Write Data to Channel

Use the REST and MQTT APIs to update channels with software or devices

ThingSpeak™ is an IoT platform that uses channels to store data sent from apps or devices. You can write data to your ThingSpeak channels in several ways: HTTP calls from the REST API, MQTT Publish method, and the thingSpeakWrite function from MATLAB. Learn more about how to Choose Between REST API and MQTT API to update a channel.

REST API

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Write Data

`Write Data`	Update channel data with HTTP GET or POST
`Bulk Write JSON Data`	Write many entries to channel in JSON format with single HTTP POST
`Bulk Write CSV Data`	Write many entries to channel in CSV format with single HTTP POST
`Write Image`	Write channel image with HTTP POST

MQTT API

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Publish Data

`Publish to a Channel Feed`	Publish message to update multiple channel fields simultaneously with MQTT
`Publish to a Channel Field Feed`	Publish message to update single channel field with MQTT

Functions

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Write Data with MATLAB

thingSpeakWrite Write data to ThingSpeak channel

Topics

Choose How to Write Data

Ways to Write Data
Collect data in your channel with hardware or software on devices or computers using the REST API, MQTT, MATLAB^®, or third party-applications.
Choose Between REST API and MQTT API
Learn when to use REST and MQTT to update a channel.

Write Data With Libelium Hardware

Write Data with Libelium Meshlium System
Use the ThingSpeak Cloud Connector with Libelium Meshlium hardware to easily store and analyze your data.

Write Distributed Sensor Data from The Things Network

Write Data from The Things Network
Use a ThingSpeak integration with The Things Network to write data from devices connected on a LoRa^®network.
Collect Agricultural Data over The Things Network
This example shows how to set up data collection from three sensors connected to a microprocessor board with a LoRa® radio.

Write Data With Arduino and Particle Photon

Prototyping with Sonar Proximity Sensor
This example shows how to prototype with ThingSpeak™ using a Wi-Fi connected Arduino® board.
Bulk-Update Using an Arduino or an ESP8266
This example shows how to use either an Arduino® MKR1000 board or an ESP8266 board connected to a Wi-Fi® network to continuously collect Wi-Fi signal strength and bulk-update a ThingSpeak™ channel.
Bulk-Update a ThingSpeak Channel Using a Particle Photon Board
This example shows how to use a Particle Photon board connected to a Wi-Fi® network to bulk-update a ThingSpeak™ channel.
Publish to a ThingSpeak Channel Using a Particle Device Client via MQTT
This example shows how to publish measured values to a ThingSpeak channel via MQTT using a Particle device such as a Boron, Argon, Photon, or Electron.

Write Data With ESP8266

Moisture Sensor using HTTP POST Requests to Channel
This example shows how to post multiple fields of data to a ThingSpeak™ channel from a device that wakes from deep sleep.
Post Temperature Data and Read from Channel
This example shows how to collect environmental data from a device and post it from your device to a ThingSpeak™ channel.
Publish and Subscribe to a ThingSpeak Channel Using Secure MQTT
This example shows how to use an ESP8266 board to record RSSI data in ThingSpeak™ via secure MQTT.
Remote Sensor Control Using Secure MQTT Publish and Subscribe
This example shows how to use the MQTT publish and subscribe architecture in ThingSpeak.

Write Data With ESP32

Wireless Network Signal Strength with ESP32 with Arduino IDE
This example shows how to use the wireless network functionality of ESP32 to post data to ThingSpeak™.

Write Data With Raspberry Pi

Bulk-Update Using a Raspberry Pi Board
This example shows how to collect data using a Wi-Fi-connected Raspberry Pi board running Python 2.7.
Publish Using WebSockets in Python on a Raspberry Pi
This example shows how to use WebSockets on port 80 to publish to a ThingSpeak channel using a Raspberry Pi board that runs Python.

Related Information

Troubleshooting

Error Codes

See the details of ThingSpeak REST API error messages and corresponding HTTP status codes.

Troubleshoot MQTT Publish

Get help to resolve common mistakes when using MQTT publish.

Featured Examples

Prototyping with Sonar Proximity Sensor

Prototype with ThingSpeak™ using a Wi-Fi connected Arduino® board. You read and write channel data with the ThingSpeak Communication Library. In this example, an adjustable threshold is read from ThingSpeak to create a proximity detector. The hardware consists of an Arduino MKR100 with a sonar sensor and an indicating LED to show when an object is present.

Open Live Script

Use Google Assistant to Turn a Light On and Off

Use your voice to set a channel value on ThingSpeak™. IFTTT interfaces directly with Google® Assistant to understand your speech and then write to a ThingSpeak channel.

Open Live Script

Moisture Sensor using HTTP POST Requests to Channel

Post multiple fields of data to a ThingSpeak™ channel from a device that wakes from deep sleep. You read a soil moisture sensor and post the value to a ThingSpeak channel. The HTTP POST request is executed by writing to a communication client without a separate library. Directly writing the HTTP request to the wireless network client can offer increased flexibility and speed over the ThingSpeak Communication Library.

Open Live Script

Post Temperature Data and Read from Channel

Collect environmental data from a device and post it from your device to a ThingSpeak™ channel. The example uses an ESP8266 and the ThingSpeak Communication Library to post data and retrieve data from a channel.

Open Live Script

Write Image to ThingSpeak from Raspberry Pi with Python

Write an image to a ThingSpeak image channel from a Raspberry Pi™ board using Python^®.

Open Live Script

Write Image to ThingSpeak from ESP32 Camera Board

Capture an image from an ESP32 camera board and write it to a ThingSpeak image channel.

Open Live Script