Programming language: Go
License: MIT License
Latest version: v1.0

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A simple framework for implementing a Google IoT device.

This package makes use of the context package to handle request cancelation, timeouts, and deadlines.

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Copyright 2018, Andrew C. Young <[email protected]>

License: [MIT]

Here is an example showing how to use this library:

package main

import (
    // Your client must include the paho package
    // to use the default Eclipse Paho MQTT client.
    _ "github.com/vaelen/iot/paho"

func main() {
    ctx := context.Background()

    id := &iot.ID{
        DeviceID:  "deviceName",
        Registry:  "my-registry",
        Location:  "asia-east1",
        ProjectID: "my-project",

    credentials, err := iot.LoadRSACredentials("rsa_cert.pem", "rsa_private.pem")
    if err != nil {
        panic("Couldn't load credentials")

    options := iot.DefaultOptions(id, credentials)
    options.DebugLogger = log.Println
    options.InfoLogger = log.Println
    options.ErrorLogger = log.Println
    options.ConfigHandler = func(thing iot.Thing, config []byte) {
        // Do something here to process the updated config and create an updated state string
        state := []byte("ok")
        thing.PublishState(ctx, state)

    thing := iot.New(options)

    err = thing.Connect(ctx, "ssl://mqtt.googleapis.com:443")
    if err != nil {
        panic("Couldn't connect to server")
    defer thing.Disconnect(ctx)

    // This publishes to /events
    thing.PublishEvent(ctx, []byte("Top level telemetry event"))
    // This publishes to /events/a
    thing.PublishEvent(ctx, []byte("Sub folder telemetry event"), "a")
    // This publishes to /events/a/b
    thing.PublishEvent(ctx, []byte("Sub folder telemetry event"), "a", "b")

Thanks to Infostellar for supporting my development of this project.

*Note that all licence references and agreements mentioned in the iot README section above are relevant to that project's source code only.