Hi all,
I do apologise for addressing you in English, but I am afraid my German is not good enough to properly convey my query. I will be able to read and understand answers in German, though
I have a 3 x 25 amps grid hookup.
I have two SmartEVSE modules, one uses L1 + L2 (for a Tesla), the other uses L3 (for an Ampera E).
I have a sensor box so I can use the modules in smart mode.
See my problem? When L3 is heavily loaded, it will impact both modules, not just the one that uses L3.
Rather than going for two sensor boxes, I have put my modules in Slave mode and I use a RPI Zero W as Master.
The PI receives current info from the sensor box for all three phases and controls the slaves. The PI responds to requests from the Slaves and it sends regular current broadcast messages.
So far so good. Except that every now and then (this can be after 5 minutes or several hours) both Slaves switch from Charging mode to Ready Mode for no apparent reason. As if the have not received the broadcast messages for too long.
I have already noticed that the slaves have issues with the broadcast message if the broadcasted current is 7 (0x07) or 11 (0x0B). I have escaped these bytes (the same way other special bytes are escaped) but that has not helped.
So now, whenever the calculated current for a slave is 7 or 11, I change it to 6 or 10 before sending the broadcast message. Now the problem occurs far less frequent. But it still does. and I don't know why.
Anybody here recognises any of this?
BTW: Going for a second sensor box would probably be much easier, but ultimately I want to be able to 'disconnect' L3 from the second module and 'connect' it to the first module when the second module is not in use: When the Ampera E is charging the Tesla will charge on 2 phases. When the Ampera E is not charging, the Tesla can charge on three phases. That line of thinking.
Vielen dank im voraus,
Anko