Flask backend and ui tweaks

.gitignore

@@ -53,6 +53,7 @@ pi_sysroot/
 # personal deploy target info
 scripts/deploy_target.json
 scripts/smartserow-ui.service
+scripts/smartserow-backend.service
 
 # script python artifacts
 scripts/__pycache__/

extra/themes/rei.json

@@ -3,7 +3,7 @@
     "background": "#404040",
     "foreground": "#EAEAEA",
     "highlight": "#FA1504",
-    "subdued": "#E47841"
+    "subdued": "#fda052"
   },
   "bright": {
     "background": "#fda052",

pi/ui/lib/screens/dashboard_screen.dart

@@ -76,21 +76,31 @@ class _DashboardScreenState extends State<DashboardScreen> {
                   Row(
                     mainAxisAlignment: MainAxisAlignment.end,
                     children: [
-                      Text(
+                      Expanded(
-                        'CHASSIS VOLTAGE ',
+                        flex: 3,
+                        child: Container(),
+                      ),
+                      Expanded(
+                        flex: 3,
+                        child: Text(
+                          'Chassis voltage ',
                           style: Theme.of(context).textTheme.titleMedium?.copyWith(
-                          fontSize: 80,
+                            fontSize: 60,
                             color: theme.subdued,
                             letterSpacing: 1,
                           ),
                         ),
-                      Text(
+                      ),
+                      Expanded(
+                        flex: 1,
+                        child: Text(
                           '${_voltage.toStringAsFixed(1)}V',
                           style: Theme.of(context).textTheme.titleMedium?.copyWith(
                             fontSize: 80,
                             color: _voltage < 11.9 ? theme.highlight : theme.foreground,
                           ),
                         ),
+                      )
                     ],
                   ),
 
@@ -125,7 +135,7 @@ class _DashboardScreenState extends State<DashboardScreen> {
 
                   // Bottom stats row
                   Row(
-                    mainAxisAlignment: MainAxisAlignment.spaceAround,
+                    mainAxisAlignment: MainAxisAlignment.spaceEvenly,
                     children: [
                       StatBox(label: 'RPM', value: _rpm.toString()),
                       StatBox(label: 'ENG', value: '$_temp°C'),

pi/ui/lib/screens/splash_screen.dart

@@ -20,13 +20,15 @@ class SplashScreen extends StatelessWidget {
           children: [
             Icon(
               Icons.terrain,
-              size: 120,
+              size: 240,
               color: theme.subdued,
+              // replace with custom logo later
             ),
             const SizedBox(height: 24),
             Text(
               'Smart Serow',
               style: Theme.of(context).textTheme.headlineLarge?.copyWith(
+                fontSize: 160,
                 color: theme.foreground,
                 fontWeight: FontWeight.bold,
               ),
@@ -35,6 +37,7 @@ class SplashScreen extends StatelessWidget {
             Text(
               status,
               style: Theme.of(context).textTheme.bodyLarge?.copyWith(
+                fontSize: 80,
                 color: theme.subdued,
               ),
             ),

pi/ui/lib/services/test_flipflop_service.dart

@@ -30,7 +30,7 @@ class TestFlipFlopService {
 
     _timer = Timer.periodic(const Duration(seconds: 2), (_) {
       // Toggle theme
-      ThemeService.instance.toggle();
+      // ThemeService.instance.toggle();
 
       // Surprise the navigator
       if (navigatorKey.currentState?.emotion == 'surprise') {

pi/ui/lib/widgets/stat_box.dart

@@ -13,7 +13,9 @@ class StatBox extends StatelessWidget {
   Widget build(BuildContext context) {
     final theme = AppTheme.of(context);
 
-    return Column(
+    return Expanded(
+      flex: 1,
+      child: Column(
         children: [
           Text(
             value,
@@ -31,6 +33,7 @@ class StatBox extends StatelessWidget {
             ),
           ),
         ],
+      )
     );
   }
 }

scripts/README.md

@@ -2,24 +2,34 @@
 
 Build, deploy, and setup helpers for the Smart Serow project.
 
-## Build & Deploy
+## UI Build & Deploy
 
 | Script | Purpose |
 |--------|---------|
 | `build.py` | Cross-compile Flutter app for ARM64. Runs `generate_theme.py` first. |
-| `deploy.py` | rsync bundle to Pi, optionally restart service |
+| `deploy.py` | rsync UI bundle to Pi, optionally restart service |
 | `build-deploy.py` | Convenience wrapper: build → deploy → restart |
 
 ```bash
-# Typical workflow
 python3 build.py              # Build only
 python3 deploy.py --restart   # Deploy and restart service
 python3 build-deploy.py       # All-in-one
-
+python3 build.py --clean      # Clean rebuild
-# Clean rebuild (clears CMake cache)
-python3 build.py --clean
 ```
 
+## Backend Deploy
+
+| Script | Purpose |
+|--------|---------|
+| `deploy_backend.py` | rsync Python backend to Pi, optionally restart service |
+
+```bash
+python3 deploy_backend.py             # Deploy only
+python3 deploy_backend.py --restart   # Deploy and restart service
+```
+
+Backend and UI are **completely independent** — separate paths, separate services, separate deploys.
+
 ## Theme Generation
 
 | Script | Purpose |
@@ -32,13 +42,19 @@ Called automatically by `build.py`. Looks for theme matching `navigator` in `con
 
 | Script | Purpose |
 |--------|---------|
-| `pi_setup.sh` | First-time Pi configuration (deps, permissions, systemd service) |
+| `pi_setup.sh` | First-time Pi config (deps, permissions, UI systemd service) |
-| `smartserow-ui.service.sample` | Systemd unit file template |
+| `smartserow-ui.service.sample` | UI systemd unit template |
+| `smartserow-backend.service.sample` | Backend systemd unit template |
 
 ```bash
-# On the Pi
+# On the Pi (UI)
 chmod +x pi_setup.sh
 ./pi_setup.sh
+
+# Backend service (manual for now)
+sudo cp smartserow-backend.service.sample /etc/systemd/system/smartserow-backend.service
+sudo systemctl daemon-reload
+sudo systemctl enable smartserow-backend
 ```
 
 ## Configuration
@@ -53,7 +69,10 @@ chmod +x pi_setup.sh
   "user": "pi",
   "host": "raspberrypi.local",
   "remote_path": "/opt/smartserow",
-  "service_name": "smartserow-ui"
+  "service_name": "smartserow-ui",
+  "assets_path": "~/smartserow-ui/assets",
+  "backend_path": "/opt/smartserow-backend",
+  "backend_service": "smartserow-backend"
 }
 ```
 

scripts/deploy_backend.py

@@ -0,0 +1,117 @@
+#!/usr/bin/env python3
+"""Deploy script for Smart Serow Python backend.
+
+Pushes backend source to Pi and optionally restarts service.
+Completely independent from UI deploy.
+"""
+
+import argparse
+import json
+import subprocess
+import sys
+import time
+from pathlib import Path
+
+
+SCRIPT_DIR = Path(__file__).parent.resolve()
+PROJECT_ROOT = SCRIPT_DIR.parent
+CONFIG_FILE = SCRIPT_DIR / "deploy_target.json"
+BACKEND_DIR = PROJECT_ROOT / "pi" / "backend"
+
+
+def run(cmd: list[str], check: bool = True, **kwargs) -> subprocess.CompletedProcess:
+    """Run a command."""
+    print(f"  → {' '.join(cmd)}")
+    return subprocess.run(cmd, check=check, **kwargs)
+
+
+def load_config() -> dict:
+    """Load deploy target configuration."""
+    if not CONFIG_FILE.exists():
+        print(f"ERROR: Config file not found: {CONFIG_FILE}")
+        print("Create it based on deploy_target.sample.json")
+        sys.exit(1)
+
+    with open(CONFIG_FILE) as f:
+        return json.load(f)
+
+
+def deploy(restart: bool = False) -> bool:
+    """Deploy backend to Pi. Returns True on success."""
+    config = load_config()
+
+    pi_user = config["user"]
+    pi_host = config["host"]
+
+    # Backend-specific config (with defaults)
+    remote_path = config.get("backend_path", "/opt/smartserow-backend")
+    service_name = config.get("backend_service", "smartserow-backend")
+
+    ssh_target = f"{pi_user}@{pi_host}"
+
+    print("=== Smart Serow Backend Deploy ===")
+    print(f"Target: {ssh_target}:{remote_path}")
+    print(f"Source: {BACKEND_DIR}")
+
+    if not BACKEND_DIR.exists():
+        print(f"ERROR: Backend directory not found: {BACKEND_DIR}")
+        return False
+
+    # Ensure remote directory exists
+    print()
+    print("Ensuring remote directory...")
+    run(["ssh", ssh_target, f"mkdir -p {remote_path}"])
+
+    # Sync backend source to Pi
+    # Exclude __pycache__, .venv, etc.
+    print()
+    print("Syncing files...")
+    run([
+        "rsync", "-avz", "--delete",
+        "--exclude", "__pycache__",
+        "--exclude", "*.pyc",
+        "--exclude", ".venv",
+        "--exclude", ".ruff_cache",
+        f"{BACKEND_DIR}/",
+        f"{ssh_target}:{remote_path}/",
+    ])
+
+    # Restart service if requested
+    if restart:
+        print()
+        print(f"Restarting service: {service_name}")
+        run(["ssh", ssh_target, f"sudo systemctl restart {service_name}"], check=False)
+        time.sleep(2)
+        run(["ssh", ssh_target, f"systemctl status {service_name} --no-pager"], check=False)
+    else:
+        print()
+        print("Deploy complete. To restart service, run:")
+        print(f"  ssh {ssh_target} 'sudo systemctl restart {service_name}'")
+        print()
+        print("Or run this script with --restart flag")
+
+    print()
+    print("Note: First-time setup on Pi requires:")
+    print(f"  ssh {ssh_target}")
+    print(f"  cd {remote_path}")
+    print("  curl -LsSf https://astral.sh/uv/install.sh | sh")
+    print("  uv sync")
+
+    return True
+
+
+def main():
+    parser = argparse.ArgumentParser(description="Deploy Smart Serow backend to Pi")
+    parser.add_argument(
+        "--restart", "-r",
+        action="store_true",
+        help="Restart the systemd service after deploy",
+    )
+    args = parser.parse_args()
+
+    success = deploy(restart=args.restart)
+    sys.exit(0 if success else 1)
+
+
+if __name__ == "__main__":
+    main()

scripts/deploy_target.sample.json

@@ -1,7 +1,13 @@
 {
   "user": "pi",
   "host": "raspberrypi.local",
+
+  "_comment_ui": "Flutter UI settings (deploy.py)",
   "remote_path": "/opt/smartserow",
   "service_name": "smartserow-ui",
-  "assets_path": "~/smartserow-ui/assets"
+  "assets_path": "~/smartserow-ui/assets",
+
+  "_comment_backend": "Python backend settings (deploy_backend.py)",
+  "backend_path": "/opt/smartserow-backend",
+  "backend_service": "smartserow-backend"
 }

scripts/smartserow-backend.service.sample

@@ -0,0 +1,19 @@
+[Unit]
+Description=Smart Serow GPS Backend
+After=network.target gpsd.service
+Wants=gpsd.service
+
+[Service]
+Type=simple
+User=pi
+Group=pi
+WorkingDirectory=/opt/smartserow-backend
+ExecStart=/home/pi/.local/bin/uv run python main.py
+Restart=always
+RestartSec=5
+
+# Environment
+Environment=PYTHONUNBUFFERED=1
+
+[Install]
+WantedBy=multi-user.target