WiFi Module ESP8266 AT-Command Testทดสอบการใช้งาน ESP 8266 wifi module ด้วย AT-CommandESP8266 is Serial Port WiFi Module. It is very low cost.Then we can use for many Application for Home Automation or IOT.How to TestYou should use AT-Command to Test Module First.So,you will know how to use At-Command and step to use ( set mode ,connect wifi, make server )Hardware for testYou must have USB to RS-232 Converter ( I've one but I can't found it )So,I decide to use Arduino board as USB to RS-232 [...]