esp8266_influxdb.ino

#include <Arduino.h>
#include <ESP8266WiFi.h>
#include <ESP8266WiFiMulti.h>
#include <ESP8266HTTPClient.h>
#include <WiFiClient.h>

#define SSID "your-ssid"
#define PASSWORD "your-passwd"

#define INFLUXDB_URL "http://localhost:8086/api/v2/write?org=your-org&bucket=your-bucket"
#define INFLUXDB_TOKEN "Token akKEWNFwjbfalwkejfk-your-token-awlejhfklwjaehfkljawhefkhKLHWEUbkjwae=="


ESP8266WiFiMulti WiFiMulti;

void setup() {
  Serial.begin(9600);

  Serial.println();
  Serial.println();
  Serial.println();

  for (uint8_t t = 4; t > 0; t--) {
    Serial.printf("[SETUP] WAIT %d...\n", t);
    Serial.flush();
    delay(1000);
  }

  WiFi.mode(WIFI_STA);
  WiFiMulti.addAP(SSID, PASSWORD);
}

void loop() {
  // wait for WiFi connection
  if ((WiFiMulti.run() == WL_CONNECTED)) {

    WiFiClient client;

    HTTPClient http;

    Serial.print("[HTTP] begin...\n");
    if (http.begin(client, INFLUXDB_URL)) {  // HTTP
      http.addHeader("Content-Type", "application/vnd.flux");
      http.addHeader("Accept", "application/csv");
      http.addHeader("Authorization", INFLUXDB_TOKEN);

      Serial.print("[HTTP] GET...\n");
      // start connection and send HTTP header
      int httpCode = http.POST("weather,sensor=bmp180 temperature=25.5,pressure=101111.10");

      // httpCode will be negative on error
      if (httpCode > 0) {
        // HTTP header has been send and Server response header has been handled
        Serial.printf("[HTTP] GET... code: %d\n", httpCode);
        http.writeToStream(&Serial);

        // file found at server
        if (httpCode == HTTP_CODE_OK || httpCode == HTTP_CODE_MOVED_PERMANENTLY) {
          String payload = http.getString();
          Serial.println(payload);
        }
      } else {
        Serial.printf("[HTTP] GET... failed, error: %s\n", http.errorToString(httpCode).c_str());
      }

      http.end();
    } else {
      Serial.println("[HTTP] Unable to connect");
    }
  }

  delay(10000);
}