IOT – Google, Amazon Alexa, Signal Jammer, ESP 8266 NodeMCU and Location Tracker etc..,: New model technology development - Kindle edition by k, Anbazhagan, k, Ambika parameswari. Children Kindle eBooks @ Amazon.com.
Smart Home with Google Assistant & Alexa using NodeMCU ESP8266 - IotCircuitHub
ESP8266 Arduino Tutorial: Hacking an Alexa | Toptal
Alexa Home Automation using ESP8266 - IotCircuitHub