Every few weeks, I notice that the Bluetooth connection on my EP600 has dropped, and I can’t connect my Smartphone via Bluetooth.
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So far, the only workaround I’ve found is to completely shut down the EP600; after restarting, the Bluetooth connection was stable again, at least for a few weeks.
It should be possible to restart just the IoT Box and not the EP600. Unfortunately, the app doesn’t offer a button for that.
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The IoT box itself is connected to the EP600 via a 4-pin cable; presumably, two wires are for power and the other two are for communication—at least that seems logical to me:
Has anyone tried this before, or does anyone have a pinout diagram for the IoT Box that I can use to identify the wires?
My idea would be to simply use a relay to briefly cut off power to the IoT Box, which should then cause Bluetooth (and Wi-Fi) to restart. I could control the relay via the remote maintenance feature of my control system…
Thx @ndwr
I just ran an initial test by disconnecting the red wire.
It works as expected: the IoT box turns off, and after reconnecting the red wire, the IoT box turns back on and reconnects to Wi-Fi and Bluetooth. ;-)
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I’ll then replace the terminal block with one of those fancy T-cable connectors and connect it to the control cable. Then I can use the relay to turn the IoT box on and off remotely as I please.
That’s great, good job and thanks for reporting back.
When you are around and want to do it manually, instead of disconnecting the wire by the WAGO, you can momentary press the RST button on the PBOX to hot-restart the internal ESP32.
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For what regards the wire coloring, to keep in mind:
RED: shared negative between CAN and power (yes it’s RED and not a positive), you disconnect this to cut the negative of both the power line and the CAN bus line, which is the correct way to restart the unit (and also safest if you accidentally short it to ground)
YELLOW: positive 12 VDC
BLACK: CAN H
WHITE: CAN L
The WAGO is really just for testing; that’s where the T-connector will go, and a relay will handle the disconnection in the future.
Unfortunately, pressing the RST button on the PBOX doesn’t work when I’m away on vacation for a few days, and that’s exactly when my smart home Bluetooth connection usually crashes…
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And thanks for clarifying the wire colors and pin assignments. That sounds very much like internal information that BLUETTI is very reluctant to share.
