Wireshark logs

Relay Box MAC 02:81:CB:E4:F8:52 asks B3 for data

213.108.112.148 192.168.61.156 80 HTTP 211 GET /api/relaybox/0281CBE4F852 HTTP/1.1 

Answer from B3 when the Relay Box address is known

192.168.61.156 213.108.112.148 56582 HTTP 330 HTTP/1.1 200 OK (text/html) 

Example of data field in B3 answer when there are no active alarms assigned to a given CG1018 (000)

Line-based text data: text/html (3 lines)
    [FlashLight]\r\n
    000\r\n
    [End]