Merge pull request #4 from jotzt/master

InfluxDb authentication support

InfluxDb.cpp

@@ -29,8 +29,18 @@ void Influxdb::setDb(String db) {
   http.addHeader("Content-Type", "text/plain");
 }
 
-// TODO: set db with user & password
-
+/**
+ * Set the database to be used with authentication.
+ */
+void Influxdb::setDbAuth(String db, String user, String pass) {
+  _db = String(db);
+  _user = user;
+  _pass = pass;
+  // TODO: recreate client on db change
+  // http = new HTTPClient();
+  http.begin(_host, _port, "/write?u=" + _user + "&p=" + _pass + "&db=" + _db );
+  http.addHeader("Content-Type", "text/plain");
+}
 /**
  * Prepare a measurement to be sent.
  */

InfluxDb.h

@@ -18,6 +18,8 @@ class Influxdb {
 
   void setDb(String db);
 
+  void setDbAuth(String db, String user, String pass);
+
   void prepare(InfluxData data);
   boolean write();
 
@@ -29,5 +31,7 @@ class Influxdb {
   String _host;
   uint16_t _port;
   String _db;
+  String _user;
+  String _pass;
   std::list<InfluxData> prepared;
-};
+};

README.md

@@ -7,6 +7,9 @@ Library for NodeMcu / ESP8266 (and Arduino?) for sending measurements to an Infl
  #define INFLUXDB_HOST "192.168.0.32"
  #define INFLUXDB_PORT "1337"
  #define INFLUXDB_DATABASE "test"
+ //if used with authentication
+ #define INFLUXDB_USER "user"
+ #define INFLUXDB_PASS "password"
 
  // TODO: connect to WiFi
 
@@ -16,6 +19,8 @@ Library for NodeMcu / ESP8266 (and Arduino?) for sending measurements to an Infl
 
  // set the target database
  influx.setDb(INFLUXDB_DATABASE);
+ // or 
+ influx.setDbAuth(INFLUXDB_DATABASE, INFLUXDB_USER, INFLUXDB_PASS) // with authentication
 ```
 
 ## Sending a single measurement

example/Writing_Single_with_Auth/Writing_Single_with_Auth.ino

@@ -0,0 +1,50 @@
+
+#include <ESP8266WiFi.h>
+#include <ESP8266WiFiMulti.h>
+#include <InfluxDb.h>
+
+#define INFLUXDB_HOST "192.168.0.32"
+#define INFLUXDB_USER "xxx"
+#define INFLUXDB_PASS "xxx"
+#define WIFI_SSID "xxx"
+#define WIFI_PASS "xxx"
+
+ESP8266WiFiMulti WiFiMulti;
+Influxdb influx(INFLUXDB_HOST);
+
+void setup() {
+  Serial.begin(9600);
+  Serial.println(" ### Hello ###");
+
+  WiFiMulti.addAP(WIFI_SSID, WIFI_PASS);
+  Serial.print("Connecting to WIFI");
+  while (WiFiMulti.run() != WL_CONNECTED) {
+    Serial.print(".");
+    delay(100);
+  }
+  Serial.println("WiFi connected");
+  Serial.println("IP address: ");
+  Serial.println(WiFi.localIP());
+
+  influx.setDbAuth("test", INFLUXDB_USER, INFLUXDB_PASS);
+
+  Serial.println("Setup done");
+}
+
+
+int loopCount = 0;
+
+void loop() {
+  loopCount++;
+
+  InfluxData row("temperature");
+  row.addTag("device", "alpha");
+  row.addTag("sensor", "one");
+  row.addTag("mode", "pwm");
+  row.addValue("loopCount", loopCount);
+  row.addValue("value", random(10, 40));
+
+  influx.write(row);
+
+  delay(5000);
+}