Add support for multiple light bars/remotes (#3), bump to version 0.2

constants.h

@@ -0,0 +1,32 @@
+#ifndef CONSTANTS_H
+#define CONSTANTS_H
+
+#include <stdint.h>
+#include <Arduino.h>
+
+namespace constants
+{
+    // The version number of lightbar2mqtt.
+    const String VERSION = "0.2";
+
+    // The maximum number of light bars that can be connected to the controller.
+    const uint8_t MAX_LIGHTBARS = 10;
+
+    // The maximum number of remotes that can be connected to the controller.
+    const uint8_t MAX_REMOTES = 10;
+
+    // The maximum number of serials, the controller will be able to save latest package ids for.
+    // This should always >= MAX_REMOTES + MAX_LIGHTBARS.
+    const uint8_t MAX_SERIALS = 32;
+
+    // The maximum number of command listeners that can be registered for a remote.
+    const uint8_t MAX_COMMAND_LISTENERS = 10;
+};
+
+struct SerialWithName
+{
+    uint32_t serial;
+    const char *name;
+};
+
+#endif