Your washing machine could be sending 3.7 GB of data a day — LG washing machine owner disconnected his device from Wi-Fi after noticing excessive outgoing daily data traffic
The issue with web IpT is that devices send data reports of their status every fraction of a second. The packet may just be a few bytes but over time it adds up. Instead I wished they could just send status when they change state and wait for a confirmation but that’s harder to code…