The link to aws Iot I used was made with these instructions:
How to Bridge Mosquitto MQTT Broker to AWS IoT | The Internet of Things on AWS – Official Blog (amazon.com)
I made these modifications to the ‘bridge.toml’ file recommended in the above document in mosquitto/conf.d so that all the topics passing through the bridge were available to aws, and used mqtt protocol version 5.0 as that is what AWS expects:
Specifying which topics are bridged and in what fashion
topic # out 1
topic # in 1
Setting protocol version explicitly
bridge_protocol_version mqttv50
bridge_insecure false
With these changes, I can now see all traffic.
Peter