jamesob
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local-llm
A comprehensive guide for building and configuring a high-end local machine to run state-of-the-art LLMs, with detailed hardware choices, BIOS tuning, and Docker-based model serving.
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FR-AI / ANALYSISWhy it is worth attention
It turns a cheap, widely available CYD ESP32 display board into a complete Stripe PromptPay payment terminal with no wiring, and packages the Stripe logic as a reusable open-source PlatformIO library.
Who it is for
- Thai developers and merchants using PromptPay
- ESP32 hobbyists building IoT payment devices
- Stripe integrators in Thailand prototyping a physical point-of-sale terminal
- Open-source hardware tinkerers working with CYD boards
Use cases
- Countertop PromptPay QR payment at small shops or pop-up stores
- Prototyping Stripe PromptPay acceptance on embedded hardware
- Learning how Stripe PaymentIntent and EMVCo QR payloads work
- Reusing the StripePromptPay library in other ESP32 projects
Strengths
- Uses the documented Stripe API to create a PaymentIntent and get the EMVCo QR payload in one call
- Self-contained CYD board includes screen, touch, and speaker, so no extra wiring is needed
- Stripe logic is a standalone PlatformIO library with no display dependencies
- Provides clear security guidance: gitignored secrets, restricted API keys, and key-roll instructions
Considerations
- Requires a Thai Stripe account with PromptPay enabled
- Firmware uses setInsecure() with no TLS certificate pinning
- Minimum amount is 10 THB because of Stripe's PromptPay floor
README quick start
Getting started
Description
A $6 PromptPay payment terminal — ESP32 + 2.8" touch screen, powered by Stripe. Enter amount, show QR, beep when paid. Thai/English UI.
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