Earle F. Philhower, III
e2afeaef27
Takes a list of APs, finds the one with highest RSSI, and tries to connect.
96 lines
2.1 KiB
Arduino
96 lines
2.1 KiB
Arduino
/*
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This sketch establishes a TCP connection to a "quote of the day" service.
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It sends a "hello" message, and then prints received data.
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*/
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#include <WiFi.h>
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#ifndef STASSID
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#define STASSID "your-ssid"
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#define STAPSK "your-password"
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#endif
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const char* ssid = STASSID;
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const char* password = STAPSK;
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const char* host = "djxmmx.net";
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const uint16_t port = 17;
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WiFiMulti multi;
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void setup() {
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Serial.begin(115200);
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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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multi.addAP(ssid, password);
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if (multi.run() != WL_CONNECTED) {
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Serial.println("Unable to connect to network, rebooting in 10 seconds...");
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delay(10000);
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rp2040.reboot();
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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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void loop() {
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static bool wait = false;
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Serial.print("connecting to ");
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Serial.print(host);
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Serial.print(':');
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Serial.println(port);
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// Use WiFiClient class to create TCP connections
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WiFiClient client;
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if (!client.connect(host, port)) {
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Serial.println("connection failed");
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delay(5000);
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return;
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}
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// This will send a string to the server
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Serial.println("sending data to server");
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if (client.connected()) {
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client.println("hello from ESP8266");
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}
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// wait for data to be available
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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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delay(60000);
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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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Serial.println("receiving from remote server");
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// not testing 'client.connected()' since we do not need to send data here
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while (client.available()) {
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char ch = static_cast<char>(client.read());
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Serial.print(ch);
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}
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// Close the connection
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Serial.println();
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Serial.println("closing connection");
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client.stop();
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if (wait) {
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delay(300000); // execute once every 5 minutes, don't flood remote service
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}
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wait = true;
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}
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