使用MicroPython编程的方式通过ESP32和4G模块实时显示时间
时间: 2023-05-31 13:01:38 浏览: 70
以下是使用MicroPython编程的方式通过ESP32和4G模块实时显示时间的示例代码:
```python
import machine
import time
import network
import socket
import json
from dht import DHT11
from machine import Pin, I2C
from ssd1306 import SSD1306_I2C
from umqtt.simple import MQTTClient
# Define 4G module IP address and port number
SERVER = "xx.xx.xx.xx" # Replace with your 4G module IP address
PORT = 1883
# Define MQTT topics
TOPIC_TIME = b"home/time"
# Connect to WiFi
wlan = network.WLAN(network.STA_IF)
wlan.active(True)
wlan.connect("YOUR_SSID", "YOUR_PASSWORD")
# Connect to MQTT broker
mqtt_client = MQTTClient("esp32", SERVER, PORT)
mqtt_client.connect()
# Initialize OLED display
i2c = I2C(scl=Pin(22), sda=Pin(21))
oled = SSD1306_I2C(128, 64, i2c)
# Initialize DHT11 sensor
dht11 = DHT11(Pin(5))
while True:
# Get current time
current_time = time.localtime()
# Publish current time to MQTT broker
time_payload = json.dumps({
"hour": current_time[3],
"minute": current_time[4],
"second": current_time[5]
})
mqtt_client.publish(TOPIC_TIME, time_payload)
# Read temperature and humidity from DHT11 sensor
dht11.measure()
temperature = dht11.temperature()
humidity = dht11.humidity()
# Display current time, temperature, and humidity on OLED display
oled.fill(0)
oled.text("Time: {:02d}:{:02d}:{:02d}".format(current_time[3], current_time[4], current_time[5]), 0, 0)
oled.text("Temp: {} C".format(temperature), 0, 20)
oled.text("Humidity: {}%".format(humidity), 0, 40)
oled.show()
time.sleep(1)
```
这段代码使用了MicroPython的网络库和MQTT库来连接到4G模块并发布当前时间的消息。它还使用了DHT11传感器来读取温度和湿度,并将它们显示在OLED显示屏上。请注意,您需要将代码中的“YOUR_SSID”和“YOUR_PASSWORD”替换为您的WiFi SSID和密码,以及将“xx.xx.xx.xx”替换为您的4G模块的IP地址。
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