Not sure if you have a special case and this is in purpose, but right now you have two MQTT brokers configured, which will be rather challenging to configure.
Remember, the basic information flow is device ↔ MQTT broker ↔ OH2
In the best case you have now:
device1 ↔ MQTT embedded ↔ OH2
device2 ↔ MQTT Mosquitto <-------^
While OH2 can likely handle two brokers, it will be challenging to remember who does what (unless you have a special case and this is on purpose). OH2 provides an embedded broker for convenience and hence, maybe you want to delete the Mosquitto broker you had set up (or vice versa if this is your preference).
A few more things to remember:
- 127.0.0.1 always points to the local machine (whichever that is); if you are unsure, just use the real IP address in all cases.
- Clear the Cache can be your friend if you work on configs a lot and get weird results
- in any case, do it step-wise: first check if you device connects to the broker, than check if OH2 connects to the broker; and if both, check then you get to content and items, etc. You can use a separate program to connect to your broker with your computer and see what is happening: MQTT Exploration App (as well as read incoming commands or post MQTT messages)