Release 1.1.11

Cumulative update verified in Arduino 1.8.13 / ESP8266 Community 2.7.4 / ESP32 1.0.4 / Arduino SAMD 1.8.3.

Features

• Adds support for advanced MQTT callback implementation that includes C-native primitives
• Switch ESP8266 to DER certificates
• Use Google NTP servers
• Support binary private key

Fixes

• Improves ESP8266 connection code and fault tolerance
• Logs correct host
• Improved Base64 implementation

Thank you @amarkevich, @galz10, and @alvarowolfx for your contributions to the library!

v1.1.10

Release 1.1.10

Cumulative update verified in Arduino 1.8.10 / ESP8266 Community 2.7.1 / esp32 1.0.4 / SAMD 1.8.4.

• Adds non-blocking (asynchronous) connect

To use this, replace calls to mqttConnect with mqttConnectAsync. Thank you @kevinlutzer, @nuclearcat, and @ahmadSum1 for code, review, and bug fixes!

• Adds BLE Gateway example.

See examples > complex > esp32 > Gateway - thank you @galz10 for your contribution!

v1.1.9

This release:

• Updates the ESP8266 example to be more stable
• Adds pre-emptive JWT refresh to avoid errors in stackdriver logging
• Corrects the return type for sending telemetry (thanks @ahmadSum1 for this!)
• Enhances error logging, especially with SSL issues

v1.1.8

A few small bug fixes for this release.

• Pass forward skip option to control skipping network-level reconnect
• Fix link to roots.pem

Moving forward, new (complex) demos will be added in extra. This release adds a camera demo for ESP32.

v1.1.7

• Updates to use LTS certs and support newer versions of the ESP8266 SDK
• Minor doc updates
• Progress towards LTS support from ESP32

v1.1.6

• Updates internal MQTT device to use non-lvalue pointers
• Adds documentation for pulling from PubSub subscription

v1.1.5

This release adds wrappers for sending binary payloads to the MQTT bridge.

v1.1.4

This release adds the first unified sample that will work across all of the supported chip types.

v1.1.3

This release refactors the initial parts of the MQTT code into an external class, CloudIoTCoreMqtt:

class CloudIoTCoreMqtt {
  // ...
    MQTTClient *mqttClient;
    Client *netClient;
    CloudIoTCoreDevice *device;

  public:
    CloudIoTCoreMqtt(MQTTClient *&mqttClient, Client *&netClient, CloudIoTCoreDevice *&device);

    void startMQTT();
    void publishTelemetry(String data);
    void publishTelemetry(String subtopic, String data);
    void publishState(String data);
    void onConnect();
    void setLogConnect(boolean enabled);
    void logError();
    void logReturnCode();
    void mqttConnect();

As a result, this refactor greatly reduces the amount of code that is copied between device examples and is progress towards having an example that works on multiple devices.

The caller is required for allocating the objects used with the wrapper to simplify the object management and allow the caller to manage / control what has context.

There are still some device-specific parts like connectivity / JWT generation that are defined globally within the examples.

Additional changes include:

• Minor documentation updates
• Enhanced reconnect logic
• Subtopic support for sending telemetry, ex:

mqttDevice->publishTelemetry("/subfolder", "data")

In future releases, we'll be looking to further unify the examples and further reduce the code made visible to the developer. For now, some of this is left visible in the example code to be tweaked.

v1.1.2

A few small updates worth publishing:

• Updates QoS to correct settings for Commands / Configuration
• Moves NTP configuration to header
• Adds back reference in ESP32 for small fix for WiFi sleep
• Adds explicit heartbeat configuration