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- #include <Arduino.h>
- #include <Wire.h>
- #include <ESP8266WiFi.h>
- #include <InfluxDb.h>
- #include <ESP8266WebServer.h>
- #include <ESP8266mDNS.h>
- #include <Adafruit_BME280.h>
- #include <SHT2x.h>
-
- const char* sensor_location = "SENSOR_NAME_GOES_HERE";
-
- const char* ssid = "YOUR_SSID_HERE";
- const char* password = "YOUR_PASS_HERE";
-
- #define INFLUXDB_HOST "INFLUX_DB_SERVER_IP_HERE"
- #define INFLUXDB_PORT 8086
- #define INFLUXDB_DATABASE "INFLUX_DB_DATABASE_NAME_HERE"
-
- #define SENSOR_HOSTNAME_PREFIX "ESP-"
-
- Influxdb influx(INFLUXDB_HOST, INFLUXDB_PORT);
- ESP8266WebServer server(80);
- TwoWire Wire2;
- SHT2x sht(HTDU21D_ADDRESS, &Wire2);
- Adafruit_BME280 bme;
- bool found_bme = false;
- bool found_sht = false;
-
- void handleRoot() {
- String message = "ESP8266 BME280 Sensor";
- message += "\n\nLocation: ";
- message += sensor_location;
- message += "\nMAC: ";
- message += WiFi.macAddress();
-
- if (found_bme) {
- message += "\n\nBME280:";
- message += "\nTemperature: ";
- message += String(bme.readTemperature());
- message += "\nHumidity: ";
- message += String(bme.readHumidity());
- message += "\nPressure: ";
- message += String(bme.readPressure());
- }
-
- if (found_sht) {
- message += "\n\nSHT21:";
- message += "\nTemperature: ";
- message += String(sht.GetTemperature());
- message += "\nHumidity: ";
- message += String(sht.GetHumidity());
- }
-
- if ((!found_bme) && (!found_sht)) {
- message += "\n\nNo Sensor available!";
- }
-
- message += "\n";
- server.send(200, "text/plain", message);
- }
-
- void setup() {
- pinMode(1, OUTPUT);
- digitalWrite(1, LOW); // LED on
- delay(500);
- digitalWrite(1, HIGH); // LED off
- delay(500);
- digitalWrite(1, LOW); // LED on
- delay(500);
- digitalWrite(1, HIGH); // LED off
- delay(500);
-
- Wire2.begin(2, 0);
- found_bme = (!bme.begin(0x76, &Wire2)) ? false : true;
- found_sht = sht.GetAlive();
-
- if ((!found_bme) && (!found_sht)) {
- // no sensor available
- while (1) {
- digitalWrite(1, !digitalRead(1));
- delay(100);
- }
- }
-
- String hostname = SENSOR_HOSTNAME_PREFIX;
- hostname += sensor_location;
- WiFi.hostname(hostname);
-
- WiFi.mode(WIFI_STA);
- WiFi.begin(ssid, password);
-
- MDNS.begin(hostname);
-
- while (WiFi.status() != WL_CONNECTED) {
- delay(250);
- digitalWrite(1, !digitalRead(1));
- }
-
- influx.setDb(INFLUXDB_DATABASE);
-
- server.on("/", handleRoot);
- server.begin();
- }
-
- #define SERVER_HANDLE_INTERVAL 10 // in ms
- #define DB_WRITE_INTERVAL (30 * 1000) // in ms
- #define LED_BLINK_INTERVAL (2 * 1000) // in ms
-
- unsigned long last_server_handle_time = 0;
- unsigned long last_db_write_time = 0;
- unsigned long last_led_blink_time = 0;
-
- void loop() {
- unsigned long time = millis();
-
- if ((time - last_server_handle_time) >= SERVER_HANDLE_INTERVAL) {
- last_server_handle_time = time;
-
- server.handleClient();
- MDNS.update();
- }
-
- if ((time - last_db_write_time) >= DB_WRITE_INTERVAL) {
- last_db_write_time = time;
-
- if (found_bme) {
- InfluxData measurement("environment");
- measurement.addTag("location", sensor_location);
- measurement.addTag("device", WiFi.macAddress());
- measurement.addTag("sensor", "bme280");
-
- measurement.addValue("temperature", bme.readTemperature());
- measurement.addValue("pressure", bme.readPressure());
- measurement.addValue("humidity", bme.readHumidity());
-
- boolean success = influx.write(measurement);
- if (!success) {
- digitalWrite(1, !digitalRead(1));
- }
- }
-
- if (found_sht) {
- InfluxData measurement("environment");
- measurement.addTag("location", sensor_location);
- measurement.addTag("device", WiFi.macAddress());
- measurement.addTag("sensor", "sht21");
-
- measurement.addValue("temperature", sht.GetTemperature());
- measurement.addValue("humidity", sht.GetHumidity());
-
- boolean success = influx.write(measurement);
- if (!success) {
- digitalWrite(1, !digitalRead(1));
- }
- }
- }
-
- if ((time - last_led_blink_time) >= LED_BLINK_INTERVAL) {
- last_led_blink_time = time;
-
- digitalWrite(1, !digitalRead(1));
- }
- }
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