Cell - Enable modem

Source/Meadow.Contracts/Enums/CellModemType.cs

@@ -0,0 +1,20 @@
+namespace Meadow;
+
+/// <summary>
+/// Type of Cell Modem.
+/// </summary>
+public enum CellModemType
+{
+    /// <summary>
+    /// LTE cell modem BG95 manufactured by Quectel
+    /// </summary>
+    Bg95,
+    /// <summary>
+    /// GSM cell modem M95 manufactured by Quectel
+    /// </summary>
+    M95,
+    /// <summary>
+    /// LTE cell modem EG21BL manufactured by Quectel
+    /// </summary>
+    Eg21gl,
+};

Source/Meadow.Contracts/Hardware/Networking/ICellNetworkAdapter.cs

@@ -61,4 +61,11 @@ public interface ICellNetworkAdapter : INetworkAdapter
     /// <param name="timeout">The GNSS scan timeout duration in seconds.</param>
     /// <returns>A string containing combined output from GNSS-related AT commands, including NMEA sentences.</returns>
     string FetchGnssAtCmdsOutput(IGnssResult[] resultTypes, int timeout = gnssFixTimeoutInSeconds);
+
+    /// <summary>
+    /// Enable the modem to communicate through serial (COM1 or COM4).
+    /// </summary>
+    /// <param name="pin"> Output pin connected to PWRKEY.</param>
+    /// <param name="modem">The type of modem model ported. </param>
+    public void EnableModem(IPin pin, CellModemType modem);
 }