Implement DAL, basic models created, ability to write back to database.

Public API/Server/Controllers/APIController.cs

+using Microsoft.AspNetCore.Mvc;
+using Public_API.Server.DAL;
+using Public_API.Shared.Models;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Threading.Tasks;
+
+// For more information on enabling Web API for empty projects, visit https://go.microsoft.com/fwlink/?LinkID=397860
+
+namespace Public_API.Server.Controllers
+{
+    [Route("[controller]")]
+    [ApiController]
+    public class APIController : ControllerBase
+    {
+
+        ApiContext db = new ApiContext();
+
+        // GET: api/<APIController>
+        [HttpGet]
+        public IEnumerable<string> Get()
+        {
+            return new string[] { "value1", "value2" };
+        }
+
+        // GET api/sensor/logValue/...
+        [HttpGet("sensor/logValue/{sensorID}/{temperature}/{humidity}/{co2}/{ppm25}")]
+        public string Get(int sensorID, string temperature, string humidity, string co2, string ppm25)
+        {
+            // TODO Error Handling!
+            SensorValue sensorValue = new SensorValue(sensorID, decimal.Parse(temperature), decimal.Parse(humidity), decimal.Parse(co2), decimal.Parse(ppm25));
+
+            db.SensorValue.Add(sensorValue);
+            db.SaveChanges();
+
+            return "Got value from " + sensorID + ". Sorted with ID " + sensorValue.valueID;
+        }
+
+
+
+        // POST api/<APIController>
+        [HttpPost]
+        public void Post([FromBody] string value)
+        {
+        }
+
+        // PUT api/<APIController>/5
+        [HttpPut("{id}")]
+        public void Put(int id, [FromBody] string value)
+        {
+        }
+
+        // DELETE api/<APIController>/5
+        [HttpDelete("{id}")]
+        public void Delete(int id)
+        {
+        }
+    }
+}

Public API/Server/DAL/ApiContext.cs

+using Microsoft.EntityFrameworkCore;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Threading.Tasks;
+using Public_API.Shared.Models;
+
+namespace Public_API.Server.DAL
+{
+    public class ApiContext : DbContext
+    {
+        public DbSet<Sensor> Sensor { get; set; } 
+        public DbSet<SensorValue> SensorValue { get; set; }
+
+        protected override void OnModelCreating(ModelBuilder modelBuilder)
+        {
+            base.OnModelCreating(modelBuilder);
+        }
+
+        protected override void OnConfiguring(DbContextOptionsBuilder optionsBuilder)
+        {
+            optionsBuilder.UseSqlServer("Data Source=PC-RYZEN-7\\SQLEXPRESS;Initial Catalog=EnviromentalMonitoring;Integrated Security=True");
+        
+            // TODO @Callum Setup model precision
+        }
+
+    }
+}

Public API/Shared/Models/Tables/Sensor.cs

+using System;
+using System.Collections.Generic;
+using System.ComponentModel.DataAnnotations;
+using System.Text;
+
+namespace Public_API.Shared.Models
+{
+    public class Sensor
+    {
+        [Key]
+        public int sensorID { get; set; }
+        public decimal locationLong { get; set; }
+        public decimal locationLat { get; set; }
+        public string locationCity { get; set; }
+        public string friendlyName { get; set; }
+    }
+}

Public API/Shared/Models/Tables/SensorValue.cs

+using System;
+using System.Collections.Generic;
+using System.ComponentModel.DataAnnotations;
+using System.Text;
+
+namespace Public_API.Shared.Models
+{
+    public class SensorValue
+    {
+        [Key]
+        public int valueID { get; set; }
+        public DateTime dateTime { get; set; }
+        public int sensorID { get; set; }
+        public decimal temperature { get; set; }
+        public decimal humidity { get; set; }
+        public decimal co2 { get; set; }
+        public decimal ppm25 { get; set; }
+
+        public SensorValue(int sensorID, decimal temperature, decimal humidity, decimal co2, decimal ppm25)
+        {
+            this.sensorID = sensorID;
+            this.temperature = temperature;
+            this.humidity = humidity;
+            this.co2 = co2;
+            this.ppm25 = ppm25;
+
+            this.dateTime = DateTime.Now;
+        }
+    }
+}

Public API/Shared/SQL/1. CREATE TABLES.sql

+USE [EnviromentalMonitoring]
+GO
+
+/****** Object:  Table [dbo].[Sensor]    Script Date: 19/10/2021 16:22:46 ******/
+SET ANSI_NULLS ON
+GO
+
+SET QUOTED_IDENTIFIER ON
+GO
+
+CREATE TABLE [dbo].[Sensor](
+	[sensorID] [int] IDENTITY(1,1) NOT NULL,
+	[locationLong] decimal(11, 8) NOT NULL,
+	[locationLat] decimal(11, 8) NOT NULL,
+	[locationCity] decimal(11, 8) NOT NULL,
+	[friendlyName] [nvarchar](50) NULL
+) ON [PRIMARY]
+GO
+
+CREATE TABLE [dbo].[SensorValue](
+	[valueID] [int] IDENTITY(1,1) NOT NULL,
+	[dateTime] [datetime] NOT NULL,
+	[sensorID] [int] NOT NULL,
+	[temperature] [decimal](14, 4) NULL,
+	[humidity] [decimal](14, 4) NULL,
+	[co2] [decimal](14, 4) NULL,
+	[ppm25] [decimal](14, 4) NULL
+) ON [PRIMARY]
+GO
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