I want to send sensor data(like DHT) from NODEMCU to LABVIEW.
Is there any library or sketch to do this ?
NODEMCU is connected to network in station mode.
In labview, I have to use which library to do this?
Solved :
1. Try this library in Arduino IDE: ESP8266WiFi.h
host is your PC like 192.168.1.11
port : 550 (for example)
#include <ESP8266WiFi.h>
const char* ssid = "xxxx"; // SSID
const char* password = "xxxx"; // Password
const char* host = "xxx.xxx.xxx.xxx"; // Server IP
const int port = 550; // Server Port
const int watchdog = 5000; // Watchdog frequency
unsigned long previousMillis = millis();
void setup() {
Serial.begin(115200);
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");
Serial.println("IP address: ");
Serial.println(WiFi.localIP());
}
void loop() {
unsigned long currentMillis = millis();
if ( currentMillis - previousMillis > watchdog ) {
previousMillis = currentMillis;
WiFiClient client;
if (!client.connect(host, port)) {
Serial.println("connection failed");
return;
}
String url = "/watchdog?command=watchdog&uptime=";
url += String(millis());
url += "&ip=";
url += WiFi.localIP().toString();
// Envoi la requete au serveur - This will send the request to the server
client.print(String("GET ") + url + " HTTP/1.1\r\n" +
"Host: " + host + "\r\n" +
"Connection: close\r\n\r\n");
unsigned long timeout = millis();
while (client.available() == 0) {
if (millis() - timeout > 5000) {
Serial.println(">>> Client Timeout !");
client.stop();
return;
}
}
// Read all the lines of the reply from server and print them to Serial
while(client.available()){
String line = client.readStringUntil('\r');
Serial.print(line);
}
}
}
2. labview : you need 2 blocks to do this :
TCP LISTEN
TCP READ
Related
I would like to use https://github.com/tzapu/WiFiManager in conjunction with onSoftAPModeProbeRequestReceived. The end goal is to config the wifi with WifiMaager then "switch over" and send probe request information via the wifi.
I get this to work without wifi manager using the following
#include <ESP8266httpUpdate.h>
#include <ESP8266WiFi.h>
#include <esp8266httpclient.h>
#include <stdio.h>
const char* ssid = "someap"; // The SSID (name) of the Wi-Fi
network you want to connect to
const char* password = ""; // The password of the Wi-Fi network
int status = WL_IDLE_STATUS;
String macAddr = "";
WiFiEventHandler probeRequestPrintHandler;
WiFiEventHandler probeRequestBlinkHandler;
bool blinkFlag;
void setup() {
Serial.begin(115200);
pinMode(LED_BUILTIN, OUTPUT);
digitalWrite(LED_BUILTIN, HIGH);
Serial.print("Starting");
WiFi.persistent(false);
WiFi.mode(WIFI_AP);
WiFi.softAP(ssid, password);
probeRequestPrintHandler =
WiFi.onSoftAPModeProbeRequestReceived(&onProbeRequestPrint);
probeRequestBlinkHandler =
WiFi.onSoftAPModeProbeRequestReceived(&onProbeRequestBlink);
while ( status != 3)
{
Serial.print("Attempting to connect to network, SSID: ");
Serial.println(ssid);
status = WiFi.status();
WiFi.begin(ssid, password);
// wait 10 seconds for connection:
delay(10000);
}
Serial.println(WiFi.localIP());
}
void onProbeRequestPrint(const WiFiEventSoftAPModeProbeRequestReceived& evt)
{
if (macAddr != macToString(evt.mac))
{
macAddr = macToString(evt.mac);
Serial.print("Probe request from: ");
Serial.print(macToString(evt.mac));
Serial.print(" RSSI: ");
Serial.println(evt.rssi);
}
}
void onProbeRequestBlink(const WiFiEventSoftAPModeProbeRequestReceived&) {
blinkFlag = true;
}
void loop() {
if (blinkFlag) {
HTTPClient http; //Declare an object of class HTTPClient
http.begin("http://requestbin.fullcontact.com/110f1ss6a1?test=true");
//Specify request destination
int httpCode = http.GET();
Serial.println(httpCode);
if (httpCode > 0) { //Check the returning code
String payload = http.getString(); //Get the request response payload
Serial.println(payload); //Print the response payload
}
http.end(); //Close connection
macAddr="";
blinkFlag = false;
digitalWrite(LED_BUILTIN, LOW);
delay(100);
digitalWrite(LED_BUILTIN, HIGH);
status = 0;
}
delay(1000);
}
String macToString(const unsigned char* mac) {
char buf[20];
snprintf(buf, sizeof(buf), "%02x:%02x:%02x:%02x:%02x:%02x",
mac[0], mac[1], mac[2], mac[3], mac[4], mac[5]);
return String(buf);
}
When the connection is established we rely on WiFiEventHandler probeRequestPrintHandler; and WiFiEventHandler probeRequestBlinkHandler; This does work and does collect the mac address, how ever it can not connect to the AP. Do I need to close the current wifi mode open the connection then close it?
Seems all I needed to do is add WiFi.begin(); before void loop()
I want to connect to an url of a cloud function but isn´t working. someone can see the error? I´m working with an ESP8266 from arduino IDE. I try sending a POST request by postman and it function perfectly, I don´t understan what is the problem with the conection, i always try to connect with out the https and only with http and again in the esp8266 didn´t wotk but in postman does works fine, I do not understant why is this problem
#include <ESP8266WiFi.h>
#include <WiFiClientSecure.h>
const char* ssid = "My wifi";
const char* password = "My Password";
const char* host = "https://us-central1-sensores4bad6.cloudfunctions.net/actualizar";
void setup() {
Serial.begin(9600);
delay(10);
Serial.println();
Serial.println();
Serial.print("Connecting to ");
Serial.println(ssid);
WiFi.mode(WIFI_STA);
WiFi.begin(ssid, password);
while (WiFi.status() != WL_CONNECTED) {
delay(500);
Serial.print(".");
}
Serial.println("");
Serial.println("WiFi connected");
Serial.println("IP address: ");
Serial.println(WiFi.localIP());
}
int value = 0;
void loop() {
delay(5000);
++value;
Serial.print("connecting to ");
Serial.println(host);
WiFiClientSecure client;
const int httpPort = 443;
if (!client.connect(host, httpPort)) {
Serial.println("connection failed");
return;
}
client.print(String("POST ") + host + " HTTP/1.1\r\n" +
"Host: " + host + "\r\n" +
"Connection: close\r\n\r\n");
unsigned long timeout = millis();
while (client.available() == 0) {
if (millis() - timeout > 5000) {
Serial.println(">>> Client Timeout !");
client.stop();
return;
}
}
while (client.available()) {
String line = client.readStringUntil('\r');
Serial.print(line);
}
Serial.println();
Serial.println("closing connection");
}
Try removing the s in https. So:
const char* host = "http://us-central1-sensores4bad6.cloudfunctions.net/actualizar";
instead of
const char* host = "https://us-central1-sensores4bad6.cloudfunctions.net/actualizar";
I am trying to connect my Arduino Uno with WiFi shield to my MQTT server. I am running it local on my Mac. It seems to be stuck in the while loop. I think it doesn't connect to the broker. Here is my code. What could be the problem with the loop? Or is there another problem?
#include <WiFi.h>
#include <MQTTClient.h>
const char ssid[] = " : /*filed in*: ";
const char pass[] = " /*filed in*/ ";
WiFiClient net;
MQTTClient client;
unsigned long lastMillis = 0;
void setup() {
Serial.begin(9600);
WiFi.begin(ssid, pass);
// Note: Local domain names (e.g. "Computer.local" on OSX) are not supported by Arduino.
// You need to set the IP address directly.
client.begin("10.0.1.5", net);
client.onMessage(messageReceived);
connect();
}
void connect() {
Serial.print("checking wifi...");
while (WiFi.status() != WL_CONNECTED) {
Serial.print(".");
delay(1000);
}
Serial.println("wifi connected");
Serial.print("\nconnecting...");
while (!client.connect("Arduino test")) {
Serial.print(".");
delay(1000);
}
Serial.println("\nconnected!");
Serial.println("connected");
client.subscribe("hello");
// client.unsubscribe("/hello");
}
void loop() {
client.loop();
if (!client.connected()) {
connect();
Serial.print("not");
}
// publish a message roughly every second.
if (millis() - lastMillis > 1000) {
lastMillis = millis();
client.publish("hello world");
}
}
void messageReceived(String &topic, String &payload) {
Serial.println("incoming: " + topic + " - " + payload);
}
Hi i am trying to test a value form nodemcu board i am using arduino ide to code and have modified the WIFIClient example to send a value to my localhost using GET. it gives me bad request error. any help or suggestion is appreciated
Modified WIFIClinet
#include <ESP8266WiFi.h>
const char* ssid = "ssid";
const char* password = "pwd";
const char* host = "http://10.0.0.39/edu/arduino.php";
void setup() {
Serial.begin(115200);
delay(10);
// We start by connecting to a WiFi network
Serial.println();
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");
Serial.println("IP address: ");
Serial.println(WiFi.localIP());
}
int value = 0;
void loop() {
delay(5000);
++value;
Serial.print("connecting to ");
Serial.println(host);
// Use WiFiClient class to create TCP connections
WiFiClient client;
const int httpPort = 80;
if (!client.connect(host, httpPort)) {
Serial.println("connection failed");
return;
}
// We now create a URI for the request
String url ="?v=we";
//
//
Serial.print("Requesting URL: ");
Serial.println(url);
// This will send the request to the server
client.print(String("GET ") + url + " HTTP/1.1\r\n" +
"Host: " + host + "\r\n" +
"Connection: close\r\n\r\n");
//
unsigned long timeout = millis();
while (client.available() == 0) {
if (millis() - timeout > 5000) {
Serial.println(">>> Client Timeout !");
client.stop();
return;
}
}
// Read all the lines of the reply from server and print them to Serial
while(client.available()){
String line = client.readStringUntil('\r');
Serial.print(line);
}
Serial.println();
Serial.println("closing connection");
}
Output from serial monitor
connecting to http://10.0.0.39/edu/arduino.php
Requesting URL: ?v=we
HTTP/1.0 400 Bad Request
Server: httpd
Date: Sat, 01 Jan 2011 22:02:19 GMT
Content-Type: text/html
Connection: close
<HTML><HEAD><TITLE>400 Bad Request</TITLE></HEAD>
<BODY BGCOLOR="#cc9999"><H4>400 Bad Request</H4>
Bad filename.
</BODY></HTML>
I hope this is helpful for people running this on local host i changed
const char* host = "http://10.0.0.39/edu/arduino.php";
to
const char* host = "10.0.0.39";
and
String url ="?v=we";
to
String url ="/edu/arduino.php?v=we";
Description
I am writing a web server on ESP-8266(01), that will control 3 locks using Arduino Mega.
The locks will be controlled by Bluetooth ESP 8266 (get method from phone) and using my laptops browser.
I can do it all with bluetooth HC-05 (easily).
The issue I am facing is with my ESP-8266 wifi module.
I need to send 3 different strings from ESP for Arduino to read it.
If it's "AAAA" Arduino will read it and unlock door one, if it BBBB then door 2 and etc etc.....
So I used this code:
#include <ESP8266WiFi.h>
const char* ssid = "Do-Not-Ask-For-Password";
const char* password = "ITISMYPASSWORD";
//const char* ssid = "`STAR-NET-Azhar-32210352";
//const char* password = "ITISMYPASSWORD";
int ledPin = 2; // GPIO2
WiFiServer server(80);
// Update these with values suitable for your network.
IPAddress ip(192,168,8,128); //Node static IP
IPAddress gateway(192,168,8,1);
IPAddress subnet(255,255,255,0);
void setup() {
Serial.begin(115200);
delay(10);
pinMode(ledPin, OUTPUT);
digitalWrite(ledPin, LOW);
// Connect to WiFi network
Serial.println();
Serial.println();
Serial.print("connecting to ");
Serial.println(ssid);
WiFi.begin(ssid, password);
WiFi.config(ip, gateway, subnet);
while (WiFi.status() != WL_CONNECTED) {
delay(500);
Serial.print(".");
}
Serial.println("");
Serial.println("WiFi connected");
// Start the server
server.begin();
Serial.println("Server started");
// Print the IP address
Serial.print("Use this URL to connect: ");
Serial.print("http://");
Serial.print(WiFi.localIP());
Serial.println("/");
}
void loop() {
ESP.wdtDisable();
// Check if a client has connected
WiFiClient client = server.available();
if (!client) {
return;
}
// Wait until the client sends some data
// Serial.println("new client");
// while(!client.available()){
// delay(1);
// }
if(!client.available()){
delay(1);
client.flush();
}
// Read the first line of the request
String request = client.readStringUntil('\r');
//Serial.println(request);
client.flush();
// Match the request
int value1 = LOW;
int value2 = LOW;
int value3 = LOW;
if (request.indexOf("/LOCK=ON1") != -1) {
//digitalWrite(ledPin, HIGH);
value1 = HIGH;
Serial.println("AAAA");
}
if(request.indexOf("/LOCK=ON2") != -1){
value2 = HIGH;
Serial.println("BBBB");
}
if(request.indexOf("/LOCK=ON3") != -1){
value3 = HIGH;
Serial.println("CCCC");
}
// Set ledPin according to the request
//digitalWrite(ledPin, value);
// Return the response
client.println("HTTP/1.1 200 OK");
client.println("Content-Type: text/html");
client.println(""); // do not forget this one
client.println("<!DOCTYPE HTML>");
client.println("<html>");
client.println("<br><br>");
client.print("LOCK ONE IS NOW: ");
if(value1 == HIGH) {
client.print("UNLOCKED");
// Serial.println("A");
} else {
client.print("LOCKED");
}
client.println("<br><br>");
client.print("LOCK TWO IS NOW: ");
if(value2 == HIGH) {
client.print("UNLOCKED");
// Serial.println("B");
} else {
client.print("LOCKED");
}
client.println("<br><br>");
client.print("LOCK THREE IS NOW: ");
if(value3 == HIGH) {
client.print("UNLOCKED");
//Serial.println("C");
} else {
client.print("LOCKED");
}
client.println("<br><br>");
client.println("CLICK HERE TO UNLOCK THE LOCK ONE<br>");
client.println("CLICK HERE TO UNLOCK THE LOCK TWO<br>");
client.println("CLICK HERE TO UNLOCK THE LOCK THREE<br>");
client.println("</html>");
delay(100);
//Serial.println("client disconnected");
// Serial.println("");
}
The Result I Get on Browser is ( Which is What i need):
enter image description here
ISSUE:
Now The Issue Is Some Times it misses the serial data i send, For Example if i click unlock door 1, It sends data and i click unlock door 2 it does nothn and when i reset it sends data from all 3 but for two to 3 times and then module resets it self ....
This Is What I got From Serial Monitor:
enter image description here
Now i have searched alot and its watchdre out what i did wrong in the code.
this is how my ESP is connected:
vcc & CHPD to 3.3V ragulator
gnd to gnd of powersuply and to arduino gnd...
GP 0 ------> 3.3v with 2.2k Resistor ( in non flashing state).
Rst ------> 3.3v with resistor
RX to TX
TX to RX
Any Ideas how to fix it?
Is There any other way to control Arduino pins (6 different pins) from ESP 8266 module??
ive been trying from many days please help!!
Ok I am Posting It For those who are facing the same problem!! i took the Hello ESP example And Modified it to Print Serial!!!
On Mega My Serial Was Started at 9600 and i started Serial On ESP at 9600 aswell :| So This is the Code .... Slow Server and WDT issue is Almost Gone....
#include <ESP8266WiFi.h>
#include <WiFiClient.h>
#include <ESP8266WebServer.h>
#include <ESP8266mDNS.h>
//const int RELAY_PIN = 2; //RELAY
const char* ssid = "Do-Not-Ask-For-Password";
const char* password = "AeDrki$32ILA!$#2";
MDNSResponder mdns;
ESP8266WebServer server(80);
void handleRoot() {
server.send(200, "text/plain", "hWelcome To Door Unlock Project By Haziq Sheikh");
}
void handleNotFound(){
String message = "File Not Found\n\n";
message += "URI: ";
message += server.uri();
message += "\nMethod: ";
message += (server.method() == HTTP_GET)?"GET":"POST";
message += "\nArguments: ";
message += server.args();
message += "\n";
for (uint8_t i=0; i<server.args(); i++){
message += " " + server.argName(i) + ": " + server.arg(i) + "\n";
}
server.send(404, "text/plain", message);
}
void setup(void){
// pinMode(RELAY_PIN, OUTPUT);
Serial.begin(9600);
WiFi.begin(ssid, password);
Serial.println("");
// Wait for connection
while (WiFi.status() != WL_CONNECTED) {
delay(500);
Serial.print(".");
//digitalWrite(RELAY_PIN, 1);
}
Serial.println("");
Serial.print("Connected to ");
Serial.println(ssid);
Serial.print("IP address: ");
Serial.println(WiFi.localIP());
// digitalWrite(RELAY_PIN, 0);
if (mdns.begin("esp8266", WiFi.localIP())) {
Serial.println("MDNS responder started");
}
server.on("/", handleRoot);
server.on("/lock1", [](){
server.send(200, "text/plain", "Okay Door One Unlocked");
Serial.println("AAAA");
});
server.on("/lock2", [](){
server.send(200, "text/plain", "Okay -- Door 2 Unlocked");
Serial.println("BBBB");
});
server.on("/lock3", [](){
server.send(200, "text/plain", "Okay -- Door 3 is Unlocked");
Serial.println("CCCC");
});
server.onNotFound(handleNotFound);
server.begin();
Serial.println("HTTP server started");
}
void loop(void){
server.handleClient();
}