Smart Inventory — Base Station

Inventory System

Base Station · ThingSpeak Cloud

CONNECTING

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Equipment Status

CLICK CARD → VIEW MAP

SIGMA 18-35MM

UID: 32001601

Last scan: —

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GPS TRACKED

DJI RONIN 4

UID: 2F8CFD90

Last scan: —

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ZHIYUN CRANE 4

UID: Not assigned

Last scan: —

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DJI AIR 3S

UID: Not assigned

Last scan: —

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GPS Telemetry

OFFLINE

Latitude

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Last update: —

Longitude

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Status Code

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Active RFID Item

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RFID update: —

Raw RFID UID · Field 5

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Hex tag ID scanned by MFRC522 reader

GPS Source · Field 6

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Status Code Explanation

0 → PRESENT logicB = LOW · item is at base station

1 → BORROWED logicA = HIGH & logicB = HIGH · checked out

2 → MISSING logicA = LOW & logicB = HIGH · not returned

System Link Status

Cloud Connection

ThingSpeak API api.thingspeak.com · Read channel

OFFLINE

Feed Entry # most recent entry received

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RFID Sub-system

Base ESP32 → Cloud ThingSpeak data received

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ATmega328P (UNO) ↔ ESP32 UART · RFID reader board

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GPS Sub-system

Moving ESP32 → Cloud via ESP-NOW → base → ThingSpeak

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ATmega328P (NANO) ↔ ESP32 UART · GPS moving unit board

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Info

Channel ID

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Link Status Guide

ONLINE / LINKED — data received in last 30 s.
OFFLINE / NO SIGNAL — timeout exceeded or no data.
ATmega328P is the microcontroller chip on the Arduino UNO (RFID board) and Arduino Nano (GPS moving unit). Each sends heartbeat packets to its paired ESP32 over UART. If the UART link breaks, the ESP32 stops receiving sensor data.

Live Location

Select an equipment card to view its location Only SIGMA 18-35MM has a GPS module

Geofence Controls

SIGMA 18-35MM · GPS UNIT ONLY

Center Latitude

14.590507

Center Longitude

120.977518

Radius

50 m

Last Confirmed

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Manual Center Input

Radius

How it works

Pressing any button here writes the new center & radius to Field 8 on ThingSpeak. The GPS ESP32 polls Field 8 every ~30 s, updates its internal geofence, recomputes INSIDE/OUTSIDE using Haversine distance, then writes the result to Field 7. The RFID ESP32 polls Field 7 and forwards the result to the Arduino UNO which drives the logic gates. Allow up to ~60 s for the full chain to propagate.

Last fetch: —