How It Works

From tap to dashboard

One tap on the reader shows up on the teacher's dashboard in about 2 seconds.

%%{init: { "flowchart": { "htmlLabels": false, "diagramPadding": 16 } } }%%
flowchart LR
    T(["Student taps laptop tag"]) --> C["Raspberry Pi
RFID reader"]
    C -- "tap + time" --> F[("Flask API
+ database")]
    D["Live dashboard
OCS Pages"] -- "status every 2s" --> F
    M["Jarvis camera
Mac Mini"] -. "next: face check" .-> F
    classDef next stroke-dasharray: 6 4
    class M next

Architecture: solid lines run today; the dashed camera path is next.

sequenceDiagram
    participant S as Student
    participant C as Pi reader
    participant F as Flask
    participant DB as Database
    participant D as Dashboard
    S->>C: Taps laptop tag
    C->>F: POST tap (card ID, time)
    Note over F: presence-event handler
    F->>DB: Save as ENTER in this period
    F-->>C: accepted
    loop every 2 seconds
        D->>F: GET classroom status
        F->>DB: Read this period's taps
        F-->>D: PRESENT or TARDY
    end

One tap, step by step: the reader posts the tap, Flask saves it, and the dashboard asks for status every 2 seconds.

Before: period running, nobody has tapped.

After: one tap, shown as Present.

← My Class & Card Tap Reader Build →

Project TeamRuta Sirdeshmukh, Vibha Mandayam, Kush Shah

MentorDr. Douglas Fenner

Working prototype · UHF pilot in progress

View Repo