E-Waste Pickup Booking Android App with Certified Recycler Network

Old phones, laptops and chargers pile up in drawers because there is no trusted way to get rid of them. Much of India's e-waste still flows to informal scrap dealers who strip devices with unsafe methods, recovering only part of the metals while releasing hazardous substances into air, soil and groundwater. The formal route exists: under the E-Waste (Management) Rules, 2022 (notified November 2022, in force from 1 April 2023), e-waste must go to CPCB-authorised recyclers, and recyclers generate EPR certificates for the key metals they recover. But ordinary users cannot easily find or book these recyclers. This project builds an Android app that closes that gap: users pick e-waste categories with indicative per-kg rates, choose a recycler that displays its CPCB authorisation number, and book a pickup slot. They then receive two things informal channels never provide — a per-device data-wipe certificate issued before the pickup agent can mark the item received, and an EPR credit receipt that mirrors the recycler's filing on the CPCB portal.

1. The user selects e-waste categories and quantities; the app shows an indicative estimate using per-kg reference rates, clearly marked as an estimate, not a quote.
2. The user picks a recycler from the directory of CPCB-authorised recyclers, each card showing its authorisation number for verification on the CPCB EPR portal.
3. The user chooses a date from the 7-day strip, a 3-hour time slot and a saved address; the recycler accepts the request and a booking ID is generated.
4. For storage devices, the app runs a guided data wipe with the device in the user's hand (NIST SP 800-88 Purge, 3-pass, design reference) and issues a per-device certificate before the pickup agent can mark anything received.
5. The agent arrives in the slot, weighs items at the door, and the user approves the recycler's final quote inside the app before loading.
6. After the recycler processes the waste, the app issues an EPR credit receipt showing recovered fractions (ferrous, copper, aluminium, PCB/other) and referencing the recycler's filing on the CPCB portal.

Tech stack:

• Kotlin (Android app)
• Jetpack Compose (UI)
• Firebase Authentication
• Cloud Firestore (database)
• Firebase Cloud Messaging (notifications)
• Google Maps SDK (recycler locations)
• Material 3 (design system)
• REST API backend (recycler/admin services)

• [Category-based booking] Twelve e-waste categories (smartphones, laptops, CRT and LED monitors, printers, batteries and more) with indicative per-kg buyback rates; a quantity stepper shows an on-screen estimate before the recycler confirms the final quote at doorstep weighing.
• [CPCB-authorised recycler directory] Each recycler card shows its CPCB authorisation number, distance, pickup days and rating, and only authorised recyclers are listed — the regulatory backbone of the whole app, since e-waste given to unauthorised dealers is processed unsafely.
• [Slot-based pickup scheduling] A 7-day date strip plus 3-hour time slots and a saved pickup address; the booking generates a trackable booking ID once the recycler accepts the request.
• [Per-device data-wipe certificates] Storage devices (phones, laptops, tablets) get a guided wipe on NIST SP 800-88 Purge lines with a certificate recording the device, serial number, wipe method and SHA-256 wipe hash. Builder note from the build: the certificate is issued per device BEFORE the pickup agent's app unlocks "mark received" — that ordering is deliberate, because it removes the most common dispute in doorstep e-waste pickup: "received but never wiped".
• [EPR credit receipts] After processing, the app shows an EPR credit receipt with the recovered metal fractions and the recycler's CPCB portal filing reference, explaining the 2022 Rules' certificate chain in plain terms.
• [Live pickup tracking] A booking timeline runs from confirmation through wipe issuance, agent arrival, doorstep weighing with final-quote approval, to recycling completion.
• [Agent-side verification code] The pickup agent scans the user's wipe certificate code; the agent's app verifies it before "mark received" becomes tappable, so unwiped devices cannot enter the chain by accident.

• Complete Android app source code (Kotlin, Jetpack Compose)
• Firebase backend setup guide (Authentication, Firestore, Cloud Messaging)
• Working demo build with realistic sample screens and sample recycler data
• Recycler onboarding checklist with CPCB authorisation verification notes
• Project report PDF (background, E-Waste Rules 2022 summary, architecture, methodology)
• PPT presentation for final review
• Viva Q&A preparation document (Android concepts, Firebase, EPR and compliance flow)