This project supports emulating upto 14 belkin wemo switches using 1 ESP 8266 chip.
Parts you need:
WeMos D1-mini ($4.00) http://www.aliexpress.com/store/product/D1-mini-Mini-NodeMcu-4M-bytes-Lua-WIFI-Internet-of-Things-development-board-based-ESP8266/1331105_32529101036.html
How to use:
Previous post on single wemo switch https://github.com/kakopappa/arduino-esp8266-alexa-wemo-switch/edit/master/README.md
https://github.com/kakopappa/arduino-esp8266-alexa-wemo-switch/issues/7#issuecomment-355533848
https://github.com/kakopappa/ble-light-bulb