Control Maplin Remote Socket Using Alexa
These are very cheap from Ebay (~£2-3) and can be plugged into your computer using the micro usb connector for programming and powering the device.
They can be programmed using the normal Arduino IDE
These are also very cheap and can be purchase for £1-2 for a transmitter receiver pair
Available from Maplin in the UK, pair available order code N78KA - £9.99
Tested on Arduino 1.8.5 IDE
Download ESPAsyncTCP from https://github.com/me-no-dev/ESPAsyncTCP
Sketch -> Include Library -> Add Zip library
Download fauxmo library from https://bitbucket.org/bibbbi/fauxmoesp/get/5bcd3b483a69.zip
Sketch -> Include Library -> Add Zip library
In tools lwip-variant, choose v1.4 Prebuilt
The socket I used has two small rotary switches. In the code example given, the top dial is set to I and the bottom one to 2. See https://github.com/sui77/rc-switch/wiki/HowTo_OperateLowCostOutlets for more details.