# Get Sensor Value and Send to MQTT **Why is ESP3266?** ESP3266 is a low-cost WIFI microchip with the use of TCP/IP capability. It is produced by Espressif System in Shanghai, China. ![](/files/-MDXkddJP20yg5-oJuRm) For environment development, we will use Arduino IDE which is available on Mac, Windows, and Linux. For this part, we will divide into 2 sections which are "Connect ESP3266 with temperature sensor" and "Connect ESP3266 to MQTT". --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://docs.aic-eec.com/general/hot-cloud/connect-esp3266-to-mqtt.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.