The motors are driven by an ESP32, which uses internet control message protocol (ICMP) to ping a trusted server via WiFi, calculates the proper angles for the hands, and drives the motors to show ...

ICMP ICMP stands for Internet control message protocol. This is not a protocol used to transfer user data but rather to provide a form of internal maintenance messaging service.

Dubbed a BlackNurse attack, the technique leverages a low-volume Internet Control Message Protocol (ICMP) -based attack on vulnerable firewalls made by Cisco, Palo Alto, SonicWall and others ...