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I'll have a look at that (I2S) later. But I don't think there's a problem with it.

For the RST pin, the WT32i datasheet suggests a diode rather than a straight wire. This implies that the pin might also be an output from WT32i in addition to being an input.

I'll investigate that later too, but for now best to leave the RST disconnected until I've had another look on the weekend. Or if you have a general purpose small signal diode, use it. The WT32i datasheet has a diagram somewhere with the polarity.
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