No response from MQTT Binding readProperty method

[hidetak]

I apologize for the inconvenience, but I need your confirmation on the following issues.

Problem

There is no response when I call readProperty on MQTT Binding.
A sample program is placed below.
https://github.com/hidetak/test-node-wot/tree/main/no-response-mqtt-read-property

Also, if observeProperty is executed and then writeProperty is executed, the written value can be retrieved, but sometimes it is retrieved twice.

environment

• Mac(Apple siicon)
• OS: Sonoma 14.1
• nodejs: v18 or v20
• node-wot: 0.8.12

Steps to reproduce

get the following code

https://github.com/hidetak/test-node-wot/tree/main/no-response-mqtt-read-property

1. $ npm install
2. $ npm run start:server
3. open new terminal
4. $ npm run start:client

When executed, the following string is output.

write property 100
observed count value is:  100

Expectations are as follows.

count value is: 0
write property 100
observed count value is:  100

Sometimes observed count value is: 100 is output twice

write property 100
observed count value is:  100
observed count value is:  100

I apologize if there is a problem with my usage.

[danielpeintner]

@egekorkan can you take a look?