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absalom-muc / MHI-AC-Ctrl

Reads and writes data (e.g. power, mode, fan status etc.) from/to a Mitsubishi Heavy Industries (MHI) air conditioner (AC) via SPI controlled by MQTT
MIT License
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Omit level shifter? #94

Closed nmg196 closed 2 years ago

nmg196 commented 2 years ago

Hi Just wondering - as the ESP8266 is 5V tolerant on the data pins, can the level shifter be safely omitted or have people encountered problems? I'm trying to avoid the need for a custom PCB as that makes it dramatically more complex for me.

Thanks! Nick

absalom-muc commented 2 years ago

We had this discussion already here. My recommendation is still using the level shifter as long there is no official statement in the datasheet related to 5V tolerance.

nmg196 commented 2 years ago

Thanks - there is an official statement about it which I have now posted about on the original issue you linked to.

I will close this as a duplicate.