樹莓派和esp8266需要在同一局域網下
esp8266使用arduino開發：
接入一個電容土壤溼度傳感器，採集溼度需要使用adc
#include <ESP8266WiFi.h> #include <WiFiUdp.h> const char* ssid = "litianmenzhenbu"; const char* password = "LT12345678"; const char* serverIp = "192.168.0.110"; const int serverPort = 5005; const int adcPin = A0; WiFiUDP udp; void setup() { Serial.begin(115200); WiFi.begin(ssid, password); while (WiFi.status() != WL_CONNECTED) { delay(1000); Serial.println("Connecting to WiFi..."); } Serial.println("Connected to WiFi"); udp.begin(udp.localPort()); } void loop() { int adcValue = analogRead(adcPin); Serial.print("adcValue:"); Serial.println(adcValue); udp.beginPacket(serverIp, serverPort); udp.write((byte*)&adcValue, sizeof(adcValue)); udp.endPacket(); delay(1000); }
樹莓派使用python開發：
from flask import Flask, render_template import socket import threading app = Flask(__name__) # 設置樹莓派的IP地址和端口 raspberry_pi_ip = '192.168.0.110' raspberry_pi_port = 5005 adc_value = 0 # 接收UDP數據 def receive_udp_data(): global adc_value udp_socket = socket.socket(socket.AF_INET, socket.SOCK_DGRAM) udp_socket.bind((raspberry_pi_ip, raspberry_pi_port)) while True: data, _ = udp_socket.recvfrom(1024) adc_value = 70 - int.from_bytes(data, byteorder='little') # 在這裏處理ADC數據，例如將其存儲到數據庫或進行其他操作 # 啓動接收UDP數據的線程 udp_thread = threading.Thread(target=receive_udp_data) udp_thread.daemon = True udp_thread.start() # 網頁主頁 @app.route('/') def index(): # 在這裏獲取ADC數據，例如從數據庫中讀取最新的ADC值 return render_template('index1.html', adc_value=adc_value) if __name__ == '__main__': app.run(host='0.0.0.0', port=8888)
index.html
<!DOCTYPE html> <html> <head> <title>ADC Data</title> </head> <body> <h1>ADC Data: {{ adc_value }}</h1> </body> </html>
效果：
