steinhelge
a544594769
- cabin_node: subscribes to local MQTT (ESPHome sensors), sends temperature, battery voltage/SOC and switch states over LoRa SF12 - cabin_gw: receives LoRa packets, publishes JSON to home MQTT broker - Bidirectional: gateway forwards ON/OFF commands from home HA to node - cabin_node always in RX mode (12V powered) — commands arrive instantly - ESPHome config for ESP32 on teknisk rom: Victron MPPT BLE + JBD BMS BLE + DS18B20 temperatures + GPIO switches for varme/VVB Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
87 lines
2.5 KiB
Markdown
87 lines
2.5 KiB
Markdown
# hytte_link
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LoRa-basert sensorlink mellom hytte og hjemme. Sender temperatur (inne/ute),
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batterispenning og SOC fra 12V-anlegg på hytta til MQTT-broker hjemme (alu).
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## Arkitektur
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```
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Hytte:
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DS18B20 (inne/ute) ──┐
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Victron MPPT (BLE) ──┤
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JBD BMS (BLE) ────── ESP32 (ESPHome, cabin_tech) ──WiFi──► MQTT (lokal HA)
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│
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XIAO ESP32S3 + Wio-SX1262 ◄──MQTT────┘
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(cabin_node)
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│ LoRa SF12 868 MHz
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▼ 15–20 km
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Hjemme: XIAO ESP32S3 + Wio-SX1262
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(cabin_gw)
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│ MQTT publish
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▼
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mosquitto (alu, 192.168.86.31)
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│
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Home Assistant hjemme
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```
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## Bygging (PlatformIO)
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```bash
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pio run -e cabin_node # hytte-node
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pio run -e cabin_gw # hjemme-gateway
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pio run -e cabin_node -t upload
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pio run -e cabin_gw -t upload
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```
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## ESPHome (cabin_tech)
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```bash
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esphome run esphome/cabin_tech.yaml
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```
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## Secrets
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Kopier `include/secrets.example.h` → `include/secrets.h` og fyll inn.
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Kopier `esphome/secrets.yaml.example` → `esphome/secrets.yaml` og fyll inn.
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## LoRa-parametere
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| Parameter | Verdi |
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|-------------|--------|
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| Frekvens | 868 MHz |
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| SF | 12 |
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| BW | 125 kHz |
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| CR | 4/5 |
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| Sync word | 0xAB |
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| Airtime | ~1.3 s |
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## Pakkeformat (CabinPacket, 12 bytes)
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| Felt | Type | Enhet |
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|--------------|---------|-----------|
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| magic | uint8 | 0xCA |
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| seq | uint8 | rullende |
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| temp_in_x10 | int16 | °C × 10 |
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| temp_out_x10 | int16 | °C × 10 |
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| batt_mv | uint16 | mV |
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| batt_pct | uint8 | 0–100 |
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| sig | uint32 | HMAC-SHA256 (trunkert) |
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## Pinner (Wio-SX1262 på XIAO ESP32S3)
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Verifiser mot Seeed-skjema før flashing:
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- NSS: GPIO44 (D7)
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- RST: GPIO43 (D6)
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- DIO1: GPIO2 (D1)
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- BUSY: GPIO1 (D0)
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## MQTT-topics
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| Topic | Retning |
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|------------------------|----------------------|
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| hytte/sensor/temp_inne | ESPHome → cabin_node |
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| hytte/sensor/temp_ute | ESPHome → cabin_node |
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| hytte/sensor/batt_mv | ESPHome → cabin_node |
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| hytte/sensor/batt_pct | ESPHome → cabin_node |
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| hytte/lora/status | cabin_gw → alu |
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