Here's a very nice book about the ESP8266 wifi chip: http://neilkolban.com/tech/wp-content/uploads/2015/08/The-ESP8266-Book-Augu= st-2015.pdf Bob --=20 http://www.fastmail.com - Choose from over 50 domains or use your own --=20 http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .