63 lines
2.2 KiB
C++
Executable file
63 lines
2.2 KiB
C++
Executable file
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#include <Arduino.h>
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#include <ESP8266WiFi.h>
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#include <ESP8266WiFiMulti.h>
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#include <ESP8266Influxdb.h>
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const char *INFLUXDB_HOST = "host_or_ip";
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const uint16_t INFLUXDB_PORT = 8086;
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const char *DATABASE = "dbname";
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const char *DB_USER = "dbuser";
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const char *DB_PASSWORD = "dbpassword";
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ESP8266WiFiMulti WiFiMulti;
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Influxdb influxdb(INFLUXDB_HOST, INFLUXDB_PORT);
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void setup() {
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Serial.begin(115200);
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WiFiMulti.addAP("SSID", "PASSWORD");
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while (WiFiMulti.run() != WL_CONNECTED) {
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delay(100);
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}
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Serial.println("Ready");
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influxdb.opendb(DATABASE, DB_USER, DB_PASSWORD);
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}
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void loop() {
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// Writing data with influxdb HTTP API
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// https://influxdb.com/docs/v0.9/guides/writing_data.html
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Serial.println("Writing data to host " + String(INFLUXDB_HOST) + ":" +
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INFLUXDB_PORT + "'s database=" + DATABASE);
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String data = "analog_read,method=HTTP_API,pin=A0 value=" + String(analogRead(A0));
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influxdb.write(data);
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Serial.println(influxdb.response() == DB_SUCCESS ? "HTTP write success"
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: "Writing failed");
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// Writing data using FIELD object
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// Create field object with measurment name=analog_read
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FIELD dataObj("analog_read");
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dataObj.addTag("method", "Field_object"); // Add method tag
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dataObj.addTag("pin", "A0"); // Add pin tag
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dataObj.addField("value", analogRead(A0)); // Add value field
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Serial.println(influxdb.write(dataObj) == DB_SUCCESS ? "Object write success"
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: "Writing failed");
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// Empty field object.
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dataObj.empty();
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// Querying Data
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// https://influxdb.com/docs/v0.9/query_language/query_syntax.html
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Serial.println("Querying data ........");
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String sql = "select * from analog_read order by time desc limit 2";
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if (influxdb.query(sql) == DB_SUCCESS) {
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while (influxdb.available()) {
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String line = influxdb.readStringUntil('\n');
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Serial.println(line);
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}
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}
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else
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Serial.println("Query Failed");
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delay(30000);
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}
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