted in their breaker panel, and would now use the emonPi2 with 3-phase firmware configured for split-phase US power and the circuits being monitored.
These are high-level outlines, of course. There are various flavors of the plan for each type of user, as we’ve discussed above. My intent is to summarize what devices would be used with what firmware and high-level configuration. Again, my hope is to make sure I understand where we now sit.