Cannot subscribe with MQTT QoS 1

Hey @Jose_Cruz,

QoS 1 is supported for publishing to Losant’s broker. This results in every message being PUBACK’d by the broker to verify delivery.

QoS 1 is technically allowed for subscriptions, but Losant’s broker does not support cleansession=0, which means unacknowledged publishes to client subscription will not be retried.

You can find a few more details and the reason these are not currently supported in the following thread: