06:00

Click a cow. Ring colour: what the Pi-Node thinks it is doing. Teal pulses: a collar packet.

rounding up the herd…

牛cattle · team project

Herd Link

Twenty-four collars send a packet every 10 s (sped up 20×): IMU jerk, gyro variance, neck angle, body and air temperature. Each packet goes through the Pi-Node's real Rust logic, compiled to WebAssembly: behaviour, fever, mastitis, lameness against the herd, bloat, heat stress, and the 5-packet vote that keeps states from flickering. Herd Link was a team build for e-Yantra; this page runs the team's edge-server code.

Cow #01

really doing (simulated)
Pi-Node says

activity jerk

body temp

gyro variance

Make it…

herd avg temp
fever threshold
THI
matches truth

Heat wave (35 °C, humid)

Alerts

The cows and their sensor readings are simulated; every verdict comes from the node's own processor.rs, herd.rs and alerts.rs, unchanged. Thresholds are relative to the herd: the fever line moves up to 40 °C when the whole herd runs warm, and lameness means still while the others are active. That last rule is why you'll see Lameness alerts for cows that are simply lying down while most of the herd grazes: the node trades false alarms for catching an isolated animal early. The collars here send activity on the scale the node's thresholds are written for.