Create Chart

Generate chart with HTTP GET

Request

HTTP Method

GET

URL

https://api.thingspeak.com/channels/<channel_id>/charts/<field_id>

URL Parameters

Name	Description
<channel_id>	(Required) Channel ID for the channel of interest.
<field_id>	(Required) Field ID for the field of interest.

Example: https://api.thingspeak.com/channels/99990/charts/2

Chart Query String Parameters

Use these parameters to adjust the chart properties. Use ? to append the first parameter, and & for subsequent parameters.

Name	Description	Value Type
title	(Optional) Chart title. The default is the channel name.	string
xaxis	(Optional) Chart x-axis label. The default is "Date".	string
yaxis	(Optional) Chart y-axis label. The default is the field name.	string
color	(Optional) Hex Value for line color. The default is FF000 (red).	string
bgcolor	(Optional) Background color. The default is white.	string
type	(Optional) Type of chart. The default is line.	line, bar, column, spline
width	(Optional) Chart width in pixels, iframe width is 20 px larger, default chart width: 400. Set to auto to automatically adjust chart size based on its parent container.	integer
height	(Optional) Chart height in pixels, iframe height is 20 px larger, default chart height: 200. Set to auto to automatically adjust chart size based on its parent container.	integer
dynamic	(Optional) Make chart update automatically based on the time interval mentioned in update. The default is false.	true or false
step	(Optional) Draw chart as a step chart. The default is false.	true or false
yaxismin	(Optional) Minimum value of chart Y-Axis. If blank, the value is auto-calculated.	decimal
yaxismax	(Optional) Maximum value of chart Y-Axis. If blank, the value is auto-calculated.	decimal
update	(Optional) Time interval in seconds to update the chart automatically. The default is 15.	integer

Feed Query String Parameters

Use these parameters to adjust the properties of the channel data used to generate the chart. If there are no previous parameters, use ? to append the first parameter, and & for subsequent parameters. Otherwise append all parameters with &.

Name	Description	Value Type
api_key	(Required for private channels) Specify Read API Key for this specific channel. The Read API Key is available on the API Keys tab of the channel view.	string
results	(Optional) Number of entries to retrieve. The maximum number is 8000. The default is 100.	integer
days	(Optional) Number of 24-hour periods before now to include in feed.	integer
start	(Optional) Start date in format YYYY-MM-DD%20HH:NN:SS.	datetime
end	(Optional) End date in format YYYY-MM-DD%20HH:NN:SS.	datetime
offset	(Optional) Timezone offset used to display results. Use the timezone parameter for greater accuracy.	integer
min	(Optional) Minimum value to include in response.	decimal
max	(Optional) Maximum value to include in response.	decimal
round	(Optional) Round to this many decimal places.	integer
timescale	(Optional). Get first value in this many minutes. The valid values are: 10, 15, 20, 30, 60, 240, 720, 1440, "daily".	integer or string
sum	(Optional). Get sum of this many minutes. The valid values are: 10, 15, 20, 30, 60, 240, 720, 1440, "daily".	integer or string
average	(Optional) Get average of this many minutes. The valid values are 10, 15, 20, 30, 60, 240, 720, 1440, "daily". Note: NaN values are interpreted as 0 when calculating the average.	integer or string
median	(Optional) Get median of this many minutes. The valid values are: 10, 15, 20, 30, 60, 240, 720, 1440, "daily"	integer or string

Response

Success

HTTP Status Code

200 OK

Body

The response is a ThingSpeak chart.

Error

For the full list, see Error Codes.

Examples

You can use your web browser to complete GET HTTP requests to the ThingSpeak™ RESTful API. To see the format for an HTTP response, click the link or copy it to your browser.

Modify Chart Display Parameters

You can modify the chart display properties using parameters set in the API request. Use title to add a custom title, color to change the line color, and width to specify a custom width for the plot in pixels. Create a chart using this HTTP GET:

https://api.thingspeak.com/channels/276330/charts/7?title=Soil%20Moisture&color=FF69B4&width=850&xaxis=Time

The response is a chart that displays the soil moisture measurement with a pink line and a custom title and a wide view. The data is from a soil moisture monitor posting to ThingSpeak Channel 276330.

Modify Chart Data

You can modify the data used to generate a custom chart. Use the average parameter to average over a set number of minutes, days to select a number of days worth of data, up to 8000 points, and min to show data larger than a given minimum value. Create a chart using this HTTP GET:

https://api.thingspeak.com/channels/276330/charts/1?average=240&days=7&min=200

The response is a chart that displays the average soil moisture values over a 240-minute window for four days, excluding any points with a value lower than 200. The data is from a soil moisture monitor posting to ThingSpeak Channel 276330. The example here will differ from what you see since the data is dynamic.

Create Chart with Chart and Feed parameters

You can use both chart and feed parameters to create a chart with the desired properties. Use title, xaxis, color, type, width, height, average, yaxismax, and dynamic to create a custom chart. Create a chart using this HTTP GET:

https://api.thingspeak.com/channels/38629/charts/2?title=Route%209%20Traffic&xaxis=Time&yaxis=Density%20of%20Eastbound%20Cars&color=0000FF&type=column&average=10&width=500&height=500&yaxismax=10&dynamic=true

The response is a chart that displays the average outside temperature values over a 10-minute window using the temperature data from field 2 of ThingSpeak Channel 9.