Add ESP32-C3 SPI slave with ESP-NOW, Raspberry Pi test tools, and updated project structure

- ESP32-C3 SPI slave project with ESP-NOW broadcast functionality
- Raspberry Pi SPI master test tools and CLI for JSON communication
- Merged src/ directory from full branch with lighting controller code
- Updated Pipfile with system install scripts and ESP32 monitoring
- Added comprehensive test suite for SPI communication

test/quick_test.py

@@ -0,0 +1,64 @@
+#!/usr/bin/env python3
+"""
+Quick SPI test for basic functionality verification
+"""
+
+import spidev
+import time
+import sys
+import json
+
+def quick_spi_test():
+    """Quick test to verify SPI communication"""
+    print("Quick SPI Test")
+    print("=" * 30)
+    
+    try:
+        # Initialize SPI
+        spi = spidev.SpiDev()
+        spi.open(0, 0)  # Bus 0, Device 0
+        spi.max_speed_hz = 1000000  # 1MHz
+        spi.mode = 0  # SPI Mode 0
+        spi.bits_per_word = 8
+        
+        print("SPI initialized successfully")
+        print(f"Mode: {spi.mode}, Speed: {spi.max_speed_hz}Hz")
+        
+        # Test 1: Simple byte
+        print("\nTest 1: Single byte (0xAA)")
+        response = spi.xfer2([0xAA])
+        print(f"Sent: [0xAA], Received: {[hex(b) for b in response]}")
+        
+        # Test 2: Multiple bytes
+        print("\nTest 2: Multiple bytes")
+        test_data = [0x01, 0x02, 0x03, 0x04]
+        response = spi.xfer2(test_data)
+        print(f"Sent: {[hex(b) for b in test_data]}")
+        print(f"Received: {[hex(b) for b in response]}")
+        
+        # Test 3: Hello message
+        print("\nTest 3: Hello message")
+        hello = [0x48, 0x65, 0x6C, 0x6C, 0x6F]  # "Hello"
+        response = spi.xfer2(hello)
+        print(f"Sent: {[hex(b) for b in hello]} ({''.join([chr(b) for b in hello])})")
+        print(f"Received: {[hex(b) for b in response]}")
+
+        # Test 4: JSON message
+        print("\nTest 4: JSON message")
+        payload = {"d":{"t":"b","br":128},"bar":{"pt":"off"}}
+        json_bytes = list(json.dumps(payload, separators=(",",":"))).encode("utf-8")
+        response = spi.xfer2(list(json.dumps(payload, separators=(",",":"), ensure_ascii=False).encode("utf-8")))
+        print(f"Sent JSON: {json.dumps(payload)}")
+        print(f"Received: {[hex(b) for b in response]}")
+        
+        spi.close()
+        print("\nTest completed successfully!")
+        return True
+        
+    except Exception as e:
+        print(f"Test failed: {e}")
+        return False
+
+if __name__ == "__main__":
+    success = quick_spi_test()
+    sys.exit(0 if success else 1)