firstly thanks to vmarandola , he have writen the arduino code for KinCony’s voice module (based on ESP8266 wifi module).
here is his github link for source code: https://github.com/vmarandola/KinconyAlexaGoogle
if you have voice module, you can DIY by this code, it support by Google home and Alexa speaker for voice control. Also have scene mode and timer function.
When updated this firmware, not need to use USB-RS232 cable to set google home or alexa settings. just set by webpage,because ESP8266 will work as “AP” hotspot mode.
here is some photos, if you have any questions, you can leave message on our forum or vmarandola’s github.