Comments (8)
I'm unaware of any particular issues between one device or the other.
All I can guess is that one of them has a stronger pull-up resistor on the input lines.
Are you using a TTL level shifter to go from 3.3v on the microcontroller to 5V that the Mitsubishi uses? Or, are you using the voltage divider circuit that the upstream HeatPump library author recommends?
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@geoffdavis I'm just connecting directly from the CN105 to the D1. Which is working for the other 3 units.
As I read through old issues it just seems like there are problems with some D1 Minis.
I have a couple more arriving today that I'm going to try, I'll report back. You can close this issue.
Thanks!
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I would try the voltage divider circuit before throwing out those D1 minis. The ESP8266 really wants 3.3v and you can cook their serial pins if you give it the 5v from the Mitsubishi on those digital pins.
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@davidmerrique you can try resetting your D1s once or twice (see #49)
Though my setup has some resistors there I think (as Geoff suggests).
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I have had a d1 mini in my air con for years now, But I'm just using a TTL level shifter. Only just recently switched firmware to esphome and has been flawless over these years.
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I didn't realize a proper MOSFET level shifter was an option, and I need to add some level shifting. Any chance you could point to some that are known to work @geoffdavis ?
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