我的OLED上没有更新温度数据。无论如何，温度数都保持不变。
我正在使用带有DHT11温度/湿度传感器的ESP8266，一个Adafruit ssd1306 oled和2个按钮。
我的代码显示了Web服务器上的温度，该服务器在页面刷新时正常工作和更新。 现在，如果你按下一个按钮，字符串＆＃34;测试！＆＃34;会出现在oled上。如果按另一个按钮，将显示温度。
但如果我再次按下按钮或按下＆＃34;测试，温度永远不会更新！＆＃34;再次按下按钮和温度按钮。 因此，目前的温度数据并没有令人耳目一新。 我不确定这是否只是我的oled没有正确清除或者我的代码不允许buttonpress（）函数使用新临时数据更新的问题。或者也许它们都是？
有关如何使用当前温度数据（例如Web服务器）刷新oled的建议吗？
// Including the ESP8266 WiFi library
#include <ESP8266WiFi.h>
#include <DHT.h> // temp and humid sensor
// We need to include Wire.h for I2C communication
#include <Wire.h>
#include <SPI.h>
#include <Adafruit_SSD1306.h>
#define OLED_RESET LED_BUILTIN
Adafruit_SSD1306 display(OLED_RESET);
// Uncomment one of the lines below for whatever DHT sensor type you're using!
#define DHTTYPE DHT11 // DHT 11
//#define DHTTYPE DHT21 // DHT 21 (AM2301)
//#define DHTTYPE DHT22 // DHT 22 (AM2302), AM2321
int pushButton1 = 16;
int pushButton2 = 10;
int buttonState1 = 0;
int buttonState2 = 0;
// Replace with your network details
const char* ssid = "MyUsername";
const char* password = "MyPassword";
// Web Server on port 80
WiFiServer server(80);
// DHT Sensor
const int DHTPin = 2;
// Initialize DHT sensor.
DHT dht(DHTPin, DHTTYPE);
// Temporary variables
static char celsiusTemp[7];
static char fahrenheitTemp[7];
static char humidityTemp[7];
void setup() {
pinMode(pushButton1, INPUT);
pinMode(pushButton2, INPUT);
// Initializing serial port for debugging purposes
Serial.begin(115200);
delay(10);
// by default, we'll generate the high voltage from the 3.3v line internally! (neat!)
display.begin(SSD1306_SWITCHCAPVCC, 0x3D); // initialize with the I2C addr 0x3D (for the 128x64)
// init done
// Show image buffer on the display hardware.
// Since the buffer is intialized with an Adafruit splashscreen
// internally, this will display the splashscreen.
display.display();
delay(2000);
// Clear the buffer.
display.clearDisplay();
dht.begin();
// Connecting to WiFi network
Serial.println();
Serial.print("Connecting to ");
Serial.println(ssid);
WiFi.begin(ssid, password);
while (WiFi.status() != WL_CONNECTED) {
delay(500);
Serial.print(".");
}
Serial.println("");
Serial.println("WiFi connected");
// Starting the web server
server.begin();
Serial.println("Web server running. Waiting for the ESP IP...");
delay(10000);
// Printing the ESP IP address
Serial.println(WiFi.localIP());
}
// runs over and over again
void loop() {
buttonpress();
WiFiClient client = server.available();
if (client) {
Serial.println("New client");
// bolean to locate when the http request ends
boolean blank_line = true;
while (client.connected()) {
if (client.available()) {
char c = client.read();
if (c == '\n' && blank_line) {
// Sensor readings may also be up to 2 seconds 'old' (its a very slow sensor)
float h = dht.readHumidity();
// Read temperature as Celsius (the default)
float t = dht.readTemperature();
// Read temperature as Fahrenheit (isFahrenheit = true)
float f = dht.readTemperature(true);
// Check if any reads failed and exit early (to try again).
if (isnan(h) || isnan(t) || isnan(f)) {
Serial.println("Failed to read from DHT sensor!");
strcpy(celsiusTemp,"Failed");
strcpy(fahrenheitTemp, "Failed");
strcpy(humidityTemp, "Failed");
}
else{
// Computes temperature values in Celsius + Fahrenheit and Humidity
float hic = dht.computeHeatIndex(t, h, false);
dtostrf(hic, 6, 2, celsiusTemp);
float hif = dht.computeHeatIndex(f, h);
dtostrf(hif, 6, 2, fahrenheitTemp);
dtostrf(h, 6, 2, humidityTemp);
// You can delete the following Serial.print's, it's just for debugging purposes
Serial.print("Humidity: ");
Serial.print(h);
Serial.print(" %\t Temperature: ");
Serial.print(t);
Serial.print(" *C ");
Serial.print(f);
Serial.print(" *F\t Heat index: ");
Serial.print(hic);
Serial.print(" *C ");
Serial.print(hif);
Serial.print(" *F");
Serial.print("Humidity: ");
Serial.print(h);
Serial.print(" %\t Temperature: ");
Serial.print(t);
Serial.print(" *C ");
Serial.print(f);
Serial.print(" *F\t Heat index: ");
Serial.print(hic);
Serial.print(" *C ");
Serial.print(hif);
Serial.println(" *F");
}
client.println("HTTP/1.1 200 OK");
client.println("Content-Type: text/html");
client.println("Connection: close");
client.println();
// your actual web page that displays temperature and humidity
client.println("<!DOCTYPE HTML>");
client.println("<html>");
client.println("<head></head><body><h1>ESP8266 - Temperature and Humidity</h1><h3>Temperature in Celsius: ");
client.println(celsiusTemp);
client.println("*C</h3><h3>Temperature in Fahrenheit: ");
client.println(fahrenheitTemp);
client.println("*F</h3><h3>Humidity: ");
client.println(humidityTemp);
client.println("%</h3><h3>");
client.println("</body></html>");
break;
}
if (c == '\n') {
// when starts reading a new line
blank_line = true;
}
else if (c != '\r') {
// when finds a character on the current line
blank_line = false;
}
}
}
// closing the client connection
delay(1);
client.stop();
Serial.println("Client disconnected.");
}
}
void buttonpress() {
// read the state of the pushbutton value:
buttonState1 = digitalRead(pushButton1);
buttonState2 = digitalRead(pushButton2);
// check if the pushbutton is pressed.
// if it is, the buttonState is HIGH:
if (buttonState1 == LOW) {
// turn LED on:
Serial.println("Button 1 Pushed");
// text display tests
display.setTextSize(1);
display.setTextColor(WHITE);
display.setCursor(0,0);
display.println("Test!");
display.display();
delay(400);
display.clearDisplay();
}
if (buttonState2 == LOW) {
// turn LED on:
Serial.println("Button 2 Pushed");
// text display tests
display.setTextSize(2);
display.setTextColor(WHITE);
display.setCursor(0,0);
float f = dht.readTemperature(true);
display.println(f);
display.display();
delay(400);
display.clearDisplay();
}
}