added a basicwrite example like a PlatformIO project for test with CI

Author: hpsaturn

examples/PlatformIO_BasicWrite/platformio.ini

@@ -0,0 +1,16 @@
+; PlatformIO Project Configuration File
+;
+;   Build options: build flags, source filter
+;   Upload options: custom upload port, speed and extra flags
+;   Library options: dependencies, extra library storages
+;   Advanced options: extra scripting
+;
+; Please visit documentation for the other options and examples
+; https://docs.platformio.org/page/projectconf.html
+
+[env:esp32dev]
+platform = espressif32
+board = esp32dev
+framework = arduino
+lib_deps =
+  tobiasschuerg/ESP8266 Influxdb @ 3.9.0

examples/PlatformIO_BasicWrite/src/main.cpp

@@ -0,0 +1,98 @@
+/**
+ * Basic Write Example code for InfluxDBClient library for Arduino
+ * Data can be immediately seen in a InfluxDB UI: wifi_status measurement
+ * Enter WiFi and InfluxDB parameters below
+ *
+ * Measures signal level of the actually connected WiFi network
+ * This example supports only InfluxDB running from unsecure (http://...)
+ * For secure (https://...) or Influx Cloud 2 use SecureWrite example
+ **/
+
+#if defined(ESP32)
+#include <WiFiMulti.h>
+WiFiMulti wifiMulti;
+#define DEVICE "ESP32"
+#elif defined(ESP8266)
+#include <ESP8266WiFiMulti.h>
+ESP8266WiFiMulti wifiMulti;
+#define DEVICE "ESP8266"
+#endif
+
+#include <InfluxDbClient.h>
+
+// WiFi AP SSID
+#define WIFI_SSID "ssid"
+// WiFi password
+#define WIFI_PASSWORD "password"
+// InfluxDB  server url. Don't use localhost, always server name or ip address.
+// E.g. http://192.168.1.48:8086 (In InfluxDB 2 UI -> Load Data -> Client Libraries), 
+#define INFLUXDB_URL "influxdb-url"
+// InfluxDB 2 server or cloud API authentication token (Use: InfluxDB UI -> Load Data -> Tokens -> <select token>)
+#define INFLUXDB_TOKEN "toked-id"
+// InfluxDB 2 organization id (Use: InfluxDB UI -> Settings -> Profile -> <name under tile> )
+#define INFLUXDB_ORG "org"
+// InfluxDB 2 bucket name (Use: InfluxDB UI -> Load Data -> Buckets)
+#define INFLUXDB_BUCKET "bucket"
+// InfluxDB v1 database name 
+//#define INFLUXDB_DB_NAME "database"
+
+// InfluxDB client instance
+InfluxDBClient client(INFLUXDB_URL, INFLUXDB_ORG, INFLUXDB_BUCKET, INFLUXDB_TOKEN);
+// InfluxDB client instance for InfluxDB 1
+//InfluxDBClient client(INFLUXDB_URL, INFLUXDB_DB_NAME);
+
+// Data point
+Point sensor("wifi_status");
+
+void setup() {
+  Serial.begin(115200);
+
+  // Connect WiFi
+  Serial.println("Connecting to WiFi");
+  WiFi.mode(WIFI_STA);
+  wifiMulti.addAP(WIFI_SSID, WIFI_PASSWORD);
+  while (wifiMulti.run() != WL_CONNECTED) {
+    Serial.print(".");
+    delay(500);
+  }
+  Serial.println();
+
+  // Set InfluxDB 1 authentication params
+  //client.setConnectionParamsV1(INFLUXDB_URL, INFLUXDB_DB_NAME, INFLUXDB_USER, INFLUXDB_PASSWORD);
+
+  // Add constant tags - only once
+  sensor.addTag("device", DEVICE);
+  sensor.addTag("SSID", WiFi.SSID());
+
+  // Check server connection
+  if (client.validateConnection()) {
+    Serial.print("Connected to InfluxDB: ");
+    Serial.println(client.getServerUrl());
+  } else {
+    Serial.print("InfluxDB connection failed: ");
+    Serial.println(client.getLastErrorMessage());
+  }
+}
+
+void loop() {
+  // Store measured value into point
+  sensor.clearFields();
+  // Report RSSI of currently connected network
+  sensor.addField("rssi", WiFi.RSSI());
+  // Print what are we exactly writing
+  Serial.print("Writing: ");
+  Serial.println(client.pointToLineProtocol(sensor));
+  // If no Wifi signal, try to reconnect it
+  if (wifiMulti.run() != WL_CONNECTED) {
+    Serial.println("Wifi connection lost");
+  }
+  // Write point
+  if (!client.writePoint(sensor)) {
+    Serial.print("InfluxDB write failed: ");
+    Serial.println(client.getLastErrorMessage());
+  }
+
+  //Wait 10s
+  Serial.println("Wait 10s");
+  delay(10000);
+}