NFC Manufacturing & Commerce Platform
An NFC stack, end to end. ESP32 devices that take jobs over MQTT and write web addresses to tags, a batch card-writing machine run from a web console, a printer console for the artwork, and the storefront that sells the finished cards.
Three repos that only make sense together. One job runs from checkout, through artwork and printing, to a tag write that gets verified before the card passes.
- 01Cloud-controlled job delivery over MQTT
- 02Dynamic NDEF URL writes, verified per tag
- 03Captive-portal Wi-Fi onboarding
- 04Batch writer with pass/fail card sorting
- 05Dye-sublimation card printing over CUPS
- 06Stripe-backed storefront for the finished cards
The idea
NFC cards and tags you can reprogram remotely. A tag holds a web address. Tap it with a phone and it opens whatever that address points to: a setup flow, an account activation, a product page. The destination lives in the cloud instead of being burned into the tag, so a card can change what it does after it ships.
The hardware
- ESP32 with an NFC module
- Wi-Fi setup from a phone
- Reconnects on its own
- Writes a web address to each tag
- Verifies every write
- Works with any modern phone
- Jobs sent from the cloud
- Devices report status back
- Power tuned for long idle periods
The production line
Around the device sits everything else it takes to sell a card. A web console queues batch jobs and shows per-card progress as the run goes. A printer console drives a dye-sublimation printer for the artwork. A storefront takes the orders. The batch machine runs today against a simulated device. The physical mechanics are specced and waiting on the build.
- Queue a run from the browser
- Live per-card progress
- Pass/fail sorting with retries
- Dye-sublimation card printing
- Artwork upload and adjustment
- Every job logged
- Design and order online
- Card payments
- Order confirmation email