Identify programmable OBD‑II hardware with cellular and Wi‑Fi

Objective: Identify programmable OBD-II hardware solutions that support cellular (SIM) and Wi-Fi connectivity for real-time AI data transmission, specifically targeting custom-built or open-source "Snapshot-style" form factors. Search Parameters: 1. Programmable OBD-II Boards: Research developer-friendly platforms like AutoPi (Raspberry Pi-based), Macchina (A0/M2 boards), and Freematics ONE+ (ESP32-based). 2. Custom Integrated Solutions: Search for "OBD-II Dongle Development Kits" that feature integrated SIM slots (4G/LTE/Cat-M1) and expandable microcontrollers (STM32 or ESP32). 3. Modular "Motherboard" Alternatives: Look for ultra-small cellular IoT modules (e.g., Particle Boron, Blues Wireless Notecard, or LilyGO T-SIM) that can be interfaced with an OBD-II UART adapter within a custom 3D-printed housing. 4. Hardware Capability Checklist: - Connectivity: Wi-Fi + Nano-SIM (LTE/4G). - Programmability: Python, C++, or MicroPython support. - Power: Sleep-mode functionality to prevent vehicle battery drain. - Protocol Support: Full ISO 15765-4 (CAN bus) compatibility. Technical Constraints: - Form Factor: Must be "dongle" style or small enough to be "stealth" (similar to Progressive Snapshot). - Security: Must support encrypted data transmission for user privacy. Output Format: - Device/Board Name: (e.g., Freematics ONE+ Model B). - Core Processor: (e.g., ESP32-S3). - Connectivity Options: SIM/LTE, Wi-Fi, Bluetooth. - Developer Ecosystem: Available libraries, SDKs, and community support. - Cost per Unit: Prototype vs. Bulk (10+ units). - Compatibility Note: How easily it fits into a standard OBD-II port housing.