154 lines
3.5 KiB
C++
154 lines
3.5 KiB
C++
/*
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* ModularWeatherStation
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*
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* Copyright (C) 2021 Gergely Polonkai
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* Author: Gergely POLONKAI <gergely@polonkai.eu>
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*
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* ModularWeatherStation is free software: you can redistribute it
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* and/or modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation, either version 3 of
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* the License, or (at your option) any later version.
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*
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* ModularWeatherStation is distributed in the hope that it will be
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* useful, but WITHOUT ANY WARRANTY; without even the implied warranty
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* of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*
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* As additional permission under GNU GPL version 3 section 7, you may
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* distribute non-source form of the Program without the copy of the
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* GNU GPL normally required by section 4, provided you inform the
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* receipents of GNU GPL by a written offer.
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*
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*/
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#include <ESP8266WiFi.h>
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#include <WiFiClient.h>
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#include <ESP8266mDNS.h>
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#include <ESP8266WebServer.h>
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#include "config.h"
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#ifdef DHT_TYPE
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# include <DHT.h>
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#endif // DHT_TYPE
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ESP8266WebServer server(80);
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unsigned long last_update = 0;
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#ifdef DHT_TYPE
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DHT dht(DHT_PIN, DHT_TYPE);
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float temperature = 0.0;
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float humidity = 0.0;
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#endif // DHT_TYPE
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static const char TEXT_PLAIN[] PROGMEM = "text/plain";
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void
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reply_not_found()
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{
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server.send(404, FPSTR(TEXT_PLAIN), "Not Found");
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}
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void
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send_metrics()
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{
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static const size_t dht_size = 228;
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char message[dht_size + 1];
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size_t message_size =
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#ifdef DHT_TYPE
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dht_size +
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#endif // DHT_TYPE
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1;
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snprintf(message, message_size,
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#ifdef DHT_TYPE
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"# HELP temperature_celsius Temperature in degrees Celsius\n"
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"# TYPE temperature_celsius gauge\n"
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"temperature_celsius %.2f\n"
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"# HELP relative_humidity Relative humidity, in percents\n"
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"# TYPE relative_humidity gauge\n"
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"relative_humidity %.2f\n",
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temperature, humidity
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#endif // DHT_TYPE
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);
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server.send(200, "text/plain; version=0.0.4; charset=utf-8", message);
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}
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void
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setup()
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{
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IPAddress address;
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Serial.begin(9600);
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WiFi.mode(WIFI_STA);
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WiFi.begin(WIFI_SSID, WIFI_PASS);
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while (WiFi.status() != WL_CONNECTED) {
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delay(500);
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Serial.println("Waiting for WiFi to connect...");
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}
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address = WiFi.localIP();
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Serial.print("WiFi Address: ");
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address.printTo(Serial);
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Serial.println("");
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if (!MDNS.begin(MDNS_NAME)) {
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Serial.println("Error setting up mDNS responder!");
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while (1) {
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delay(1000);
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}
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}
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server.on("/metrics", HTTP_GET, send_metrics);
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server.onNotFound(reply_not_found);
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server.begin();
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MDNS.addService("http", "tcp", 80);
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// Initialize sensors
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#ifdef DHT_TYPE
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dht.begin();
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#endif // DHT_TYPE
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Serial.println("All set, starting the loop.");
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}
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void
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read_sensors()
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{
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// Turn on the LED to indicate that we’re working
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digitalWrite(LED_BUILTIN, LOW);
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#ifdef DHT_TYPE
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temperature = dht.readTemperature();
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humidity = dht.readHumidity();
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#endif
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// Turn off the LED to indicate work is finished
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digitalWrite(LED_BUILTIN, HIGH);
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}
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void
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loop()
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{
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unsigned long now = millis();
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MDNS.update();
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server.handleClient();
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if (now - last_update >= 5000) {
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read_sensors();
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last_update = now;
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}
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}
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