including a full datasheet and an AT command set. All the documentation is in Chinese. There’s also an “ESP8266 IoT SDK”, but from a quick glance at the code, this appears to be an SDK for ...

Espressif Systems has been doing a good job with their ESP8266 product (of course ... I2S should be workable with only a little bit of datasheet-poking and head-scratching. Of course, you could ...