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ThermIQ ASP1 — smart hybrid heating system documentation
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README.md

ThermIQ

Smart hybrid heating system for German residential properties using crypto miner waste heat, solar PV, battery storage, and a heat pump — controlled by a RevolutionPi PLC.

Concept

Crypto miners (Antminer S19J ASICs) generate significant waste heat. ThermIQ captures this heat and routes it into the building's heating circuit (Pufferspeicher / Warmwasserspeicher). A smart controller decides whether to source energy from the grid, solar panels, or battery storage — and coordinates the heat pump (Buderus WLW186i) as backup or supplement.

Project Structure

ThermIQ/
├── docs/
│   ├── HARDWARE.md          # All hardware components with specs
│   ├── ARCHITECTURE.md      # System architecture and topology
│   ├── SAFETY.md            # Safety layer and non-negotiable constraints
│   ├── COMMUNICATION.md     # RS485 Modbus, MQTT, gRPC, network topology
│   └── SCHALTSCHRANK.md     # Electrical cabinet design and wiring
├── src/
│   ├── miners/              # Miner integration (Braiins gRPC API)
│   └── nodered/             # Node-RED flows
├── CONTEXT.md               # Full AI context / knowledge base
└── README.md

Tech Stack

Layer Technology
PLC / Control RevolutionPi (Core + DIO + AIO)
Automation Node-RED (Modbus client, logic flows)
Message Bus MQTT (Mosquitto)
Visualization Home Assistant
Miner API Braiins OS gRPC (port 50051)
Inverter Deye via RS485 Modbus (sunsynk library)
Field Bus RS485 Modbus (energy meters, inverters)
HW Safety Dual-channel safety relay, hardware contactors

First Installation: Walda (ASP1)

  • Site: Walda, Germany
  • Miners: 2x Antminer S19J
  • Inverters: Deye hybrid
  • Heat pump: Buderus WLW186i
  • Pumps: 3x Wilo Stratos PICO plus (P3, P4, P5)
  • Valves: 2x Belimo C320Q-J (RV1, RV2)

Key Principles

  • Safety is purely hardware — never software-dependent
  • Miners must always be hard-disconnectable via contactors
  • Cloud is optional / read-only — never required for operation
  • No WiFi for critical energy components
  • Local-first architecture

Related

  • Shared team folder: ~/Nextcloud/Projekte/ThermIQ (do not commit here)
  • Prior Kryptoheat work: ~/Projects/Kryptoheat/