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d46d742db1
Many people have problems with using ESP8266 as WiFi-client due to none of the examples mentioning that you should use WIFI_STA if you only want the ESP8266 to act as a WiFi-client. Many WiFi-devices will randomly try to connect to the ESP8266 if used as STA+AP and complain about not being able to access the Internet or other devices on the network.
97 lines
2.3 KiB
C++
97 lines
2.3 KiB
C++
/*
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* This sketch sends data via HTTP GET requests to data.sparkfun.com service.
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*
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* You need to get streamId and privateKey at data.sparkfun.com and paste them
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* below. Or just customize this script to talk to other HTTP servers.
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*
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*/
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#include <ESP8266WiFi.h>
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const char* ssid = "your-ssid";
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const char* password = "your-password";
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const char* host = "data.sparkfun.com";
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const char* streamId = "....................";
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const char* privateKey = "....................";
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void setup() {
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Serial.begin(115200);
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delay(10);
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// We start by connecting to a WiFi network
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Serial.println();
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Serial.println();
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Serial.print("Connecting to ");
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Serial.println(ssid);
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/* Explicitly set the ESP8266 to be a WiFi-client, otherwise, it by default,
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would try to act as both a client and an access-point and could cause
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network-issues with your other WiFi-devices on your WiFi-network. */
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WiFi.mode(WIFI_STA);
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WiFi.begin(ssid, password);
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while (WiFi.status() != WL_CONNECTED) {
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delay(500);
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Serial.print(".");
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}
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Serial.println("");
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Serial.println("WiFi connected");
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Serial.println("IP address: ");
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Serial.println(WiFi.localIP());
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}
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int value = 0;
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void loop() {
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delay(5000);
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++value;
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Serial.print("connecting to ");
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Serial.println(host);
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// Use WiFiClient class to create TCP connections
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WiFiClient client;
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const int httpPort = 80;
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if (!client.connect(host, httpPort)) {
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Serial.println("connection failed");
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return;
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}
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// We now create a URI for the request
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String url = "/input/";
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url += streamId;
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url += "?private_key=";
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url += privateKey;
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url += "&value=";
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url += value;
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Serial.print("Requesting URL: ");
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Serial.println(url);
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// This will send the request to the server
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client.print(String("GET ") + url + " HTTP/1.1\r\n" +
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"Host: " + host + "\r\n" +
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"Connection: close\r\n\r\n");
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unsigned long timeout = millis();
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while (client.available() == 0) {
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if (millis() - timeout > 5000) {
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Serial.println(">>> Client Timeout !");
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client.stop();
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return;
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}
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}
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// Read all the lines of the reply from server and print them to Serial
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while(client.available()){
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String line = client.readStringUntil('\r');
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Serial.print(line);
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}
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Serial.println();
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Serial.println("closing connection");
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}
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