Documentation Hub | AI Tech Talk & Support

AI Tech Talk & Support Platform

Enterprise ASP.NET Core 9.0 platform providing AI-assisted technical diagnostics, hardware control, subscription management, and professional board repair services. 12-project solution with multi-domain routing and full protocol stack support.

Platform Summary

PlatformASP.NET Core 9.0

Projects12 total (10 src/ + 2 shared/)

Primary Domainaitechtalkandsupport.com

AI EngineGroq API + OLLAMA (local)

Payment GatewayPayPal (Live)

Phone+1-629-276-9373

Address2321 E. 61 Avenue, Spokane WA 99223

Build Status0 errors, 2 harmless NuGet warnings

Domain Routing

Domain	Routes To	Purpose
`aitechtalkandsupport.com`	`landing-pro.html`	Customer landing page
`admin.aitechtalkandsupport.com`	`admin/server-control.html`	Admin control center
`payments.aitechtalkandsupport.com`	`payments/admin.html`	Payments management

Project Structure

Project	Purpose
AITechTalk.Web	Main web UI, Blazor/Razor, wwwroot static files
AITechTalk.API	REST API backend, all /api/* endpoints
AITechTalk.AIEngine	AI bot orchestration, 6 bots, Groq API client
AITechTalk.SerialDataPro	Hardware/serial/PDU control, ESP32 bridge
AITechTalk.Payments	Stripe + PayPal payment processing
AITechTalk.Twilio	Voice/SMS via Twilio
AITechTalk.DeviceService	Device management and registry
AITechTalk.Worker	Background workers and scheduled tasks
AITechTalk.AppHost	Aspire orchestration host
AITechTalk.ServiceDefaults	Shared service configuration

Quick Start

Get the platform running locally in minutes. Prerequisites: .NET 9 SDK, Docker (for MQTT), Groq API key, PayPal developer account.

Setup Steps

Clone or open the solution: AITechTalkPlatform.sln in Visual Studio 2022 or dotnet run from the AppHost project.
Copy appsettings.example.json to appsettings.Development.json and fill in your API keys.
Start the MQTT broker: docker run -d -p 1883:1883 eclipse-mosquitto
Build the solution to confirm 0 errors: dotnet build
Run the platform: dotnet run --project src/AITechTalk.AppHost
Open your browser and navigate to http://localhost:5000/landing-pro.html

Required Configuration

// appsettings.Development.json
{
  "Groq": { "ApiKey": "gsk_your_key_here" },
  "PayPal": { "ClientId": "AREQm-HY..." },
  "Mqtt": { "Host": "localhost", "Port": 1883 },
  "Hardware": { "SerialPort": "COM3", "BaudRate": 115200 },
  "Twilio": { "AccountSid": "AC...", "AuthToken": "..." }
}

Platform Architecture

The platform uses a multi-project ASP.NET Core 9.0 architecture with Aspire orchestration, subdomain routing middleware, and hardware integration via serial/ESP32 gateway.

AI Bot System

Bot Name	Model	Specialty
Automotive Specialist	`wizardlm-uncensored:13b`	ECU, CAN bus, OBD-II, IMMO
IoT Expert	`dolphin3-llama3.1:8b`	ESP32, MQTT, sensors, firmware
HVAC Technician	`hermes3:8b`	HVAC systems, climate control
Computer Support	`llama3.2-dark`	General hardware/software support
Electronics Pro	`pygmalion-uncensored:8b`	PCB, EEPROM, circuit analysis

Hardware Stack

Component	Role	Connection
16-ch Relay Module (LOW-LEVEL TRIGGER)	PDU / power distribution	ESP32 GPIO → Relay IN pins
ATX PC Power Supply	12V rail source	GREEN→BLACK jumper, YELLOW=+12V to relay COM
KICKPI H168 (×2)	SBC / OLLAMA nodes	CH 1-4 relay, Ethernet
BigTreeTech Pi 1.2.1	IoT control node	CH 3-4 relay, Ethernet
EAIDK310V	AI inference (NPU)	CH 5-6 relay, Ethernet
ESP32 Heltec HTIT-V32	PDU bridge / MQTT gateway	COM3 · DSD Tech SH-U09GN · 115200
Waveshare USB-to-All	Protocol programmer	USB · I2C/SPI/JTAG

AI Chat API

The AI chat endpoint routes queries to the appropriate specialist bot via Groq API. All requests must include a message and agentType.

Endpoints

Method	Endpoint	Description
POST	`/api/ai/chat`	Send a message to an AI specialist bot

Request Body

// POST /api/ai/chat
{
  "message": "What is the UDS diagnostic flow for P0300?",
  "agentType": "automotive",
  "modelId": "wizardlm-uncensored:13b"  // optional
}

Agent Types

automotiveAutomotive Specialist

iotIoT Expert

hvacHVAC Technician

computerComputer Support

electronicsElectronics Pro

Payments API

Payment processing via PayPal. Orders are created client-side using the PayPal SDK and confirmed server-side after capture.

Endpoints

Method	Endpoint	Description
POST	`/api/payments/process`	Record a captured PayPal payment
GET	`/api/payments/subscriptions`	List active subscriptions
GET	`/api/payments/history`	Transaction history

Process Payment Body

{
  "orderId": "5O190127TN364715T",
  "serviceType": "professional",  // starter|professional|board-repair
  "amount": 49.99,
  "email": "customer@email.com",
  "name": "John Doe",
  "phone": "+1-555-123-4567"
}

Hardware API

Control relay channels, fan speeds, and connected devices via the PDU orchestrator service. Requests are routed through the ESP32 serial bridge.

PDU Relay Endpoints

Method	Endpoint	Description
GET	`/api/pdu/status`	All 16 relay channel states
POST	`/api/pdu/channel/{n}/on`	Turn on relay channel N (1-16)
POST	`/api/pdu/channel/{n}/off`	Turn off relay channel N
POST	`/api/hardware/fans`	Set fan speeds (0-100%)
POST	`/api/hardware/fans/auto`	Enable auto fan control
POST	`/api/hardware/cyd/message`	Send text to ESP32 CYD display

Relay Channel Map

Channel(s)	Assignment
CH 1–4	SBC Power (KICKPI H168 ×2, BigTreeTech Pi)
CH 5–6	AI Lab Power (EAIDK310V)
CH 7–8	Automotive Scanners (KTAG / KESS2)
CH 9–10	I2C/SPI bus via Waveshare programmer
CH 11–12	JTAG bus via Waveshare programmer
CH 13–14	RF / RFID / IR modules
CH 15	Chassis fans
CH 16	Aux 12V rail

Tech News API

Tech news feed aggregated from RSS sources. Used in the landing page Tech News tab.

Endpoint

Method	Endpoint	Description
GET	`/api/news?category=&page=&limit=`	Fetch paginated tech news articles

Query Parameters

categoryall | ai | automotive | security | hardware

pageinteger (default: 1)

limitinteger (default: 9, max: 50)

Automotive Protocols

Supported automotive communication protocols and diagnostic standards.

Supported Protocols

OBD-II

UDS (ISO 14229)

CAN bus

CAN-FD

J2534

K-Line

LIN bus

IMMO / BCM

FlexRay

DoIP (Eth)

UDS Service IDs

SID	Service Name	Description
`0x10`	Diagnostic Session Control	Switch diagnostic session modes
`0x11`	ECU Reset	Soft/hard reset of the ECU
`0x22`	Read Data By Identifier	Read parameter IDs (PIDs)
`0x27`	Security Access	Seed/key authentication
`0x2E`	Write Data By Identifier	Write calibration or config values
`0x31`	Routine Control	Execute diagnostic routines
`0x34`	Request Download	Begin flash programming session
`0x36`	Transfer Data	Transfer firmware/calibration data
`0x19`	Read DTC Information	Read fault codes (DTCs)

Embedded & IoT Protocols

Low-level communication protocols supported for embedded systems, IoT devices, and hardware programming.

Supported Protocols

UART

I2C

SPI

JTAG

SWD

1-Wire

RS-232

RS-485

MQTT

ESP-NOW

RFID

RF 433MHz

IR

Modbus RTU

EEPROM / Flash Operations

Read EEPROMI2C or SPI via Waveshare programmer

Write EEPROMPage-write mode with verify

Flash ProgrammingJTAG/SWD via Waveshare or J-Link

EraseSector or chip erase supported

Hardware Setup

Physical hardware setup guide for the relay PDU, ATX PSU, and SBC connections.

ATX PSU Configuration

Jump the GREEN wire (PS_ON) to any BLACK wire (GND) on the ATX 24-pin connector to enable standalone operation without a motherboard.
Connect YELLOW (+12V) to the relay module COM terminals. This provides the switched 12V output power.
Connect BLACK (GND) from PSU to relay module GND and all device ground references.
The relay module is LOW-LEVEL TRIGGER — the relay activates when the ESP32 GPIO goes LOW (0V). Keep this in mind when writing firmware.
Connect relay NO (Normally Open) contacts to device power inputs. Devices are OFF by default (safe state).

SBC Power Connections

// Relay channel to device mapping
CH1  → KICKPI H168 #1 power input (+12V via relay NO)
CH2  → KICKPI H168 #2 power input (+12V via relay NO)
CH3  → BigTreeTech Pi 1.2.1 (+5V adapter via relay)
CH4  → BigTreeTech Pi #2 (reserved)
CH5  → EAIDK310V AI Lab (+12V via relay)
CH6  → EAIDK310V secondary rail
CH7  → KTAG automotive scanner
CH8  → KESS2 automotive programmer
CH9  → I2C/SPI bus power (Waveshare)
CH10 → SPI target device power
CH11 → JTAG target device power
CH12 → JTAG secondary
CH13 → RF module power
CH14 → RFID/IR module power
CH15 → Chassis fans
CH16 → Aux 12V rail (general purpose)

PDU Relay Control

The PDU Orchestrator service manages the 16-channel relay module through the ESP32 serial bridge. The PDUController exposes REST endpoints consumed by the admin UI.

Key Files

PDU ServiceAITechTalk.SerialDataPro/Services/PDUOrchestrator.cs

API ControllerAITechTalk.SerialDataPro/Controllers/PDUController.cs

ESP32 Firmwarefirmware/ESP32_PDU_Bridge/ESP32_PDU_Bridge.ino

Wiring Diagramdocs/ATX-PSU-RELAY-WIRING-DIAGRAM.md

Config Keyappsettings.json → "Hardware"

Serial Protocol

// Command format (ASCII over UART @ 115200 baud)
RELAY:ON:CH{n}   // Turn on relay N (1-16)
RELAY:OFF:CH{n}  // Turn off relay N
RELAY:STATUS     // Get all 16 channel states
// Response: STATUS:1,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0

ESP32 Firmware

The ESP32 Heltec HTIT-V32 runs the PDU bridge firmware, listening on UART (COM3) for relay commands from the ASP.NET backend and bridging them to the 16-channel relay module via GPIO.

Setup

Install Arduino IDE and add the ESP32 board manager URL: https://dl.espressif.com/dl/package_esp32_index.json
Install DSD Tech SH-U09GN USB-to-TTL driver. Connect to COM3 at 115200 baud.
Open firmware/ESP32_PDU_Bridge/ESP32_PDU_Bridge.ino in Arduino IDE.
Select board: Heltec WiFi Kit 32 or compatible ESP32 variant.
Upload the firmware. The ESP32 will begin listening on Serial at 115200 baud.

GPIO Relay Mapping

// ESP32 GPIO → Relay IN pin mapping
// Relay module: LOW-LEVEL TRIGGER (GPIO LOW = relay ON)
GPIO 4  → Relay CH1  (KICKPI #1)
GPIO 5  → Relay CH2  (KICKPI #2)
GPIO 16 → Relay CH3  (BigTreeTech #1)
GPIO 17 → Relay CH4  (BigTreeTech #2)
GPIO 18 → Relay CH5  (EAIDK #1)
GPIO 19 → Relay CH6  (EAIDK #2)
GPIO 21 → Relay CH7  (KTAG)
GPIO 22 → Relay CH8  (KESS2)
// ... CH9-16 on GPIO 23, 25, 26, 27, 32, 33, 34, 35

Subscription Plans

Three-tier subscription model processed through PayPal. Customers subscribe via the landing page payment section.

Plan Comparison

Feature	Starter $9.99/mo	Professional $49.99/mo	Enterprise Custom
AI Queries/Month	100	1,000	Unlimited
AI Models Access	2 models	All 5 models	All + custom
Email Support	✓	✓	✓
Priority Support	✗	✓	✓
Custom Training	✗	✓	✓
API Access	✗	✓	✓
SLA Guarantee	✗	✗	✓

Platform Changelog

History of major platform changes, fixes, and features.

2026

2026-03-07 Feature Full enterprise UI rebuild — all HTML pages rebuilt to service-info.html design system (dark theme, Segoe UI, tab-based navigation)

2026-03-06 Feature PDU Orchestrator created — PDUOrchestrator.cs, PDUController.cs, ESP32_PDU_Bridge.ino, ATX wiring diagram

2026-03-06 Fix Complete warning cleanup — 186 code warnings resolved to 0 (CS8603, CS1998, CA2021, CA2022 and more)

2026-03-06 Feature AiChatEndpoints.cs created — /api/ai/chat endpoint wired to GroqService for real AI responses

2026-03-06 Fix Removed Flask Jinja2 template syntax from admin/dashboard.html (url_for, config.AI_MODEL, etc.)

2026-03-06 Fix Fixed index.html AI chat to route through /api/ai/chat instead of direct OLLAMA hostname

2026-03-06 Infra SubdomainRoutingMiddleware updated — admin subdomain now routes to admin/server-control.html

Recommended Tools & Resources

Essential open-source tools, partner services, and APIs used across the AI Tech Talk & Support platform for diagnostics, firmware development, reverse engineering, and network analysis.

Automotive & Diagnostics

SavvyCAN

savvycan.com

Open-source CAN bus reverse engineering and analysis tool. Capture, filter, and decode CAN frames from OBD-II, J1939, and UDS protocols. Works with SocketCAN and GVRET interfaces.

Open Source

NHTSA VIN Decoder

vpic.nhtsa.dot.gov

Free government VIN lookup API. Decode any 17-character VIN to get make, model, year, engine, transmission, body type, and plant info. No API key required. JSON/XML response.

Free API

PicoScope

picotech.com

Professional automotive oscilloscope for waveform analysis. Diagnose injectors, ignition coils, CAN bus signals, sensor outputs, and ECU drive circuits. Industry standard for automotive electrical diagnostics.