Works on 5/7 units?

[brienwheeler]

I have the weirdest issue. I’ve got 7 Mitsubishi AC units - 4 MSZ-FH09A, 1 MSZ-FH12A, 1 MSZ-FH15A, and 1 MSZ-FH18A. I’m using the Wemos D1 mini and following Chris Davis’ instructions using HomeAssistant and the Mosquitto add-on. As the title says, 5 of the units work perfectly, but the other 2 do not. It’s the FH15A and the FH18A that aren’t working. I can initialize the configuration but then when the chip is connected to the AC, the status page will say the chip is connected to the unit but not MQTT broker. If I disconnect the chip and power it via USB, it connects reliably to the broker (but then of course is not connected to the AC). Also when connected to the AC unit, HTTP access hangs and is very slow, so maybe a huge amount of packet loss? Could it be a power issue with the units in some way? Those units are actually the two that are closest to our WiFi router, so it’s probably not signal strength. Any ideas for how to debug or what I can change? Thanks in advance.

[dzungpv]

Some indoor unit they may remove some resistor, take your board photo I will help you find it

[brienwheeler]

Thank you very much, but I figured it out. Turns out it wasn’t an issue with my Arduino boards or mitsubishi2MQTT. Rather, I had my Raspberry Pi Home Assistant on WiFi. When I moved my Pi to hard wired, everything started working fine.