first commit juggling ball and bridge code

Author: jedgarpark

ESP-NOW_Juggling/boot.py

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+# SPDX-FileCopyrightText: 2025 John Park for Adafruit Industries
+#
+# SPDX-License-Identifier: MIT
+"""
+ESP-NOW MIDI Juggling Bridge
+boot.py - Minimal configuration for USB MIDI only
+"""
+
+import usb_hid
+import usb_midi
+
+# Disable everything except MIDI
+usb_hid.disable()  # No HID devices
+usb_midi.enable()  # Only MIDI
+
+print("Minimal USB MIDI configuration loaded")

ESP-NOW_Juggling/esp-now-midi-ball.py

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+# SPDX-FileCopyrightText: 2025 John Park for Adafruit Industries
+#
+# SPDX-License-Identifier: MIT
+"""
+ESP-NOW MIDI Juggling Ball
+communicates to Feather TFT connected to computer/synth via USB
+"""
+
+import time
+import wifi
+import espnow
+import board
+import neopixel
+import analogio
+import adafruit_lis3dh
+
+# CONFIGURATION: Set this for each device
+DEVICE_ID = "ball_A"  # Options: "ball_A", "ball_B", "ball_C"
+
+# Sleep configuration -- light sleep, will wake on tap detection
+SLEEP_AFTER = 30  # Seconds of inactivity before sleep turns off NeoPixels/radio
+
+# Device list
+DEVICES = ["ball_A", "ball_B", "ball_C"]
+
+ALL_COLORS = [0xEE0010, 0x00FF00, 0x0010EE]  # indexed to DEVICES
+
+# Current color state (starts with device's default)
+current_color_index = DEVICES.index(DEVICE_ID)
+CURRENT_COLOR = ALL_COLORS[current_color_index]
+
+NUM_PIX = 2  # 2 for PCB version, however many you want for BFF
+# Set up NeoPixel and I2C for accelerometer
+pixel = neopixel.NeoPixel(board.A0, NUM_PIX)  # board.A0 for PCB, A3 for BFF
+pixel.brightness = 1.0
+pixel.fill(CURRENT_COLOR)
+
+# Set up battery monitoring
+voltage_pin = analogio.AnalogIn(board.A2)
+
+
+def get_battery_voltage():
+    """Read battery voltage from A2 pin"""
+    # Take the raw voltage pin value, and convert it to voltage
+    voltage = (voltage_pin.value / 65536) * 2 * 3.3
+    return voltage
+
+
+# Initialize I2C and LIS3DH accelerometer
+try:
+    # i2c = board.STEMMA_I2C()  # use this if connecting to STEMMA QT
+    i2c = board.I2C()
+    try:
+        lis3dh = adafruit_lis3dh.LIS3DH_I2C(i2c, address=0x18)
+        print("LIS3DH address: 0x18")
+    except ValueError:
+        lis3dh = adafruit_lis3dh.LIS3DH_I2C(i2c, address=0x19)
+        print("LIS3DH address: 0x19")
+    lis3dh.range = adafruit_lis3dh.RANGE_2_G
+    lis3dh.set_tap(1, 90)
+    has_accelerometer = True
+    print("LIS3DH accelerometer initialized with tap detection")
+except Exception as e:
+    print(f"Accelerometer init failed: {e}")
+    has_accelerometer = False
+
+
+# Channel switching hack
+wifi.radio.start_ap(" ", "", channel=6, max_connections=0)
+wifi.radio.stop_ap()
+
+
+def format_mac(mac_bytes):
+    return ":".join(f"{b:02x}" for b in mac_bytes)
+
+
+def get_my_mac():
+    return format_mac(wifi.radio.mac_address)
+
+
+def cycle_color():
+    """Cycle to the next color in the list"""
+    global current_color_index, CURRENT_COLOR  # pylint: disable=global-statement
+    current_color_index = (current_color_index + 1) % len(ALL_COLORS)
+    CURRENT_COLOR = ALL_COLORS[current_color_index]
+    pixel.fill(CURRENT_COLOR)
+    print(f"Color changed to: {CURRENT_COLOR:06X}")
+
+
+def flash():
+    """Quick flash for tap feedback"""
+    pixel.fill((200, 200, 200))
+    time.sleep(0.15)
+    pixel.fill(CURRENT_COLOR)
+
+
+def enter_sleep():
+    """Enter low-power sleep mode"""
+    global is_sleeping  # pylint: disable=global-statement
+    # print("Entering sleep mode - turning off NeoPixels and radio")
+    pixel.fill((0, 0, 0))  # Turn off all NeoPixels
+    pixel.brightness = 0
+    wifi.radio.stop_ap()  # Turn off radio
+    is_sleeping = True
+
+
+def wake_up():
+    """Wake from sleep mode"""
+    global is_sleeping, last_activity_time  # pylint: disable=global-statement
+    # print("Waking up - restoring NeoPixels and radio")
+    pixel.brightness = 1.0
+    pixel.fill(CURRENT_COLOR)
+    # Restart radio
+    wifi.radio.start_ap(" ", "", channel=6, max_connections=0)
+    wifi.radio.stop_ap()
+    is_sleeping = False
+    last_activity_time = time.monotonic()
+
+
+def check_tap():
+    """Check if accelerometer detects tap"""
+    if not has_accelerometer:
+        return False
+    try:
+        return lis3dh.tapped
+    except Exception as e:
+        print(f"Accelerometer read error: {e}")
+        return False
+
+
+def send_trigger_message(trigger_type="tap"):
+    """Send trigger message with current device color"""
+    current_time = time.monotonic()  # pylint: disable=redefined-outer-name
+    message = f"TRIGGER|{DEVICE_ID}|{trigger_type}|{current_time:.1f}"  # pylint: disable=redefined-outer-name
+
+    try:
+        e.send(message, broadcast_peer)
+        # print(f"TX: {message}")
+        flash()
+        return True
+    except Exception as ex:
+        print(f"Send error: {ex}")
+        return False
+
+
+def send_battery_report():
+    """Send battery voltage report to bridge with current color"""
+    voltage = get_battery_voltage()
+    current_time = time.monotonic()  # pylint: disable=redefined-outer-name
+    message = (  # pylint: disable=redefined-outer-name
+        f"BATTERY|{DEVICE_ID}|{voltage:.2f}|{CURRENT_COLOR:06X}|{current_time:.1f}"
+    )
+
+    try:
+        e.send(message, broadcast_peer)
+        print(f"TX Battery: {message} ({voltage:.2f}V, color: {CURRENT_COLOR:06X})")
+        return True
+    except Exception as ex:
+        print(f"Battery report send error: {ex}")
+        return False
+
+
+# Initialize ESP-NOW
+e = espnow.ESPNow()
+broadcast_peer = espnow.Peer(mac=b"\xff\xff\xff\xff\xff\xff", channel=6)
+e.peers.append(broadcast_peer)
+
+my_mac = get_my_mac()
+print(f"{DEVICE_ID} ball starting - MAC: {my_mac}, Color: {CURRENT_COLOR:06X}")
+
+# Clear accelerometer startup noise
+print("Initializing accelerometer...")
+time.sleep(0.5)
+if has_accelerometer:
+    print("Clearing startup tap artifacts...")
+    for i in range(10):
+        try:
+            tap_state = lis3dh.tapped
+            if tap_state:
+                print(f"Cleared startup tap {i + 1}")
+            time.sleep(0.1)
+        except Exception:
+            pass
+    print("Accelerometer ready for tap detection")
+
+# Timing variables
+last_tap_time = 0
+tap_debounce = 0.3
+startup_time = time.monotonic()
+startup_protection = 0.5
+
+# Sleep/wake tracking
+last_activity_time = time.monotonic()
+is_sleeping = False
+
+while True:
+    current_time = time.monotonic()  #  pylint: disable=redefined-outer-name
+
+    # Check for sleep timeout
+    if not is_sleeping and (current_time - last_activity_time > SLEEP_AFTER):
+        enter_sleep()
+
+    # Check for tap (primary trigger and wake-up source)
+    if has_accelerometer:
+        # Only check for taps after startup protection period
+        if current_time - startup_time > startup_protection:
+            if check_tap():
+                # If sleeping, wake up first
+                if is_sleeping:
+                    wake_up()
+
+                # Check debounce for actual trigger
+                if current_time - last_tap_time > tap_debounce:
+                    send_trigger_message("tap")
+                    last_tap_time = current_time
+                    last_activity_time = current_time
+        else:
+            # During startup protection, clear any false tap detections
+            if check_tap():
+                print("Ignoring tap during startup protection period")
+
+    # Check for incoming packets from bridge (only if not sleeping)
+    if not is_sleeping and e:
+        packet = e.read()
+        sender_mac = format_mac(packet.mac)
+
+        if sender_mac != my_mac:
+            message = packet.msg.decode("utf-8")  # pylint:disable=redefined-outer-name
+            last_activity_time = current_time  # Any message counts as activity
+
+            # Handle color change commands from bridge
+            if message.startswith("COLOR|"):
+                parts = message.split("|")
+                if len(parts) >= 3:
+                    target_device = parts[1]
+                    command = parts[2]
+
+                    # Only respond if this message is for us
+                    if target_device == DEVICE_ID and command == "next":
+                        cycle_color()
+                        # Send battery report when color changes
+                        send_battery_report()
+
+            # Handle trigger messages from other balls for visual feedback
+            # elif message.startswith("TRIGGER|"):
+            #     parts = message.split("|")
+            #     if len(parts) >= 4:
+            #         sender_device = parts[1]
+            #         trigger_type = parts[2]
+            #         print(f"Trigger from {sender_device} ({trigger_type})")
+            #         # Brief red flash for other ball triggers
+            #         flash()
+
+    time.sleep(0.01)  # Fast polling for responsive tap detection