Prototype Wearable Contactless Payment Device
Publicada el 2026-07-25
Descripción de la oferta
I need a working proof-of-concept: a compact wearable that accepts payments from my proprietary contactless card and houses a SIM-enabled module to forward each transaction. The balance must live on the card itself at all times; the device simply reads, debits, and displays the updated amount on its touchscreen. Card top-ups will come directly from any mobile-banking app and will be limited to US $500 per load. The prototype has to be truly portable—think wristband, clip-on, or any small form you can demonstrate—and should communicate with the card over RFID. A basic test application or script that shows the balance changing after each tap is enough for the first milestone; clean, well-commented firmware and a simple schematic will be required at hand-off. Deliverables • Fully assembled wearable with touchscreen, RFID reader, and embedded SIM module • Pre-loaded demo contactless cards (or blank cards flashed with your firmware) • Source code, BOM, and wiring/schematic files • Quick user guide and a short video proving a charge and a spend cycle Acceptance criteria • Card retains and reports correct balance after multiple taps • Device powers up, processes a payment, and transmits basic transaction data over the SIM network without external peripherals • Top-up of US $500 from a standard mobile-banking app reflects instantly when the card is tapped again If you already have relevant RFID/NFC, embedded-Linux, ARM, or ESP-based experience, this should be straightforward. Let me know the chipset you plan to use and the turnaround time for the first functional unit. Please send me a single practical working 1- 2 cards sample 2- One device 3- Detail schematic and programing and manufacturing process price through inbox.
Skills
Fuente original: freelancer