esp8266使用HLW8032模块采集电压电流功率并在0.96OLED屏幕显示

以下是基于Arduino平台的代码：

首先，需要安装以下库：

Adafruit_SSD1306

Wire

ESP8266WiFi

ESP8266HTTPClient

然后，将HLW8032模块连接到ESP8266的引脚：

- VCC -> 3.3V
- GND -> GND
- SEL -> D1
- CF -> D2
- CF1 -> D3

最后，将0.96 OLED屏幕连接到ESP8266的引脚：

- VCC -> 3.3V
- GND -> GND
- SDA -> D4
- SCL -> D5

代码如下：

#include <Wire.h>
#include <Adafruit_SSD1306.h>
#include <ESP8266WiFi.h>
#include <ESP8266HTTPClient.h>

Adafruit_SSD1306 display(128, 64, &Wire, -1);

const char* ssid = "your_ssid";
const char* password = "your_password";

float voltage = 0.0;
float current = 0.0;
float power = 0.0;

void setup() {
Serial.begin(9600);
display.begin(SSD1306_SWITCHCAPVCC, 0x3C);
display.clearDisplay();
display.setTextColor(WHITE);
display.setTextSize(1);
display.setCursor(0,0);
display.println("HLW8032 Example");
display.display();

WiFi.begin(ssid, password);
while (WiFi.status() != WL_CONNECTED) {
delay(1000);
Serial.println("Connecting to WiFi...");
}
Serial.println("Connected to WiFi");

pinMode(D1, OUTPUT);
digitalWrite(D1, HIGH);
}

void loop() {
HTTPClient http;

http.begin("http://192.168.0.100/"); // replace with your server address
int httpCode = http.GET();
if (httpCode == HTTP_CODE_OK) {
String payload = http.getString();

int index = payload.indexOf(":");
voltage = payload.substring(0, index).toFloat();
payload = payload.substring(index+1);

index = payload.indexOf(":");
current = payload.substring(0, index).toFloat();
payload = payload.substring(index+1);

power = payload.toFloat();
}
http.end();

display.clearDisplay();
display.setCursor(0,0);
display.print("Voltage: ");
display.print(voltage);
display.print("V");
display.setCursor(0,10);
display.print("Current: ");
display.print(current);
display.print("A");
display.setCursor(0,20);
display.print("Power: ");
display.print(power);
display.print("W");
display.display();

delay(1000);
}

在这个例子中，ESP8266将通过HTTP请求从服务器获取电压、电流和功率数据，并将其显示在OLED屏幕上。在服务器端，需要编写一个简单的脚本来读取HLW8032模块的数据并将其返回给ESP8266。脚本如下：

import RPi.GPIO as GPIO
import time

GPIO.setmode(GPIO.BCM)
GPIO.setup(18, GPIO.OUT)

def read_hlw8032():
GPIO.output(18, GPIO.HIGH)
time.sleep(0.00001)
GPIO.output(18, GPIO.LOW)

voltage = 0.0
current = 0.0
power = 0.0

for i in range(10):
GPIO.setup(18, GPIO.IN)
while GPIO.input(18) == GPIO.LOW:
pass
while GPIO.input(18) == GPIO.HIGH:
pass
GPIO.setup(18, GPIO.OUT)
GPIO.output(18, GPIO.LOW)

data = []
for j in range(6):
byte = 0
for k in range(8):
GPIO.setup(18, GPIO.IN)
while GPIO.input(18) == GPIO.LOW:
pass
count = 0
while GPIO.input(18) == GPIO.HIGH:
count += 1
if count > 100:
break
if count > 50:
byte |= 1 << (7 - k)
data.append(byte)

if data[0] == 0x55 and data[1] == 0x55 and data[5] == 0xC0:
voltage = ((data[2] << 8) + data[3]) / 100.0
current = ((data[2] << 8) + data[3]) / 1000.0
power = ((data[4] << 8) + data[5]) / 10.0

return voltage, current, power

from flask import Flask, jsonify

app = Flask(__name__)

@app.route('/')
def get_data():
voltage, current, power = read_hlw8032()
return jsonify({'voltage': voltage, 'current': current, 'power': power})

if __name__ == '__main__':
app.run(host='0.0.0.0', port=80)

在这个例子中，使用了Flask框架来编写Web应用程序。该应用程序将在HTTP请求中返回电压、电流和功率数据，并由ESP8266进行处理和显示。请注意，服务器的IP地址需要根据您的网络配置进行修改。