# MacroPad Builder -- code.py # Works with: ESP32-S3 N16R8, ESP32-C3 Super Mini, ESP32-C3 Dev Board, # Seeed XIAO SAMD21 # # Drop this file and config.json onto your CIRCUITPY drive root. # Do NOT copy serve.py to the device -- that is only for running the # configurator website locally on your computer. # # Required libraries in CIRCUITPY/lib/: # adafruit_hid -- always required # adafruit_ssd1306 -- only if using SSD1306/SSD1309 OLED # adafruit_displayio_sh1107 -- only if using SH1106 OLED # adafruit_framebuf -- only if using any OLED # adafruit_bus_device -- only if using any OLED # # font5x8.bin must be in CIRCUITPY root if using an OLED display. import time import json import board import busio import analogio import digitalio import rotaryio import usb_hid import adafruit_hid.keyboard import adafruit_hid.keyboard_layout_us import adafruit_hid.keycode import adafruit_hid.consumer_control import adafruit_hid.consumer_control_code import adafruit_hid.mouse # --------------------------------------------------------------------------- # Debug mode -- set True to print pin resolution and events to serial console # Open a serial monitor (Mu Editor, screen, PuTTY) to see boot output and # confirm which buttons are being detected. # --------------------------------------------------------------------------- DEBUG = True def dbg(msg): if DEBUG: print(msg) # --------------------------------------------------------------------------- # Load config # --------------------------------------------------------------------------- try: with open('/config.json', 'r') as f: CONFIG = json.load(f) dbg('config.json loaded OK') dbg('Device: ' + str(CONFIG.get('device', 'not set'))) dbg('Buttons found: ' + str(len(CONFIG.get('buttons', {})))) except Exception as e: print('ERROR loading config.json: ' + str(e)) print('Make sure config.json is in the CIRCUITPY root folder.') CONFIG = {'buttons': {}, 'dial_modes': [], 'oleds': [], 'sliders': []} DEVICE = CONFIG.get('device', 'esp32s3_n16r8') # --------------------------------------------------------------------------- # Pin resolver # Each device maps the config.json pin ID to the CircuitPython board attr. # ESP32 boards: GPIO4 -> IO4 (CircuitPython uses IO not GPIO) # XIAO SAMD21: D0-D10 directly # --------------------------------------------------------------------------- PIN_MAP = { 'esp32s3_n16r8': { 'GPIO0': 'IO0', 'GPIO1': 'IO1', 'GPIO2': 'IO2', 'GPIO3': 'IO3', 'GPIO4': 'IO4', 'GPIO5': 'IO5', 'GPIO6': 'IO6', 'GPIO7': 'IO7', 'GPIO8': 'IO8', 'GPIO9': 'IO9', 'GPIO10': 'IO10', 'GPIO11': 'IO11', 'GPIO12': 'IO12', 'GPIO13': 'IO13', 'GPIO14': 'IO14', 'GPIO15': 'IO15', 'GPIO16': 'IO16', 'GPIO17': 'IO17', 'GPIO18': 'IO18', 'GPIO19': 'IO19', 'GPIO20': 'IO20', 'GPIO21': 'IO21', 'GPIO35': 'IO35', 'GPIO36': 'IO36', 'GPIO37': 'IO37', 'GPIO38': 'IO38', 'GPIO39': 'IO39', 'GPIO40': 'IO40', 'GPIO41': 'IO41', 'GPIO42': 'IO42', 'GPIO43': 'IO43', 'GPIO44': 'IO44', 'GPIO45': 'IO45', 'GPIO46': 'IO46', 'GPIO47': 'IO47', 'GPIO48': 'IO48', }, 'esp32c3_super_mini': { 'GPIO0': 'IO0', 'GPIO1': 'IO1', 'GPIO2': 'IO2', 'GPIO3': 'IO3', 'GPIO4': 'IO4', 'GPIO5': 'IO5', 'GPIO6': 'IO6', 'GPIO7': 'IO7', 'GPIO8': 'IO8', 'GPIO9': 'IO9', 'GPIO10': 'IO10', 'GPIO20': 'IO20', 'GPIO21': 'IO21', }, 'esp32c3_devkit': { 'GPIO0': 'IO0', 'GPIO1': 'IO1', 'GPIO2': 'IO2', 'GPIO3': 'IO3', 'GPIO4': 'IO4', 'GPIO5': 'IO5', 'GPIO6': 'IO6', 'GPIO7': 'IO7', 'GPIO8': 'IO8', 'GPIO9': 'IO9', 'GPIO10': 'IO10', 'GPIO18': 'IO18', 'GPIO19': 'IO19', 'GPIO20': 'IO20', 'GPIO21': 'IO21', 'GPIO43': 'IO43', 'GPIO44': 'IO44', }, 'xiao_samd21': { 'D0': 'D0', 'D1': 'D1', 'D2': 'D2', 'D3': 'D3', 'D4': 'D4', 'D5': 'D5', 'D6': 'D6', 'D7': 'D7', 'D8': 'D8', 'D9': 'D9', 'D10': 'D10', }, } def get_pin(config_pin_name): if not config_pin_name: return None dev_map = PIN_MAP.get(DEVICE, {}) board_attr = dev_map.get(config_pin_name) if board_attr and hasattr(board, board_attr): dbg(' ' + config_pin_name + ' -> board.' + board_attr) return getattr(board, board_attr) # Fallback: try name directly if hasattr(board, config_pin_name): dbg(' ' + config_pin_name + ' -> board.' + config_pin_name + ' (direct)') return getattr(board, config_pin_name) # Fallback: GPIO4 -> IO4 if config_pin_name.startswith('GPIO'): alt = 'IO' + config_pin_name[5:] if hasattr(board, alt): dbg(' ' + config_pin_name + ' -> board.' + alt + ' (GPIO->IO fallback)') return getattr(board, alt) print('WARNING: cannot resolve pin "' + config_pin_name + '" on device ' + DEVICE) return None # --------------------------------------------------------------------------- # HID setup # --------------------------------------------------------------------------- keyboard = adafruit_hid.keyboard.Keyboard(usb_hid.devices) layout = adafruit_hid.keyboard_layout_us.KeyboardLayoutUS(keyboard) consumer = adafruit_hid.consumer_control.ConsumerControl(usb_hid.devices) mouse = adafruit_hid.mouse.Mouse(usb_hid.devices) # --------------------------------------------------------------------------- # Key/consumer helpers # --------------------------------------------------------------------------- def keycode_for(name): KC = adafruit_hid.keycode.Keycode MAP = { 'ctrl': KC.LEFT_CONTROL, 'shift': KC.LEFT_SHIFT, 'alt': KC.LEFT_ALT, 'win': KC.LEFT_GUI, 'cmd': KC.LEFT_GUI, 'enter': KC.ENTER, 'esc': KC.ESCAPE, 'space': KC.SPACE, 'backspace': KC.BACKSPACE, 'delete': KC.DELETE, 'tab': KC.TAB, 'up': KC.UP_ARROW, 'down': KC.DOWN_ARROW, 'left': KC.LEFT_ARROW, 'right': KC.RIGHT_ARROW, 'home': KC.HOME, 'end': KC.END, 'pageup': KC.PAGE_UP, 'pagedown': KC.PAGE_DOWN, 'f1': KC.F1, 'f2': KC.F2, 'f3': KC.F3, 'f4': KC.F4, 'f5': KC.F5, 'f6': KC.F6, 'f7': KC.F7, 'f8': KC.F8, 'f9': KC.F9, 'f10': KC.F10, 'f11': KC.F11, 'f12': KC.F12, '=': KC.EQUALS, '-': KC.MINUS, '[': KC.LEFT_BRACKET, ']': KC.RIGHT_BRACKET, ';': KC.SEMICOLON, "'": KC.QUOTE, ',': KC.COMMA, '.': KC.PERIOD, '/': KC.FORWARD_SLASH, '\\': KC.BACKSLASH, '`': KC.GRAVE_ACCENT, '0': KC.ZERO, '1': KC.ONE, '2': KC.TWO, '3': KC.THREE, '4': KC.FOUR, '5': KC.FIVE, '6': KC.SIX, '7': KC.SEVEN, '8': KC.EIGHT, '9': KC.NINE, } if name in MAP: return MAP[name] if len(name) == 1 and name.isalpha(): return getattr(KC, name.upper(), None) return None def consumer_code_for(name): CC = adafruit_hid.consumer_control_code.ConsumerControlCode MAP = { 'MUTE': CC.MUTE, 'VOLUME_INCREMENT': CC.VOLUME_INCREMENT, 'VOLUME_DECREMENT': CC.VOLUME_DECREMENT, 'PLAY_PAUSE': CC.PLAY_PAUSE, 'SCAN_NEXT_TRACK': CC.SCAN_NEXT_TRACK, 'SCAN_PREVIOUS_TRACK': CC.SCAN_PREVIOUS_TRACK, 'BRIGHTNESS_INCREMENT': CC.BRIGHTNESS_INCREMENT, 'BRIGHTNESS_DECREMENT': CC.BRIGHTNESS_DECREMENT, } return MAP.get(name) # --------------------------------------------------------------------------- # State # --------------------------------------------------------------------------- config_slot = 0 # 0 = Config 1, 1 = Config 2 platform = 'pc' current_mode_index = 0 # --------------------------------------------------------------------------- # OLED setup # --------------------------------------------------------------------------- displays = [] for oled_cfg in CONFIG.get('oleds', []): driver = oled_cfg.get('driver', 'ssd1306_i2c') sda_pin = get_pin(oled_cfg.get('gpio_sda')) scl_pin = get_pin(oled_cfg.get('gpio_scl')) if sda_pin is None or scl_pin is None: print('OLED skipped: missing SDA/SCL pins') continue try: i2c = busio.I2C(scl_pin, sda_pin) addr_str = oled_cfg.get('i2c_address', '0x3C') addr = int(addr_str, 16) if driver in ('ssd1306_i2c', 'ssd1309'): import adafruit_ssd1306 height = 64 if driver == 'ssd1309' else 32 display = adafruit_ssd1306.SSD1306_I2C(128, height, i2c, addr=addr) elif driver == 'sh1106': import adafruit_displayio_sh1107, displayio displayio.release_displays() bus = displayio.I2CDisplay(i2c, device_address=addr) display = adafruit_displayio_sh1107.SH1107( bus, width=128, height=64, display_offset=96) else: print('Unknown OLED driver: ' + driver) continue displays.append({ 'display': display, 'mode': oled_cfg.get('display_mode', 'idle_status'), }) dbg('OLED ready: ' + driver + ' @ ' + addr_str) except Exception as e: print('OLED init failed: ' + str(e)) def oled_show(lines, display_obj): try: display_obj.fill(0) y = 0 for line in lines[:4]: display_obj.text(str(line), 0, y, 1) y += 10 display_obj.show() except Exception as e: print('OLED draw error: ' + str(e)) def update_displays(label=''): slot_label = 'CFG ' + str(config_slot + 1) for d in displays: mode = d['mode'] disp = d['display'] if mode == 'macro_label': oled_show([label, slot_label], disp) elif mode == 'idle_status': oled_show(['MacroPad', slot_label, 'Mode: ' + str(current_mode_index + 1)], disp) update_displays() # --------------------------------------------------------------------------- # Action execution # --------------------------------------------------------------------------- def execute_action(cfg): global config_slot, platform, current_mode_index if not cfg: return t = cfg.get('type') if t == 'hotkey': keys = cfg.get('keys', []) auto = cfg.get('auto_translate', False) codes = [] for k in keys: if not k: continue if auto and platform == 'mac' and k == 'ctrl': k = 'cmd' elif auto and platform == 'pc' and k == 'cmd': k = 'ctrl' kc = keycode_for(k) if kc: codes.append(kc) if codes: keyboard.send(*codes) dbg('hotkey: ' + str(keys)) elif t == 'consumer': cc = consumer_code_for(cfg.get('action', '')) if cc is not None: consumer.send(cc) else: print('WARNING: unknown consumer action: ' + str(cfg.get('action'))) elif t == 'type': text = cfg.get('text', '') if text: layout.write(text) elif t == 'launch': if platform == 'mac': keyboard.send(adafruit_hid.keycode.Keycode.LEFT_GUI, adafruit_hid.keycode.Keycode.SPACE) else: keyboard.send(adafruit_hid.keycode.Keycode.LEFT_GUI, adafruit_hid.keycode.Keycode.R) time.sleep(0.4) layout.write(cfg.get('program', '')) time.sleep(0.1) keyboard.send(adafruit_hid.keycode.Keycode.ENTER) elif t == 'config_toggle': config_slot = 1 - config_slot dbg('Config slot -> ' + str(config_slot + 1)) update_displays() elif t == 'mode_toggle': modes = CONFIG.get('dial_modes', []) if modes: current_mode_index = (current_mode_index + 1) % len(modes) dbg('Encoder mode -> ' + modes[current_mode_index].get('name', '?')) update_displays() elif t == 'mouse_scroll': mouse.move(wheel=cfg.get('direction', 1)) # --------------------------------------------------------------------------- # Buttons # --------------------------------------------------------------------------- class Button: def __init__(self, cfg, cfg2, pin_obj): self.cfg = cfg self.cfg2 = cfg2 self.pin = digitalio.DigitalInOut(pin_obj) self.pin.direction = digitalio.Direction.INPUT self.pin.pull = digitalio.Pull.UP self._pressed = False def update(self): pressed = not self.pin.value # active low with pull-up if pressed and not self._pressed: active = self.cfg2 if (config_slot == 1 and self.cfg2) else self.cfg execute_action(active) update_displays(active.get('label', '')) self._pressed = pressed buttons = [] dbg('--- Setting up buttons ---') for idx, btn_cfg in CONFIG.get('buttons', {}).items(): pin_name = btn_cfg.get('gpio') dbg('Button ' + str(idx) + ': gpio=' + str(pin_name) + ' label=' + str(btn_cfg.get('label', '?'))) pin_obj = get_pin(pin_name) if pin_obj is None: print('Button ' + str(idx) + ' SKIPPED -- pin "' + str(pin_name) + '" not found') continue # Build Config 2 action dict if enabled cfg2 = None if btn_cfg.get('has_config2'): a2 = btn_cfg.get('action_type2', 'hotkey') cfg2 = {'type': a2, 'label': btn_cfg.get('label', '')} if a2 == 'hotkey': cfg2['keys'] = [k for k in [ btn_cfg.get('key1_2', ''), btn_cfg.get('key2_2', ''), btn_cfg.get('key3_2', '')] if k] cfg2['auto_translate'] = btn_cfg.get('auto_translate', False) elif a2 == 'actions': cfg2['type'] = 'consumer' cfg2['action'] = btn_cfg.get('consumer_action2', '') elif a2 == 'launch': cfg2['program'] = btn_cfg.get('program2', '') elif a2 == 'type': cfg2['text'] = btn_cfg.get('type_text2', '') buttons.append(Button(btn_cfg, cfg2, pin_obj)) print('Button ' + str(idx) + ' ready: "' + str(btn_cfg.get('label', '?')) + '" on ' + str(pin_name)) dbg(str(len(buttons)) + ' of ' + str(len(CONFIG.get('buttons', {}))) + ' buttons initialised') # --------------------------------------------------------------------------- # Encoders # --------------------------------------------------------------------------- class Encoder: def __init__(self, mode_cfg, clk_obj, dt_obj, sw_obj): self.mode_cfg = mode_cfg self.enc = rotaryio.IncrementalEncoder(clk_obj, dt_obj) self._last = self.enc.position if sw_obj: self.sw = digitalio.DigitalInOut(sw_obj) self.sw.direction = digitalio.Direction.INPUT self.sw.pull = digitalio.Pull.UP self._sw_pressed = False else: self.sw = None def update(self): pos = self.enc.position delta = pos - self._last self._last = pos if delta > 0: execute_action(self.mode_cfg.get('cw', {})) elif delta < 0: execute_action(self.mode_cfg.get('ccw', {})) if self.sw: pressed = not self.sw.value if pressed and not self._sw_pressed: execute_action(self.mode_cfg.get('press')) self._sw_pressed = pressed encoders = [] for enc_cfg in CONFIG.get('dial_modes', []): clk = get_pin(enc_cfg.get('gpio_clk')) dt = get_pin(enc_cfg.get('gpio_dt')) sw = get_pin(enc_cfg.get('gpio_sw')) if clk is None or dt is None: print('Encoder skipped: missing CLK or DT pins') continue encoders.append(Encoder(enc_cfg, clk, dt, sw)) dbg('Encoder ready: ' + enc_cfg.get('name', '?')) # --------------------------------------------------------------------------- # Sliders # --------------------------------------------------------------------------- class Slider: SMOOTHING = 8 THRESHOLD = 400 def __init__(self, cfg, adc_obj): self.cfg = cfg self.adc = analogio.AnalogIn(adc_obj) self._buf = [self.adc.value] * self.SMOOTHING self._idx = 0 self._last = self._read() self.inverted = cfg.get('inverted', False) self.function = cfg.get('function', 'volume') def _read(self): self._buf[self._idx] = self.adc.value self._idx = (self._idx + 1) % self.SMOOTHING avg = sum(self._buf) // self.SMOOTHING return 65535 - avg if self.inverted else avg def update(self): val = self._read() delta = val - self._last if abs(delta) < self.THRESHOLD: return self._last = val direction = 1 if delta > 0 else -1 if self.function == 'volume': cc = consumer_code_for( 'VOLUME_INCREMENT' if direction > 0 else 'VOLUME_DECREMENT') if cc: consumer.send(cc) elif self.function == 'scroll_speed': mouse.move(wheel=direction) elif self.function == 'zoom_speed': kc = adafruit_hid.keycode.Keycode mod = kc.LEFT_GUI if platform == 'mac' else kc.LEFT_CONTROL keyboard.send(mod, kc.EQUALS if direction > 0 else kc.MINUS) elif self.function == 'brightness': cc = consumer_code_for( 'BRIGHTNESS_INCREMENT' if direction > 0 else 'BRIGHTNESS_DECREMENT') if cc: consumer.send(cc) sliders = [] for sl_cfg in CONFIG.get('sliders', []): pin = get_pin(sl_cfg.get('gpio_out')) if pin is None: print('Slider skipped: no pin') continue sliders.append(Slider(sl_cfg, pin)) dbg('Slider ready: ' + sl_cfg.get('label', '?')) # --------------------------------------------------------------------------- # Main loop # --------------------------------------------------------------------------- print('MacroPad running.') print('Device: ' + DEVICE) print('Buttons: ' + str(len(buttons)) + ' Encoders: ' + str(len(encoders)) + ' Sliders: ' + str(len(sliders))) while True: for btn in buttons: btn.update() for enc in encoders: enc.update() for sl in sliders: sl.update() time.sleep(0.008)