Closed AdamMiltonBarker closed 8 years ago
Hi @AdamMiltonBarker
this library depends on you providing a network client library for establishing the underlying TCP connection. It's at that layer that any SSL connection is negotiated - not in this library. So it isn't a question of whether this library is able to do it or not - it's all about the network library.
I have heard some have successfully used https://www.arduino.cc/en/Reference/WiFi101SSLClient to create secure connections, but I don't know if it was to Azure IoT Hub specifically.
Hi thanks I am using this I just couldn't find the library again, but fails at each attempt. https://github.com/arduino/cloud-examples/blob/master/mqtt/mqtt_send_digital/mqtt_send_digital.ino
I have added an issue on their repo, I will let you know if it gets resolved in case anyone else has an issue in the future.
Still no reply yet from about the other library, will close this issue down and just update it when I work it out in case anyone comes over it in the future.
I've posted some updates on this here: https://github.com/arduino/cloud-examples/issues/3#issuecomment-209627682.
Just incase anyone runs into this:
1) the root cert for the Azure IoT Hub domain needs to be flashed on your board. See the WiFi101-FirmwareUpdater read me for how to do so.
2) Since the credentials for the Azure broker are super long (password alone is 138 bytes). The buffer size (MQTT_MAX_PACKET_SIZE) in this library needs to be increased, the default size 128 bytes. I successfully connected after using a buffer size of 1280 bytes (this could be lowered with some experimentation). Since I was using a SAMD based board which has 32kB of RAM, a bigger buffer is not an issue. For AVR this would not be feasible.
Hi has anyone been successful in connecting using SSL to any broker? I have issues with my own broker, Arduino and Azure IoT Hub. If it isn't possible with PubSubClient anyone know a library that can.
Thanks in advance.