Adrian Bretsch ba6622bed7 Initial commit: ThermIQ ASP1 documentation

All Markdown documentation files for the ThermIQ smart hybrid heating system.
PDFs excluded via .gitignore — generated on demand.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

2026-05-08 12:30:03 +02:00

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ThermIQ — Communication Architecture

Overview

Protocol	Usage	Physical
RS485 Modbus RTU	Deye inverter, energy meters	RS485 bus, USB gateway
MQTT	Internal data bus	Ethernet/TCP
gRPC	Miner Braiins OS API	Ethernet/TCP
LAN/Ethernet	All IP devices	Wired, industrial switch

RS485 Modbus RTU

Deye Hybrid Inverter

Protocol: RS485 Modbus RTU (NOT Modbus TCP — LAN interface unreliable)
Library: sunsynk running on Raspberry Pi
Reference: https://www.youtube.com/watch?v=u9df0YHfNtM
Data available: Solar production, battery SOC, grid power, load consumption
Connection: USB RS485 adapter → Raspberry Pi

Energy Meters

RS485 Modbus RTU
Polled by Node-RED running on Raspberry Pi
USB RS485 gateway on Raspberry Pi (or RevPi)

MQTT

Broker: Mosquitto, running on Raspberry Pi, localhost Port: 1883 (standard) Clients:

RevolutionPi: publishes field state, subscribes to setpoints
Node-RED: publishes Modbus data, subscribes to RevPi state
Home Assistant: subscribes to all topics (read-only visualization)

Topic Structure (planned)

thermiq/
├── miners/
│   ├── 1/state          # online | offline | error
│   ├── 1/power          # watts
│   ├── 1/hashrate       # TH/s
│   ├── 2/state
│   └── 2/power
├── pumps/
│   ├── p3/setpoint      # 0.0–10.0 V
│   ├── p4/setpoint
│   └── p5/setpoint
├── valves/
│   ├── rv1/state        # open | closed | moving
│   └── rv2/state
├── cooler/state         # on | off
├── heatpump/
│   ├── evu_sperre       # true | false
│   └── state            # running | blocked | fault
├── inverter/
│   ├── solar_power      # W
│   ├── battery_soc      # %
│   ├── grid_power       # W (negative = export)
│   └── load_power       # W
├── temps/
│   ├── puffer           # °C
│   ├── warmwasser       # °C
│   └── miner_outlet     # °C
└── safety/
    ├── state            # ok | tripped
    └── reason           # flow | temp | estop | none

Braiins OS gRPC API

Server: Antminer with Braiins OS, port 50051 Service: braiins.bos.v1.PerformanceService Auth: Bearer token in metadata Key methods:

GetTunerState — current power tuning state
Power scaling via tuner (reduce hash rate = reduce power = reduce heat)

Reference implementation: src/miners/client.js

Integration Pattern

Node-RED → HTTP/gRPC call → Antminer → response
                ↓
            MQTT publish → thermiq/miners/1/power

Network Configuration

Device	IP	Role
RevolutionPi	fixed (e.g. 192.168.0.10)	PLC, MQTT client
Raspberry Pi	fixed (e.g. 192.168.0.11)	MQTT broker, Node-RED, HA
Miner 1	fixed (e.g. 192.168.0.101)	Braiins gRPC
Miner 2	fixed (e.g. 192.168.0.102)	Braiins gRPC
Deye inverter	RS485 only	not on LAN

All wired Ethernet, no WiFi for critical devices
NTP time synchronization required on RevPi and RPi
VLAN optional but recommended for isolation
Industrial managed switch preferred

Deye RS485 Wiring Note

The Deye inverter's native Modbus TCP LAN interface is not trusted for production use. Use RS485 directly. Wire RS485 A/B to USB adapter on Raspberry Pi. Termination resistor at cable end if bus > 1 device.

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