To read and write to a ThingSpeak channel, your application sends requests to the ThingSpeak server by issuing HTTP requests, publishing MQTT messages, or using MATLAB® functions. Each ThingSpeak channel can have up to eight fields of 255 characters of data, in either numeric or alphanumeric format. A channel also has location information and a status update field. Each channel data entry is stored with a date and timestamp. You can retrieve stored data by time or by entry ID.
Use the ThingSpeak API to process numeric data, which includes timescaling, averaging, median, summing, and rounding. You can create and update a ThingSpeak channel by posting a feed with your API key and data using HTTP POST. The channel feeds support JSON, XML, and CSV formats for integration into applications.
ThingSpeak stores data in channels. Learn how to configure a channel to control access and how to sort your channels for faster access.
Learn how to create a channel, collect data, and write it to a new channel.
Learn about display and data control settings for charts on your channel view.
Learn about data control for your channel with API Keys and fixed API addresses for ThingSpeak services.
Import and export CSV data to a ThingSpeak channel.