Temperature and Humidity Sensor to HTML using JavaScript gauges

1. Description

This is a slightly variation of the setup in the previous post (Sensor Reading Part 2: Temperature and Humidity Sensor to HTML). Readings from a DHT11 temperature and humidity sensor are periodically sent to the client’s browser and displayed using JavaScript gauges. The webpage is hosted on a SD card, data refresh in the client browser is performed through AJAX and XML.

Difficulty level: intermediate.

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