Postman failing to connect to device in DIY mode

[DeanRos]

Hi

I have setup my minir3 in DIY mode, it is running firmware version 1.4.0.
I am trying to send it a command using postman but get an "Error: socket hang up"
Please take a look at my code below and see if I am doing something incorrect.

POST http://192.168.0.188:8081/zeroconf/signal_strength Error: socket hang up Network Request Headers Content-Type: application/json User-Agent: PostmanRuntime/7.32.2 Accept: */* Cache-Control: no-cache Postman-Token: 7e0530ae-63f2-4e4c-9327-48dcbeb71f14 Host: 192.168.0.188:8081 Accept-Encoding: gzip, deflate, br Connection: keep-alive Request Body { "deviceid": "100174292d", "data": { } }