First functioning draft

InfluxDataService.cs

@@ -0,0 +1,54 @@
+using System;
+using System.Linq;
+using System.Threading.Tasks;
+using InfluxDB.Client;
+
+public class InfluxDataService
+{
+    private readonly string _url;
+    private readonly string _token;
+    private readonly string _org;
+    private readonly string _bucket;
+
+    public InfluxDataService(string url, string token, string org, string bucket)
+    {
+        _url = url;
+        _token = token;
+        _org = org;
+        _bucket = bucket;
+    }
+
+    public async Task<float> GetLatestTemperatureAsync()
+    {
+        // Connect to the InfluxDB container
+        using var client = new InfluxDBClient(_url, _token);
+        var queryApi = client.GetQueryApi();
+
+        // This is a standard Flux query to get the last recorded value in the last 15 mins.
+        // You will need to change "_measurement" and "_field" to match your setup.
+        string flux = $@"
+            from(bucket: ""{_bucket}"")
+              |> range(start: -15m)
+              |> filter(fn: (r) => r[""_measurement""] == ""LoRa_Test_DB_2"") 
+              |> filter(fn: (r) => r[""_field""] == ""temperature"")
+              |> last()";
+
+        try
+        {
+            var tables = await queryApi.QueryAsync(flux, _org);
+
+            // Check if we actually got data back
+            if (tables != null && tables.Any() && tables[0].Records.Any())
+            {
+                var record = tables[0].Records[0];
+                return Convert.ToSingle(record.GetValue());
+            }
+        }
+        catch (Exception ex)
+        {
+            Console.WriteLine($"Error querying InfluxDB: {ex.Message}");
+        }
+
+        return 0f; // Fallback value if query fails or no data is found
+    }
+}