ESP32 #17: MQTT Secure HTTPS TLS/SSL WebSocket ThingSpeak Publish Example

#ESP32 #MQTT Secure via HTTPS #Websocket Example.
Today: ThingSpeak supports only publishing to channels using MQTT.
C-Source-code for esp-idf command line make or Eclipse (use include.xml).

Source-code
https://github.com/pcbreflux/espressif/tree/master/esp32/app/ESP32_mqtt_secure_publish

MQTT V3.1.1
http://docs.oasis-open.org/mqtt/mqtt/v3.1.1/os/mqtt-v3.1.1-os.html

The WebSocket Protocol
https://tools.ietf.org/html/rfc6455

ThingSpeak MQTT API
https://www.mathworks.com/help/thingspeak/mqtt-api.html

Eclipse Paho MQTT C/C++ client for Embedded platforms
https://github.com/eclipse/paho.mqtt.embedded-c

ESP32 MQTT Eclipse Paho client component
http://esp32.com/viewtopic.php?f=18&t=1012

Kolban’s book on ESP32
https://leanpub.com/kolban-ESP32

Pamgaea Kevin MacLeod (incompetech.com)
https://incompetech.com/wordpress/2013/09/pamgaea/
Licensed under Creative Commons: By Attribution 3.0 License
https://creativecommons.org/licenses/by/3.0/