A user identified as Nomad discovered that a Keurig K-Supreme SMART coffee machine caused severe home network congestion. The device generated over 1TB of upload traffic in just 10 days, according to data from a UniFi network management system.
The coffee machine recorded 1008.45GB of upload traffic and 9.94GB of download traffic over a period of 10 days and 9 hours. This resulted in an average daily upload volume of approximately 97GB, with a sustained transfer rate of about 9Mbps.
The device, which uses 2.4GHz Wi-Fi, features remote control capabilities via an app and integration with Amazon Alexa and Google Home. Its BrewID function identifies coffee pods to adjust brewing settings based on manufacturer recommendations.
Nomad suspects the traffic remained within the local network rather than being sent to the internet. He resolved the issue by restarting the coffee machine and isolating it within a separate virtual local area network, or VLAN.
The exact cause of the data spike remains unconfirmed as Keurig has not released technical details regarding the device's firmware or network protocols. Tom's Hardware noted that standard functions like firmware updates or pod identification should not generate such traffic.
