[Let'sDo第3期] DIY一个电子测光表 3 过程贴(wifi联网)
一、联网状态测试:
import board
import wifi
import displayio
from adafruit_bitmap_font import bitmap_font
from adafruit_display_text import label
from digitalio import DigitalInOut, Direction, Pull
import time
# WiFi network information
ssid = 'xiaogui'
password = '88888888'
# Load font
font = bitmap_font.load_font("LeagueSpartan-Bold-16.bdf")
color_FireBrick = 0xB22222 # 耐火砖红
# Initialize display parameters
display = board.DISPLAY
display.brightness = 0.75 # Change brightness
display.rotation = 0 # Change orientation, 0 for landscape, 90 for portrait
# Button control
button = DigitalInOut(board.D1)
button.direction = Direction.INPUT
button.pull = Pull.UP
# Create a group to hold the text elements
text_group = displayio.Group()
# Function to display IP address on the screen
def display_ip_address(ip_address):
# Remove existing text if any
for i in reversed(range(len(text_group))):
displayio.remove(text_group[i])
# Create a new label for the IP address
ip_text = label.Label(
font=font,
text=f"\n IP: {ip_address}",
x=2,
y=2,
color=color_FireBrick,
)
text_group.append(ip_text)
# Connect to WiFi
print("Connecting to WiFi...")
wifi.radio.connect(ssid, password)
# Wait for the connection to be established
max_attempts = 10
attempt = 0
while not wifi.radio.ipv4_address and attempt < max_attempts:
print("Waiting for connection...")
time.sleep(1)
attempt += 1
if wifi.radio.ipv4_address:
print("Connected to WiFi")
print(f"IP address: {wifi.radio.ipv4_address}")
display_ip_address(wifi.radio.ipv4_address) # Display IP address on the screen
else:
print("Failed to connect to WiFi")
# Set the text group as the root group to display the text
display.root_group = text_group
（观看视频点击图片）
联网控制测试:
1.控制端(html):
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>ESP32 LED Control</title>
<style>
body {
font-family: system-ui, -apple-system, sans-serif;
margin: 0;
min-height: 100vh;
display: flex;
justify-content: center;
align-items: center;
background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
}
.container {
background: rgba(255, 255, 255, 0.9);
padding: 2rem;
border-radius: 1rem;
box-shadow: 0 8px 32px rgba(31, 38, 135, 0.1);
text-align: center;
min-width: 300px;
}
h1 {
color: #2d3748;
margin-bottom: 2rem;
}
.led-display {
margin: 2rem 0;
}
.led-indicator {
width: 50px;
height: 50px;
border-radius: 50%;
margin: 0 auto 1rem;
background: #cbd5e0;
transition: all 0.3s ease;
}
.led-indicator.on {
background: #48bb78;
box-shadow: 0 0 20px #48bb78;
}
.button-container {
display: flex;
gap: 1rem;
justify-content: center;
margin: 2rem 0;
}
.control-button {
background: #4299e1;
color: white;
border: none;
padding: 1rem 2rem;
border-radius: 0.5rem;
font-size: 1rem;
cursor: pointer;
transition: all 0.3s ease;
}
.control-button:hover {
background: #3182ce;
transform: translateY(-2px);
}
.control-button:active {
transform: translateY(0);
}
.response {
margin-top: 1rem;
padding: 1rem;
border-radius: 0.5rem;
background: rgba(0, 0, 0, 0.05);
font-family: monospace;
color: #2d3748;
}
.error {
color: #e53e3e;
}
</style>
</head>
<body>
<div>
<h1>ESP32 LED Control</h1>
<div>
<div id="led-indicator"></div>
<div id="status-text">LED Status: Unknown</div>
</div>
<div>
<button onclick="sendCommand('on')">Turn On</button>
<button onclick="sendCommand('off')">Turn Off</button>
</div>
<div id="response"></div>
</div>
<script>
const ESP32_IP = '192.168.113.212';
const ledIndicator = document.getElementById('led-indicator');
const statusText = document.getElementById('status-text');
const response = document.getElementById('response');
async function sendCommand(action) {
try {
const res = await fetch(`http://${ESP32_IP}/${action}`);
const text = await res.text();
response.textContent = text;
response.classList.remove('error');
ledIndicator.classList.toggle('on', action === 'on');
statusText.textContent = `LED Status: ${action === 'on' ? 'On' : 'Off'}`;
} catch (error) {
response.textContent = `Error: Failed to communicate with ESP32 (${error.message})`;
response.classList.add('error');
}
}
</script>
</body>
</html>2.接收端(cpy):
import board
import digitalio
import wifi
import socketpool
import time
# WiFi credentials
SSID = 'xiaogui'
PASSWORD = '88888888'
# LED setup
led = digitalio.DigitalInOut(board.LED)
led.direction = digitalio.Direction.OUTPUT
# Constants
BUFFER_SIZE = 512
MAX_RETRIES = 3
RETRY_DELAY = 0.1
print("Connecting to WiFi...")
wifi.radio.connect(SSID, PASSWORD)
print("Connected to WiFi")
print("IP Address:", wifi.radio.ipv4_address)
pool = socketpool.SocketPool(wifi.radio)
def handle_client_connection(conn, addr):
"""Handle a single client connection with retries"""
for _ in range(MAX_RETRIES):
try:
request = bytearray(BUFFER_SIZE)
request_length = conn.recv_into(request)
if request_length == 0:
return
request_text = request[:request_length].decode()
# Add CORS headers to allow requests from web browsers
headers = [
"HTTP/1.1 200 OK",
"Access-Control-Allow-Origin: *",
"Access-Control-Allow-Methods: GET",
"Content-Type: text/plain",
]
if "GET /on" in request_text:
led.value = True
response = "LED turned on"
elif "GET /off" in request_text:
led.value = False
response = "LED turned off"
else:
response = "Invalid command"
headers.append(f"Content-Length: {len(response)}")
http_response = "\r\n".join(headers) + "\r\n\r\n" + response
# Send response with retries
for _ in range(MAX_RETRIES):
try:
conn.send(http_response.encode())
return True
except OSError as e:
if e.errno != 11: # EAGAIN
raise
time.sleep(RETRY_DELAY)
return False
except OSError as e:
if e.errno != 11: # If not EAGAIN
print(f"Error handling client: {e}")
return False
time.sleep(RETRY_DELAY)
return False
def web_server():
addr = wifi.radio.ipv4_address
print(f"Starting web server at http://{addr}")
with pool.socket() as s:
s.bind((str(addr), 80))
s.listen(1)
while True:
try:
conn, addr = s.accept()
print("Client connected from", addr)
try:
success = handle_client_connection(conn, addr)
if not success:
print("Failed to handle client after retries")
finally:
# Always close the connection
try:
conn.close()
except OSError:
pass
except OSError as e:
if e.errno == 11: # EAGAIN
# Small delay before next accept
time.sleep(RETRY_DELAY)
continue
print(f"Server error: {e}")
continue
print("Starting web server...")
web_server()GIT其他示例资料:
Adafruit ESP32-S3 Reverse TFT Feather
https://learn.adafruit.com/esp32-s3-reverse-tft-feather/circuitpython-internet-test
Networking in CircuitPython
https://learn.adafruit.com/networking-in-circuitpython/ntp-time-example#
Adafruit_CircuitPython_NTP
https://github.com/adafruit/Adafruit_CircuitPython_NTP
STM32
MCU
通讯及无线技术
物联网技术
电子DIY
板卡试用
基础知识
软件与操作系统
我爱生活
小e食堂