Add Pico presets engine, patterns, and tests.

Wire the Pico to UART-driven preset selection, add pattern modules and presets data, remove old p2p/settings code, and update tests and LED driver.

Made-with: Cursor

pico/test/test_serial_receive.py

@@ -0,0 +1,32 @@
+#!/usr/bin/env python3
+"""
+Serial receive test – single file. Run on Pico (RX side).
+Wire: ESP32 TX (GPIO17) → Pico RX (GPIO1); GND ↔ GND. Run send test on ESP32.
+  mpremote run pico/test/test_serial_receive.py
+"""
+import time
+import sys
+from machine import UART, Pin
+
+if "esp32" in sys.platform:
+    UART_ID, TX_PIN, RX_PIN, BAUD = 1, 17, 18, 115200
+else:
+    UART_ID, TX_PIN, RX_PIN, BAUD = 0, 0, 1, 115200
+
+print("UART receive: %s UART%d TX=%s RX=%s %d baud (10 s)" % (sys.platform, UART_ID, TX_PIN, RX_PIN, BAUD))
+uart = UART(UART_ID, baudrate=BAUD, tx=Pin(TX_PIN, Pin.OUT), rx=Pin(RX_PIN, Pin.IN))
+buf = bytearray()
+deadline = time.ticks_add(time.ticks_ms(), 10000)
+while time.ticks_diff(deadline, time.ticks_ms()) > 0:
+    n = uart.any()
+    if n:
+        buf.extend(uart.read(n))
+    while b"\n" in buf:
+        idx = buf.index(b"\n")
+        line = bytes(buf[:idx]).strip()
+        buf = buf[idx + 1:]
+        if line:
+            print("rx:", line.decode("utf-8", "replace"))
+    time.sleep_ms(10)
+uart.deinit()
+print("Receive test done.")