NodeMCU温度读数到树莓派无线
问题描述:
我目前有问题从温度传感器收集数据到我的树莓派。 Pi说它没有收到任何数据。我也不确定GET和POST是如何工作的。我对这个东西相当新,所以任何帮助将不胜感激。NodeMCU温度读数到树莓派无线
也可以有人检讨我的sendTemperatureTS
方法和我的PHP代码,因为正如我所说我是新来的这个。顺便说一下,我在Raspberry Pi的/ var/www的PHP文件夹中创建了我的PHP文件。我用命令sudo nano collectdata.php
在PHP文件夹写我的代码
的Arduino代码:
#include <ESP8266WiFi.h>
#include <OneWire.h>
#include <DallasTemperature.h>
#define myPeriodic 15 //in sec | Thingspeak pub is 15sec
#define ONE_WIRE_BUS 2 // DS18B20 on arduino pin2 corresponds to D4 on physical board
OneWire oneWire(ONE_WIRE_BUS);
DallasTemperature DS18B20(&oneWire);
float prevTemp = 0;
const char* server = "172.168.2.143";
const char* MY_SSID = "AkhuogTkhbbEjhbuvouvr7i2";
const char* MY_PWD = "2pkpmbipsrbeirbp3niag%";
int sent = 0;
void setup() {
Serial.begin(115200);
connectWifi();
}
void loop() {
float temp;
//char buffer[10];
DS18B20.requestTemperatures();
temp = DS18B20.getTempCByIndex(0);
//String tempC = dtostrf(temp, 4, 1, buffer);//handled in sendTemp()
Serial.print(String(sent)+" Temperature: ");
Serial.println(temp);
sendTemperatureTS(temp);
int count = myPeriodic;
while(count--)
delay(1000);
}
void connectWifi() {
Serial.print("Connecting to "+*MY_SSID);
WiFi.begin(MY_SSID, MY_PWD);
while (WiFi.status() != WL_CONNECTED) {
delay(1000);
Serial.print(".");
}
Serial.println("");
Serial.println("Connected");
Serial.println("");
}//end connect
void sendTemperatureTS(float temp) {
WiFiClient client;
if (client.connect(server, 80)) {
Serial.println("WiFi Client connected ");
String postStr = "/php/";
postStr += "?temp=";
postStr += String(temp);
postStr += "\r\n\r\n";
client.print("POST 172.168.2.143/php/collectdata.php HTTP/1.1\n");
client.print("Host: 122.168.2.143\n");
client.print("Connection: close\n");
client.print("Content-Type: application/x-www-form-urlencoded\n");
client.print("Content-Length: ");
client.print(postStr.length());
client.print("\n\n");
client.print(postStr);
delay(1000);
}//end if
sent++;
client.stop();
}
PHP代码:
<?php
$servername = “172.168.2.143”;
$username = “esp8266”;
$password = “Tutorial”;
$dbname = “esp8266”;
$temp = $_POST[‘temp’];
$conn = mysql_connect(“172.168.2.143”,”esp8266”,”Tutorial”);
if(!$conn) {
die(‘Could not connect: ’ . mysql_error());
}
$datenow = date(‘Y-m-d’);
$sql = “INSERT INTO `JSDataTable`(`logdate`,`temperature`) VALUES (\”$datenow\”,\”$temp\”)”;
$result = mysql_query($sql);
if(!result) {
die(‘Invalid query: ‘ . mysql_error());
}
echo “<h1>The data has been sent!</h1>”;
mysql_close($conn);
>
答
#include <ESP8266WiFi.h>
#include <OneWire.h>
#include <DallasTemperature.h>
#include <WiFiClient.h>
#define myPeriodic 15 //in sec | Thingspeak pub is 15sec
#define ONE_WIRE_BUS 2 // DS18B20 on arduino pin2 corresponds to D4 on physical board
OneWire oneWire(ONE_WIRE_BUS);
DallasTemperature DS18B20(&oneWire);
float prevTemp = 0;
const char* server = "172.168.2.143";
const char* MY_SSID = "AkhuogTkhbbEjhbuvouvr7i2";
const char* MY_PWD = "2pkpmbipsrbeirbp3niag%";
int sent = 0;
void setup() {
Serial.begin(115200);
connectWifi();
}
void loop() {
float temp;
//char buffer[10];
DS18B20.requestTemperatures();
temp = DS18B20.getTempCByIndex(0);
//String tempC = dtostrf(temp, 4, 1, buffer);//handled in sendTemp()
Serial.print(String(sent)+" Temperature: ");
Serial.println(temp);
//if (temp != prevTemp)
//{
//sendTemperatureTS(temp);
//prevTemp = temp;
//}
sendTemperatureTS(temp);
int count = myPeriodic;
while(count--)
delay(1000);
}
void connectWifi()
{
Serial.print("Connecting to "+*MY_SSID);
WiFi.begin(MY_SSID, MY_PWD);
while (WiFi.status() != WL_CONNECTED) {
delay(1000);
Serial.print(".");
}
Serial.println("");
Serial.println("Connected");
Serial.println("");
}//end connect
void sendTemperatureTS(float temp)
{
WiFiClient client;
if (client.connect(server, 80)) {
Serial.println("WiFi Client connected ");
String url = "/collectdata.php?";
url += "&temp=";
url += temp;
client.print(String("GET ") + url + " HTTP/1.1\r\n" +
"Server: " + server + "\r\n" +
"Connection: close\r\n\r\n");
}
您的PHP代码无效。您正在使用错误的引号。并找到一个更好的PHP教程。 'mysql_ *'API自7.0.0中删除以来已被弃用。 –
另外[SQL注入](http://bobby-tables.com/)现在不应该是一件事情。 –