i need to collect sensor data and stream  wirelessly  to Raspberry PI, No internet ( wifi network) is available at the sensor location. i wrote  websocket server and client using esp8266, and it works OK.
i want to replace my esp8266 client with raspberry pi.
Appreciate your guidance/support to write   a websocket client with Raspberry PI and connect to esp8266 server to collect sensor data.
 
Thanks in advance.