ThingSpeak Write

Publish data to Internet of Things using ThingSpeak

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Libraries:
Simulink Support Package for Android Devices / Communication

Description

The ThingSpeak Write block publishes data from target hardware to the Internet of Things (IoT) using ThingSpeak™.

ThingSpeak is an open IoT platform with MATLAB^® analytics that allows you to collect and store sensor data in the cloud and develop IoT applications. The ThingSpeak IoT platform provides applications that allow you to analyze and visualize your data in MATLAB and then act on the data. For more information on how to use ThingSpeak, see ThingSpeak Apps, Plugins, and Tutorials.

Ports

Input

fieldn — Data published to nth variable of ThingSpeak channel

[1 x N] vector, where N ranges from 1 to 8

The block publishes the data read from this port to the nth variable on the ThingSpeak channel at each time step. The number of data channels at the block input depends on the number of variables you select in the Number of fields parameter. For example, if you set the Number of fields parameter to 3, the block enables three input ports with names field1, field2, and field3.

Data Types: single

location — Send location data

three-element numeric vector

Specify location data as a three-element numeric vector of the form [latitude, longitude, altitude]. The block then publishes the location data to ThingSpeak.

Dependencies

To enable this port, on the Optional tab, select Send location information and set the Location source parameter to Input port.

Data Types: single | double

Parameters

Main

Channel ID — ThingSpeak channel ID

12397 (default) | positive integer

Enter the unique identification number of the ThingSpeak channel from which the block publishes data.

Follow these steps to get the ThingSpeak channel identification number.

1. Sign in to ThingSpeak using your MATLAB account.

2. Select Channels > My Channels.

3. Select the channel to get the write API key.

4. Click the Channel Settings tab and copy the channel ID from the Channel ID parameter.

5. Open the ThingSpeak Write block in your model and paste the copied ID to the Channel ID parameter.

Write API key — Write API key of ThingSpeak channel

character vector

Enter the 16-digit write API key of the ThingSpeak channel.

Follow these steps to get the API key for your ThingSpeak channel:

1. Sign in to ThingSpeak using your MATLAB account.

2. Select Channels > My Channels.

3. Select the channel to get the ThingSpeak write API key.

4. Click the API Keys tab and copy the key from the Write API Keys parameter.

5. Open the ThingSpeak Write block in your model and paste the copied API key in the Write API key parameter.

Number of fields — Number of ThingSpeak fields to publish data

1 (default) | 2 | 3 | 4 | 5 | 6 | 7 | 8

Select the field(s) of the ThingSpeak channel to which the block writes the data. For example, if you set this parameter to 3, the block has three input ports field1, field2, and field3. If you set this parameter to 1, the block has only one input port field1.

Update interval (seconds) — Data update interval

60 (default) | nonnegative scalar

Specify the time interval at which the input data is updated on the ThingSpeak channel.

Optional

Send location information — Send location information

off (default) | on

Select this parameter to send the location information to the ThingSpeak channel.

Location source — Source of location data

Block dialog (default) | Input port

Select the source of the location data as one of the following:

• Block dialog — Specify the location using the Location (latitude, longitude, altitude) parameter.

• Input port — Specify the location using the location input port.

Use decimal degrees notation to specify latitude and longitude and use meters to specify altitude. For example:

• The lowest human-sized point underground, the TauTona Mine in Carletonville, South Africa, is [-26.416111,27.4275,-3900].

• The highest point measured from sea level, the summit of Mount Everest in Nepal, is [27.988056,86.925278,8848].

Location (latitude, longitude, altitude) — Location information

[42.29971, -71.350719, 69.29] (default) | three-element numeric vector

Enter the location information as a three-element numeric vector of the form [latitude, longitude, altitude] to publish location information to the ThingSpeak channel.

Dependencies

To enable this parameter, set Location source to Block dialog.

Version History

Introduced in R2016b