Added querying packet buffer state as KISS command

Config.h

@@ -4,7 +4,7 @@
 	#define CONFIG_H
 
 	#define MAJ_VERS  0x01
-	#define MIN_VERS  0x0B
+	#define MIN_VERS  0x0C
 
 	#define MCU_328P  0x90
 	#define MCU_1284P 0x91

RNode_Firmware.ino

@@ -468,6 +468,12 @@ void serialCallback(uint8_t sbyte) {
         promisc_disable();
       }
       kiss_indicate_promisc();
+    } else if (command == CMD_READY) {
+      if (!queueFull()) {
+        kiss_indicate_ready();
+      } else {
+        kiss_indicate_not_ready();
+      }
     } else if (command == CMD_UNLOCK_ROM) {
       if (sbyte == ROM_UNLOCK_BYTE) {
         unlock_rom();

Utilities.h

@@ -207,6 +207,13 @@ void kiss_indicate_ready() {
 	Serial.write(FEND);
 }
 
+void kiss_indicate_not_ready() {
+	Serial.write(FEND);
+	Serial.write(CMD_READY);
+	Serial.write(0x00);
+	Serial.write(FEND);
+}
+
 void kiss_indicate_promisc() {
 	Serial.write(FEND);
 	Serial.write(CMD_PROMISC);