Technically, ESP8266 refers to a chipset, but typically now refers to the PCB with integrated antenna, etc. There are multiple versions - seemingly incremented

Technically, ESP8266 refers to a chipset, but typically now refers to the PCB with integrated antenna, etc. There are multiple versions - seemingly incremented at random by chinese manufacturers - we're up to the ESP-14 now - http://www.aliexpress.com/wholesale?catId=0&initiative_id=SB_20160328084805&SearchText=esp-14 http://www.aliexpress.com/wholesale?catId=0&initiative_id=SB...