Projects

Staff alert for self-service checkouts

2024–2025

I developed a tool that listens for MQTT messages from self-service checkouts and alerts staff when assistance is needed.

I analysed the MQTT communication between self-service checkouts and mobile terminals, including the messages a checkout sends when it requires staff intervention. Building on that, I developed a Python tool that responds to these events, along with a helper utility for replaying recorded messages during testing.