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hue.py
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hue.py
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# Philips Hue Bluetooth example app
# Requirements:
# - Win/Linux/MacOS with Bluetooth LE
# - Paired Philips Hue Light (to make light visible, go to
# Hue app > Settings > Voice Assistants > Google Home > Make Visible)
# - Python library: bleak
# pip install bleak>=0.19.5
# Name: bleak
# Version: 0.19.5
# Summary: Bluetooth Low Energy platform Agnostic Klient
# Home-page: https://github.com/hbldh/bleak
from bleak import BleakClient
from bleak import BleakScanner
import asyncio
import struct
import uuid
class PhilipsHueScanner(BleakScanner):
SERVICE_UUID = '0000fe0f-0000-1000-8000-00805f9b34fb'
def __init__(self):
super().__init__(service_uuids=[PhilipsHueScanner.SERVICE_UUID])
class PhilipsHueClient(BleakClient):
def _command(code):
return uuid.UUID('932c32bd-'+ str(code).zfill(4) + '-47a2-835a-a8d455b859dd')
def __init__(self, ble_address):
super().__init__(ble_address)
async def get_power(self):
"""
Gets power state (True == on, False == off)
"""
resp = await self.read_gatt_char(PhilipsHueClient._command(2))
return bool(resp == b'\x01')
async def set_power(self, enabled):
"""
Sets power state (True == on, False == off)
"""
data = b'\x01' if enabled else b'\x00'
return await self.write_gatt_char(PhilipsHueClient._command(2), data, response=True)
async def get_brightness(self):
"""
Gets brightness in range (0.0 - 1.0]
"""
resp = await self.read_gatt_char(PhilipsHueClient._command(3))
return struct.unpack("B", resp)[0] / 254
async def set_brightness(self, ratio):
"""
Sets brightness in range (0.0 - 1.0]
"""
data = struct.pack("B", max(1, min(int(round(ratio * 254)), 254)))
return await self.write_gatt_char(PhilipsHueClient._command(3), data, response=True)
async def get_temperature_k(self):
"""
Gets color temperature in kelvin
"""
resp = await self.read_gatt_char(PhilipsHueClient._command(4))
colortemp_mireds = struct.unpack("h", resp)[0]
if colortemp_mireds == -1:
return None
return int(round(1e6 / colortemp_mireds))
async def set_temperature_k(self, temperature_k):
"""
Sets color temperature in kelvin
"""
colortemp_mireds = int(round(1e6 / temperature_k))
data = struct.pack("h", max(153, min(colortemp_mireds, 500)))
return await self.write_gatt_char(PhilipsHueClient._command(4), data, response=True)
async def get_xy(self):
"""
Gets color (XY in CIE 1931 colorspace)
:return: XY coordinate
:rtype: Tuple[float,float]
"""
scale = 1 / 2**16
resp = await self.read_gatt_char(PhilipsHueClient._command(5))
x, y = [x * scale for x in struct.unpack('HH', resp)]
return (x, y)
#Color (XY in CIE 1931 colorspace)
async def set_xy(self, x, y):
"""
Sets color (XY in CIE 1931 colorspace)
:param xy: XY coordinate
:type xy: Tuple[float,float]
"""
x = min(1, max(0, x))
y = min(1, max(0, y))
xysum = x + y
if xysum > 1:
x = x / xysum
y = y / xysum
# TODO: Check CIE 1931 range to avoid out of range error
scale = 2**16
data = struct.pack('HH', *[int(round(scale * val)) for val in (x, y)])
return await self.write_gatt_char(PhilipsHueClient._command(5), data, response=True)
####
# ChatGPT: Function to convert from RGB to CIE 1931 + Brightness and vice versa.
def rgb_to_cie(r, g, b):
# Apply a gamma correction
r = pow((r + 0.055) / (1.0 + 0.055), 2.4) if (r > 0.04045) else (r / 12.92)
g = pow((g + 0.055) / (1.0 + 0.055), 2.4) if (g > 0.04045) else (g / 12.92)
b = pow((b + 0.055) / (1.0 + 0.055), 2.4) if (b > 0.04045) else (b / 12.92)
# Convert to XYZ color space
X = r * 0.4124 + g * 0.3576 + b * 0.1805
Y = r * 0.2126 + g * 0.7152 + b * 0.0722
Z = r * 0.0193 + g * 0.1192 + b * 0.9505
# Convert to CIE 1931 color space
x = X / (X + Y + Z)
y = Y / (X + Y + Z)
brightness = Y
return (x, y, brightness)
def cie_to_rgb(x, y, brightness):
# Convert back to XYZ color space
Y = brightness
X = (Y / y) * x
Z = (Y / y) * (1 - x - y)
# Convert to RGB color space
r = X * 3.2406 + Y * -1.5372 + Z * -0.4986
g = X * -0.9689 + Y * 1.8758 + Z * 0.0415
b = X * 0.0557 + Y * -0.2040 + Z * 1.0570
# Apply inverse gamma correction
r = (1.055 * pow(r, (1 / 2.4)) - 0.055) if (r > 0.0031308) else (12.92 * r)
g = (1.055 * pow(g, (1 / 2.4)) - 0.055) if (g > 0.0031308) else (12.92 * g)
b = (1.055 * pow(b, (1 / 2.4)) - 0.055) if (b > 0.0031308) else (12.92 * b)
return (r, g, b)
####
async def main(address = None):
if address is None:
print("BLE Scanning...")
print()
hue_devices = await PhilipsHueScanner.discover()
hue_devices = sorted(hue_devices, key=lambda d: d.rssi, reverse=True)
device = hue_devices[0]
address = device.address
print(f"BLE Device: {device.name}")
print(f"BLE rssi: {device.rssi}")
print()
print(f"BLE Address: {address}")
async with PhilipsHueClient(address) as hue:
print(f"BLE connected: {hue.is_connected}")
print()
if True:
while True:
print(f"power: {await hue.get_power()}")
print(f"brightness: {await hue.get_brightness()}")
print(f"temperature_k: {await hue.get_temperature_k()}")
print(f"get_xy: {await hue.get_xy()}") # TODO: convert xy/temperature + brightness to rgb/hsb/hsv and vice versa
print()
await asyncio.sleep(0.5)
if False:
while True:
await hue.set_power(not await hue.get_power())
await asyncio.sleep(0.5)
if False:
import time, math
while True:
await hue.set_brightness(0.5 * (1 + math.sin(time.time() * 4)))
await asyncio.sleep(0.1)
if False:
import random
while True:
r,g,b = random.random(), random.random(), random.random()
x,y,bri = rgb_to_cie(r, g, b)
# override brightness
bri = max(r, max(g, b))
await hue.set_xy(x, y)
await hue.set_brightness(bri)
await asyncio.sleep(0.1)
if __name__ == "__main__":
import argparse
parser = argparse.ArgumentParser(
description="Philips Hue White And Color Ambiance A67 - Example BLE App",
epilog="* Pair Philips Hue in advance! "
"(Hue App > Settings > Voice Assistants > Google Home > Make Visible, then pair on PC)"
)
parser.add_argument("address", type=str, default=None, nargs="?")
args = parser.parse_args()
asyncio.run(main(args.address))