push-button-light-control
Advanced tools
A high-level Python API for controlling Push Button Light controller devices with PIC24FV16KM202 microcontroller using custom UART protocol. This library provides an intuitive interface for LED color and luminosity control in industrial and automation applications.
🎨 Intuitive Color Control - Set LED colors using named presets or custom RGB values
💡 Luminosity Management - Control brightness with presets and smooth fading
🔄 Multiple Control Modes - Support for UART, Switch, Analog, and PWM modes
📡 Multi-Device Support - Control individual devices or broadcast to all
🔒 Thread-Safe - Safe for use in GUI applications and multi-threaded environments
⚡ Event-Driven - Callback system for asynchronous responses
🛡️ Robust Error Handling - Comprehensive error reporting and recovery
$ pip install push-button-light-control
https://pypi.org/project/push-button-light-control/#push_button_light_control-1.1.3.tar.gz
Extract push_button_light_control-1.1.3.tar.gz
$ cd push_button_light_control-1.1.3
$ pip install -e .
This example provides a complete demonstration of how to connect, control, and test your Push Button Light device using the PushButtonLightControl API. It covers connection setup, control mode configuration, LED color sequencing, brightness adjustment, and built-in luminosity presets.
from pb_api import PushButtonLightControl
pb = PushButtonLightControl('COM3') # Replace with your COM port
pb.connect()
device_ID = 1
pb.color.set_all_leds_color(device_ID, 'WHITE')
pb.luminosity.set_all_luminosity(device_ID, 50)
pb.disconnect()
#!/usr/bin/env python3
"""
Basic usage example for Push Button Light Control API
Fixed connection and error handling
"""
import time
import sys
import os
# Add parent directory to path for local development
sys.path.insert(0, os.path.dirname(os.path.dirname(os.path.abspath(__file__))))
from pb_api import PushButtonLightControl, CTRL_UART, CTRL_SW_LUMIN, LED_UR, LED_UL, LED_LR, LED_LL
def main():
print("Starting Push Button Light Control Demo")
print("=" * 40)
# Initialize API with longer timeout
pb = PushButtonLightControl('COM6', timeout=3.0) # Change port as needed
try:
# Connect to device
print("1. Connecting to device...")
if pb.connect():
print("✓ Connected successfully!")
else:
print("✗ Connection failed, but continuing anyway...")
# Don't return - try to continue
# Small delay after connection
time.sleep(1.0)
# Set to UART control mode
print("\n2. Setting UART control mode...")
try:
success = pb.control_mode.set_control_mode(1, CTRL_UART)
time.sleep(0.3)
if success:
print("✓ Control mode set successfully")
else:
print("⚠ Control mode setting may have failed, continuing...")
except Exception as e:
print(f"⚠ Control mode error: {e}, continuing...")
pb.color.set_all_leds_color(1, 'OFF')
time.sleep(0.3)
pb.luminosity.set_all_luminosity(1, 0)
time.sleep(1.0)
# Set LED colors
print("\n3. Setting LED colors...")
try:
pb.luminosity.set_all_luminosity(1, 100)
time.sleep(0.3)
pb.color.set_led_color(1, LED_UR, 'GREEN')
print("✓ UR LED set to GREEN")
time.sleep(0.2)
pb.color.set_led_color(1, LED_UL, 'ORANGE')
print("✓ UL LED set to ORANGE")
time.sleep(0.2)
pb.color.set_led_color(1, LED_LL, 'RED')
print("✓ LL LED set to RED")
time.sleep(0.2)
pb.color.set_led_color(1, LED_LR, 'MAGENTA')
print("✓ LR LED set to MAGENTA")
time.sleep(0.2)
pb.color.set_led_color(1, LED_UR, 'GREEN')
print("✓ UR LED set to GREEN")
time.sleep(0.2)
pb.color.set_led_color(1, LED_UL, 'ORANGE')
print("✓ UL LED set to ORANGE")
time.sleep(0.2)
pb.color.set_led_color(1, LED_LL, 'RED')
print("✓ LL LED set to RED")
time.sleep(0.2)
pb.color.set_led_color(1, LED_LR, 'MAGENTA')
print("✓ LR LED set to MAGENTA")
time.sleep(0.2)
print("\nSetting LED luminosity...")
# Set all LEDs to same color and brightness
pb.color.set_all_leds_color(1, 'BLUE')
time.sleep(0.2)
pb.color.set_all_leds_color(1, 'RED')
time.sleep(0.2)
pb.color.set_all_leds_color(1, 'GREEN')
time.sleep(0.2)
except Exception as e:
print(f"⚠ Color setting error: {e}")
# Set luminosity
print("\n4. Setting luminosity to MAX...")
try:
pb.color.set_all_leds_color(1, 'WHITE')
time.sleep(0.2)
pb.luminosity.set_all_luminosity(1, 100)
print("✓ Luminosity set to 100%")
time.sleep(0.2)
except Exception as e:
print(f"⚠ Luminosity error: {e}")
# Test presets
print("\n5. Testing presets...")
presets = ["DAY", "NIGHT", "OFF"]
for preset in presets:
try:
pb.luminosity.set_luminosity_preset(1, preset)
print(f"✓ Preset {preset} set")
time.sleep(0.5)
except Exception as e:
print(f"⚠ Preset {preset} error: {e}")
print("\n" + "=" * 40)
print("Demo completed!")
except Exception as e:
print(f"\n💥 Demo failed with exception: {e}")
import traceback
traceback.print_exc()
finally:
pb.disconnect()
print("Disconnected from device")
if __name__ == "__main__":
main()
After installation:
$ python -m pb_api.examples.quick_start
The following table describes the key variables, constants, and methods used in the example:
| Element | Description |
|---|---|
PushButtonLightControl | Main API class for connecting and communicating with the Push Button Light device. |
'COM6' | Serial port name. Replace with your actual port (e.g. 'COM3' on Windows or '/dev/ttyUSB0' on Linux). |
timeout=3.0 | Response timeout for device communication (in seconds). |
CTRL_UART | Control mode constant for UART (software-controlled) operation. |
LED_UR, LED_UL, LED_LR, LED_LL | LED position constants: Upper Right, Upper Left, Lower Right, Lower Left. |
pb.connect(com_port, baudrate) | Opens a serial connection to the device. Returns True on success. |
pb.control_mode.set_control_mode(device_id, CTRL_UART) | Sets device ID 1 to UART control mode. |
pb.color.set_led_color(device_id, led_name, led_color) | Sets individual LED color by device ID, LED position, and color name. |
pb.color.set_all_leds_color(device_id, led_color) | Sets all LEDs on a device (or all devices) to the same color. |
pb.luminosity.set_all_luminosity(device_id, lumin_val) | Adjusts brightness (0–100%) for all LEDs. |
pb.luminosity.set_luminosity_preset(device_id, lumin_preset) | Applies a predefined brightness preset: "DAY", "NIGHT", "OFF", or "MAX". |
register_callback(event, callback) | Registers a callback function to handle specific events such as responses or errors. |
"OFF", "RED", "GREEN", "BLUE", "WHITE", "ORANGE", "MAGENTA", "CYAN"
"OFF" # 0%
"NIGHT" # 20% (e.g., 20fL)
"DAY" # 50% (e.g., 150fL)
"MAX" # 100%
from pb_api import PushButtonLightControl
pb = PushButtonLightControl('COM3')
pb.connect()
pb = PushButtonLightControl('COM3', timeout=2.0)
pb.connect()
if pb.is_connected():
print("Device connected")
from pb_api import CTRL_UART, CTRL_SW_LUMIN, CTRL_SW_AN0, CTRL_SW_PWM
pb.control_mode.set_control_mode(1, CTRL_UART)
pb.control_mode.set_control_mode(1, CTRL_SW_LUMIN)
pb.control_mode.set_control_mode(1, CTRL_SW_AN0)
pb.control_mode.set_control_mode(1, CTRL_SW_PWM)
pb.color.set_led_color(1, 0, 'RED') # UR LED - Red
pb.color.set_led_color(1, 1, 'GREEN') # UL LED - Green
pb.color.set_led_color(1, 2, 'BLUE') # LR LED - Blue
pb.color.set_led_color(1, 3, 'WHITE') # LL LED - White
pb.color.set_all_leds_color(1, 'WHITE')
pb.color.set_all_leds_color(0, 'BLUE') # 0 = broadcast ID
pb.color.set_custom_rgb_color(1, 0, red=100, green=50, blue=25) # UR LED
pb.luminosity.set_led_luminosity(1, 0, 100) # UR LED - 100%
pb.luminosity.set_led_luminosity(1, 1, 75) # UL LED - 75%
pb.luminosity.set_led_luminosity(1, 2, 50) # LR LED - 50%
pb.luminosity.set_led_luminosity(1, 3, 25) # LL LED - 25%
pb.luminosity.set_all_luminosity(1, 80) # All LEDs at 80%
pb.luminosity.set_all_luminosity(1, 0)
pb.luminosity.set_luminosity_preset(1, "NIGHT") # 20% brightness
pb.luminosity.set_luminosity_preset(1, "DAY") # 50% brightness
pb.luminosity.set_luminosity_preset(1, "MAX") # 100% brightness
pb.luminosity.set_luminosity_preset(1, "OFF") # 0% brightness
pb.luminosity.fade_luminosity(1, 0, 100, steps=20, delay=0.05)
pb.system_config.set_luminosity_percentages(
device_id=1,
max_percent=100, # Maximum brightness
day_percent=50, # Daytime brightness
night_percent=20 # Nighttime brightness
)
pb.system_config.set_luminosity_presets(1, 4095, 2047, 819)
def response_handler(data):
"""Handle device responses"""
print(f"Device response: {data}")
def error_handler(data):
"""Handle errors"""
print(f"Error occurred: {data}")
def connection_handler():
"""Handle connection events"""
print("Device connected")
pb.register_callback('response_received', response_handler)
pb.register_callback('error', error_handler)
pb.register_callback('connected', connection_handler)
pb.color.set_led_color(1, 0, 'RED') # Device 1
pb.color.set_led_color(2, 0, 'GREEN') # Device 2
pb.color.set_led_color(3, 0, 'BLUE') # Device 3
pb.color.set_all_leds_color(0, 'WHITE')
pb.luminosity.set_all_luminosity(0, 50)
from pb_api import LED_UR, LED_UL, LED_LR, LED_LL
pb.color.set_led_color(1, LED_UR, 'RED') # Upper Right
pb.color.set_led_color(1, LED_UL, 'GREEN') # Upper Left
pb.color.set_led_color(1, LED_LR, 'BLUE') # Lower Right
pb.color.set_led_color(1, LED_LL, 'WHITE') # Lower Left
from pb_api import PushButtonError, CommunicationError, TimeoutError, DeviceError
try:
pb.connect()
pb.color.set_led_color(1, 0, 'RED')
except CommunicationError as e:
print(f"Connection failed: {e}")
except TimeoutError as e:
print(f"Device timeout: {e}")
except DeviceError as e:
print(f"Device error (Code: 0x{e.error_code:02x}): {e}")
except PushButtonError as e:
print(f"API error: {e}")
Device not found
Check COM port name
Verify device is connected and powered
Ensure no other application is using the port
Connection timeout
Check baudrate matches device configuration (usually 115200)
Verify cable connection
Check device power
Command not working
Ensure device is in UART mode
Check device ID is correct
Verify command parameters are within valid ranges
Enable debug output by setting environment variable:
export PB_API_DEBUG=1
This project is licensed under the Public Domain MIT License - see the LICENSE file for details.
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