SIMUT Dashboard

SIMUT

Integrated Monitoring & Telemetry System

Professional-grade IoT firmware for Raspberry Pi Pico W
Offline-first · Dual-core · TFT touch dashboard · OTA updates · RBAC · i18n

CI Version License: MIT Platform

Quick Start · Features · Screenshots · Documentation · Contribute

Why SIMUT?

Need DIY Arduino Sketch ESPHome / Tasmota SIMUT
Standalone with display ⚠️ Manual coding ❌ No TFT support ✅ Built-in touch UI
Regulated environments ❌ No audit trail ❌ No user RBAC ✅ Multi-user, audit logs
Cold chain (−80 °C to +45 °C) ⚠️ Basic readings ✅ Basic monitoring ✅ Calibrated multi-sensor
100% offline operation ✅ Yes ❌ Often cloud-only ✅ Local web + display
OTA firmware updates ❌ Manual reflash ✅ OTA ✅ OTA + backup/restore
Enterprise security ❌ None ⚠️ Basic ✅ HMAC-SHA256 + RBAC + rate limiting

SIMUT is for: laboratories, pharmacies, blood banks, vaccine storage, food cold chain — anywhere you need standalone, secure, auditable temperature monitoring.

ESPHome / Tasmota may be better if: you already have Home Assistant and don’t need a local display.

Screenshots

TFT Dashboard Web UI TFT Demo
TFT Web Demo

Architecture

┌──────────────────────────────────────────────────────────────┐
│                     Raspberry Pi Pico W                      │
│  ┌──────────────────────┐  ┌────────────────────────────────┐│
│  │      Core 0          │  │         Core 1                 ││
│  │  ◆ AppManager        │  │  ◆ DisplayManager (dedicated)  ││
│  │  ◆ SensorManager     │◄─┼─ state / snapshots             ││
│  │  ◆ WebManager        │  │  ◆ TouchPriority               ││
│  │  ◆ TelemetryManager  │  │  ◆ 50 built-in themes          ││
│  │  ◆ CommandManager    │  │  ◆ i18n (PT / EN / ES)         ││
│  └──────────┬───────────┘  └────────────────────────────────┘│
│             │                                                │
│  ┌──────────┴──────────────────────────────────────────────┐ │
│  │  ◆ SPI → ILI9341 TFT 320×240 + XPT2046 Touch            │ │
│  │  ◆ 1-Wire (PIO) → DS18B20 ×10                           │ │
│  │  ◆ I2C → DHT22 Ambient                                  │ │
│  │  ◆ USB CDC → CLI Serial  ·  Bluetooth (BLE) → CLI       │ │
│  │  ◆ WiFi (CYW43439) → HTTP Server + Telemetry            │ │
│  └─────────────────────────────────────────────────────────┘ │
└──────────────────────────────────────────────────────────────┘

Quick Start

  1. Get the hardware
    Raspberry Pi Pico W · ILI9341 TFT 320×240 · XPT2046 touch · DS18B20 sensors · DHT22 · Buzzer · wiring guide

  2. Download firmware
    Latest release → firmware.uf2

  3. Flash the device
    Hold BOOTSEL, connect USB, drag the .uf2 file to the RPI-RP2 drive

  4. Connect
    Open http://simut.local in your browser — default admin password prints once on USB Serial

Features

Category Highlights
Dual-core Engine Core 0: sensors + network + web + telemetry. Core 1: dedicated display loop with lock-free snapshots
TFT Dashboard Real-time readings, history graphs, touch-driven settings, 50 built-in themes + custom theme support
Embedded Web Server Full management interface, live graphs, dark/light themes, file manager, gzip-compressed assets
Multi-user RBAC 10 permission bits, 3 simultaneous sessions, HMAC-SHA256 per-user random salt, brute-force protection
Dual Telemetry HTTP POST + MQTT with JSON/CSV/custom templates, TLS/SSL, configurable endpoints
Dual-channel CLI USB Serial + Bluetooth (BLE) with password-protected access via display PIN
OTA Updates Firmware upload via web UI, config snapshot preservation, automatic reboot with rollback
Internationalization English + Portuguese + Spanish via external language packs (LittleFS) — add your own
Enterprise Security HMAC-SHA256 auth, per-user random salt, exponential backoff rate limiting, crash forensics via watchdog
Audit Trail Persistent log system with rotation, CSV export, tamper-evident binary format
Backup & Restore Full LittleFS backup (.bkp format), CRC32 integrity verification, chip-ID binding

Hardware

Component Specification
MCU Raspberry Pi Pico W (RP2040, dual-core Cortex-M0+)
Display ILI9341 320×240 TFT (SPI)
Touch XPT2046 resistive touchscreen
Sensors DS18B20 1-Wire ×10 + DHT22 ambient (I2C)
Buzzer Passive piezo (PIO-driven)
Storage 2 MB internal flash (LittleFS)

Documentation

Guide Description
User Manual Complete hardware setup, display/web/CLI guide, troubleshooting
OTA Update Guide Firmware update over-the-air via web UI or curl
Recovery Guide Brick recovery after failed OTA, BOOTSEL rescue
Wiring Diagram Pinout and assembly instructions
Security Policy Threat model, credential handling, incident response

Contribute

SIMUT is open source (MIT). Contributions are welcome!

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