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merged 2 commits into from
May 28, 2025
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websocket server example #2

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341a4de
websocket server example
FoamyGuy May 28, 2025
1f303ec
remove debugging prints
FoamyGuy May 28, 2025
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3 changes: 3 additions & 0 deletions LICENSES/LicenseRef-Wikipedia-Public-Domain.txt
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@@ -0,0 +1,3 @@
I, the copyright holder of this work, release this work into the public domain. This applies worldwide.
In some countries this may not be legally possible; if so:
I grant anyone the right to use this work for any purpose, without any conditions, unless such conditions are required by law.
3 changes: 0 additions & 3 deletions adafruit_opt4048.py
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Expand Up @@ -323,7 +323,6 @@ def __init__(self, i2c_bus, address=_OPT4048_DEFAULT_ADDR):
def init(self):
"""Initialize the sensor and verify the device ID"""
# Check device ID
print(f"id: {hex(self._device_id)}")
if self._device_id != _OPT4048_CHIP_ID:
raise RuntimeError("Failed to find an OPT4048 sensor - check your wiring!")

Expand Down Expand Up @@ -593,7 +592,6 @@ def threshold_low(self):
# Read the exponent and mantissa from the threshold low register
exponent = self._threshold_low_exponent
mantissa = self._threshold_low_mantissa
print(f"exponent: {exponent} mantissa: {mantissa}")
# Calculate ADC code value by applying the exponent as a bit shift
# ADD 8 to the exponent as per datasheet equations 12-13
return mantissa << (8 + exponent)
Expand Down Expand Up @@ -697,7 +695,6 @@ def all_channels(self):

# Combine MSB and LSB to form the 20-bit mantissa
mant = (msb << 8) | lsb
# print(f"ch: {ch} exp: {exp} msb: {msb} lsb: {lsb} counter: {counter} crc: {crc} mant: {mant}") # noqa: E501
# Calculate CRC
# Initialize CRC variables
x0 = 0 # CRC bit 0
Expand Down
79 changes: 79 additions & 0 deletions examples/opt4048_websocket.py
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# SPDX-FileCopyrightText: Copyright (c) 2025 Tim C for Adafruit Industries
# SPDX-License-Identifier: MIT

from asyncio import create_task, gather, run
from asyncio import sleep as async_sleep

import board
import socketpool
import wifi
from adafruit_httpserver import GET, FileResponse, Request, Response, Server, Websocket

from adafruit_opt4048 import OPT4048, ConversionTime, Mode, Range

pool = socketpool.SocketPool(wifi.radio)
server = Server(pool, debug=True, root_path="opt4048_ws_static")

websocket: Websocket = None

READ_INTERVAL = 0.1 # seconds

i2c = board.I2C() # uses board.SCL and board.SDA
# i2c = board.STEMMA_I2C() # For using the built-in STEMMA QT connector on a microcontroller
sensor = OPT4048(i2c)

sensor.range = Range.AUTO
sensor.conversion_time = ConversionTime.TIME_100MS
sensor.mode = Mode.CONTINUOUS


@server.route("/connect-websocket", GET)
def connect_client(request: Request):
global websocket # noqa: PLW0603, global use

if websocket is not None:
websocket.close() # Close any existing connection

websocket = Websocket(request)

return websocket


server.start(str(wifi.radio.ipv4_address))


async def handle_http_requests():
while True:
server.poll()

await async_sleep(0)


async def send_color_data_ws():
while True:
if websocket is not None:
try:
x, y, lux = sensor.cie
out_msg = "---CIE Data---\n"
out_msg += f"CIE x: {x}\n"
out_msg += f"CIE y: {y}\n"
out_msg += f"Lux: {lux}\n"
out_msg += f"Color Temperature: {sensor.calculate_color_temperature(x, y)} K\n"
out_msg += "-------------\n"

websocket.send_message(out_msg, fail_silently=True)
except RuntimeError:
# error reading sensor
pass

await async_sleep(READ_INTERVAL)


async def main():
await gather(
create_task(handle_http_requests()),
create_task(send_color_data_ws()),
)


run(main())
3 changes: 3 additions & 0 deletions examples/opt4048_ws_static/cie1931_diagram.svg
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2 changes: 2 additions & 0 deletions examples/opt4048_ws_static/cie1931_diagram.svg.license
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// SPDX-FileCopyrightText: Copyright (c) 2009 BenRG
// SPDX-License-Identifier: LicenseRef-Wikipedia-Public-Domain
202 changes: 202 additions & 0 deletions examples/opt4048_ws_static/index.html
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<!--
SPDX-FileCopyrightText: Copyright (c) 2025 Tim C for Adafruit Industries
SPDX-License-Identifier: MIT
-->
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>OPT4048 CIE Color Plotter</title>
<style>
body {
font-family: Arial, sans-serif;
max-width: 100%;
margin: 0 auto;
padding: 8px;
height: 100vh;
display: flex;
flex-direction: column;
}
.container {
display: flex;
flex-wrap: wrap;
gap: 10px;
justify-content: center;
flex: 1;
}
.controls {
flex: 1;
min-width: 230px;
max-width: 100%;
display: flex;
flex-direction: column;
overflow: hidden;
}
.visualization {
flex: 2;
min-width: 280px;
max-width: 100%;
display: flex;
flex-direction: column;
}
#cie-diagram {
position: relative;
width: 100%;
max-width: 450px;
margin: 0 auto 10px auto;
flex: 1;
display: flex;
align-items: center;
justify-content: center;
}
#cie-diagram img {
width: 100%;
max-height: 100%;
object-fit: contain;
display: block;
}
#data-point {
position: absolute;
width: 16px;
height: 16px;
background-color: white;
border-radius: 50%;
border: 3px solid black;
transform: translate(-50%, -50%);
pointer-events: none;
box-shadow: 0 0 8px rgba(0, 0, 0, 0.9);
z-index: 10;
}
#color-sample {
width: 30px;
height: 30px;
border: 1px solid #ccc;
margin: 0 auto;
border-radius: 50%;
}
#serial-log {
flex: 1;
min-height: 80px;
max-height: 150px;
overflow-y: auto;
background-color: #f5f5f5;
padding: 8px;
border: 1px solid #ddd;
font-family: monospace;
font-size: 12px;
margin-bottom: 5px;
}
button {
padding: 8px 12px;
margin: 4px 4px 4px 0;
background-color: #4CAF50;
color: white;
border: none;
border-radius: 4px;
cursor: pointer;
font-size: 14px;
}
button:hover {
background-color: #45a049;
}
button:disabled {
background-color: #cccccc;
cursor: not-allowed;
}
.data-display {
display: flex;
flex-wrap: wrap;
justify-content: center;
gap: 8px;
margin-top: 10px;
}
.data-box {
flex: 1;
min-width: 100px;
margin: 0;
padding: 10px;
background-color: #f9f9f9;
border: 1px solid #ddd;
border-radius: 4px;
text-align: center;
}
.data-box h3 {
margin: 0 0 5px 0;
font-size: 14px;
}
.data-value {
font-size: 18px;
font-weight: bold;
}

/* Responsive adjustments for very small screens */
@media (max-height: 600px) {
h1 { font-size: 20px !important; margin: 5px 0 !important; }
h2 { font-size: 16px; margin: 8px 0 5px 0; }
p { font-size: 12px !important; margin: 5px 0 !important; }
.data-box { padding: 5px; }
.data-box h3 { font-size: 12px; margin: 0 0 3px 0; }
.data-value { font-size: 14px; }
#serial-log { min-height: 60px; max-height: 100px; }
button { padding: 6px 10px; font-size: 12px; }
}
</style>
</head>
<body>


<div class="container">
<div class="controls">
<h2 style="margin: 10px 0; font-size: 24px;">OPT4048 CIE Color Plotter</h2>
<p style="margin: 8px 0; font-size: 14px;">Connect your Arduino with OPT4048 sensor to visualize color measurements on a CIE diagram.</p>

<button id="clear-button">Clear Log</button>
<button id="test-plot-button" style="display: none;">Test Plot Point</button>

<h2>Connection Status</h2>
<p id="status">Not connected</p>

<h2 style="margin-bottom: 5px;">Serial Monitor</h2>
<div id="serial-log"></div>
</div>

<div class="visualization">
<h2 style="margin: 10px 0; font-size: 24px;">CIE 1931 Chromaticity Diagram</h2>
<div id="cie-diagram">
<img src="cie1931_diagram.svg" alt="CIE 1931 Chromaticity Diagram">
<div id="data-point" style="display: none;"></div>
<!-- Debug info: will show exact location of measured color -->
<div id="debug-coordinates" style="position: absolute; bottom: 3px; right: 3px; font-size: 10px; background: rgba(255,255,255,0.7); padding: 2px; border: 1px solid #ccc; display: block;"></div>
</div>

<div class="data-display">
<div class="data-box">
<h3>CIE x</h3>
<div id="cie-x" class="data-value">-</div>
</div>
<div class="data-box">
<h3>CIE y</h3>
<div id="cie-y" class="data-value">-</div>
</div>
<div class="data-box">
<h3>Lux</h3>
<div id="lux" class="data-value">-</div>
</div>
<div class="data-box">
<h3>CCT (K)</h3>
<div id="cct" class="data-value">-</div>
</div>
</div>

<div class="data-box">
<h3>Color Approximation</h3>
<div id="color-sample"></div>
<small>(Note: This is a rough approximation)</small>
</div>
</div>
</div>

<script src="script.js"></script>
</body>
</html>
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