1 | /*
|
2 | This sketch establishes a TCP connection to a "quote of the day" service.
|
3 | It sends a "hello" message, and then prints received data.
|
4 | */
|
5 |
|
6 | #include <ESP8266WiFi.h>
|
7 |
|
8 | #ifndef STASSID
|
9 | #define STASSID "shellyem3-3494547B8D61"
|
10 | #define STAPSK ""
|
11 | #endif
|
12 |
|
13 | const char* ssid = STASSID;
|
14 | const char* password = STAPSK;
|
15 |
|
16 | const char* host = "192.168.33.1";
|
17 | const uint16_t port = 80;
|
18 |
|
19 | void setup() {
|
20 | Serial.begin(115200);
|
21 |
|
22 | // We start by connecting to a WiFi network
|
23 |
|
24 | Serial.println();
|
25 | Serial.println();
|
26 | Serial.print("Connecting to ");
|
27 | Serial.println(ssid);
|
28 |
|
29 | /* Explicitly set the ESP8266 to be a WiFi-client, otherwise, it by default,
|
30 | would try to act as both a client and an access-point and could cause
|
31 | network-issues with your other WiFi-devices on your WiFi-network. */
|
32 | WiFi.mode(WIFI_STA);
|
33 | WiFi.begin(ssid, password);
|
34 |
|
35 | while (WiFi.status() != WL_CONNECTED) {
|
36 | delay(500);
|
37 | Serial.print(".");
|
38 | }
|
39 |
|
40 | Serial.println("");
|
41 | Serial.println("WiFi connected");
|
42 | Serial.println("IP address: ");
|
43 | Serial.println(WiFi.localIP());
|
44 | }
|
45 |
|
46 | void loop() {
|
47 | static bool wait = false;
|
48 |
|
49 | Serial.print("connecting to ");
|
50 | Serial.print(host);
|
51 | Serial.print(':');
|
52 | Serial.println(port);
|
53 |
|
54 | // Use WiFiClient class to create TCP connections
|
55 | WiFiClient client;
|
56 | if (!client.connect(host, port)) {
|
57 | Serial.println("connection failed");
|
58 | delay(5000);
|
59 | return;
|
60 | }
|
61 |
|
62 | // This will send a string to the server
|
63 | Serial.println("sending data to server");
|
64 |
|
65 |
|
66 | if (client.connected()) { client.println("shellyem3-3494547B8D61/emeter/0?"); }
|
67 |
|
68 |
|
69 |
|
70 | // wait for data to be available
|
71 | unsigned long timeout = millis();
|
72 | while (client.available() == 0) {
|
73 | if (millis() - timeout > 5000) {
|
74 | Serial.println(">>> Client Timeout !");
|
75 | client.stop();
|
76 | delay(60000);
|
77 | return;
|
78 | }
|
79 | }
|
80 |
|
81 | // Read all the lines of the reply from server and print them to Serial
|
82 | Serial.println("receiving from remote server");
|
83 | // not testing 'client.connected()' since we do not need to send data here
|
84 | while (client.available()) {
|
85 | char ch = static_cast<char>(client.read());
|
86 | Serial.print(ch);
|
87 | }
|
88 |
|
89 | // Close the connection
|
90 | Serial.println();
|
91 | Serial.println("closing connection");
|
92 | client.stop();
|
93 |
|
94 | if (wait) {
|
95 | delay(300000); // execute once every 5 minutes, don't flood remote service
|
96 | }
|
97 | wait = true;
|
98 | }
|
Announcement: there is an English version of this forum on 
Thread beobachten
Seitenaufteilung abschalten