diff --git a/client/cmdhw.c b/client/cmdhw.c
index 8f7243ada..230ebfa3d 100644
--- a/client/cmdhw.c
+++ b/client/cmdhw.c
@@ -405,11 +405,17 @@ int CmdTune(const char *Cmd)
 
 int CmdVersion(const char *Cmd)
 {
-
-	clearCommandBuffer();
 	UsbCommand c = {CMD_VERSION};
 	static UsbCommand resp = {0, {0, 0, 0}};
 
+	if(*Cmd == 'n') {
+		PrintAndLog("Version Cache Cleared");
+		PrintAndLog("");
+		memset( &resp, 0, sizeof(resp) );
+	}
+
+	clearCommandBuffer();
+
 	if (resp.arg[0] == 0 && resp.arg[1] == 0) { // no cached information available
 		SendCommand(&c);
 		if (WaitForResponseTimeout(CMD_ACK,&resp,1000)) {
@@ -468,7 +474,7 @@ static command_t CommandTable[] =
 	{"setlfdivisor",  CmdSetDivisor,  0, "<19 - 255> -- Drive LF antenna at 12Mhz/(divisor+1)"},
 	{"setmux",        CmdSetMux,      0, "<loraw|hiraw|lopkd|hipkd> -- Set the ADC mux to a specific value"},
 	{"tune",          CmdTune,        0, "['l'|'h'] -- Measure antenna tuning (option 'l' or 'h' to limit to LF or HF)"},
-	{"version",       CmdVersion,     0, "Show version information about the connected Proxmark"},
+	{"version",       CmdVersion,     0, "['n'] -- Show version information about the connected Proxmark (option 'nocache' to force getting version from hardware)"},
 	{"status",        CmdStatus,      0, "Show runtime status information about the connected Proxmark"},
 	{"ping",          CmdPing,        0, "Test if the pm3 is responsive"},
 	{NULL, NULL, 0, NULL}
diff --git a/client/proxmark3.c b/client/proxmark3.c
index 99ba9fbad..2625ed5af 100644
--- a/client/proxmark3.c
+++ b/client/proxmark3.c
@@ -38,6 +38,7 @@
 pthread_mutex_t print_lock;
 
 static serial_port sp;
+static char* sp_name;
 static UsbCommand txcmd;
 volatile static bool txcmd_pending = false;
 
@@ -70,16 +71,52 @@ byte_t* prx = rx;
 static void *uart_receiver(void *targ) {
 	struct receiver_arg *arg = (struct receiver_arg*)targ;
 	size_t rxlen;
+	bool need_reconnect = false;
 
 	while (arg->run) {
-		rxlen = 0;
-		if (uart_receive(sp, prx, sizeof(UsbCommand) - (prx-rx), &rxlen) && rxlen) {
-			prx += rxlen;
-			if (prx-rx < sizeof(UsbCommand)) {
+		if( need_reconnect ) {
+			sp = uart_open(sp_name);
+
+			if( sp == INVALID_SERIAL_PORT || sp == CLAIMED_SERIAL_PORT )
+			{
+				//PrintAndLog("Reconnect failed, retrying...");
+
+				if( txcmd_pending ) {
+					PrintAndLog("Cannot send bytes to offline proxmark");
+					txcmd_pending = false;
+				}
+
+				sleep(1);
 				continue;
 			}
-			UsbCommandReceived((UsbCommand*)rx);
+
+			PrintAndLog("Proxmark reconnected!");
+			need_reconnect = false;
+			offline = 0;
+			clearCommandBuffer();
+		}
+
+		rxlen = 0;
+		if (uart_receive(sp, prx, sizeof(UsbCommand) - (prx-rx), &rxlen) ) {
+			if( rxlen ) {
+				prx += rxlen;
+				if (prx-rx < sizeof(UsbCommand)) {
+					continue;
+				}
+
+				UsbCommandReceived((UsbCommand*)rx);
+			}
 		}
+		else {
+			PrintAndLog("Receiving data from proxmark failed, attempting a reconnect");
+			uart_close(sp);
+			sp = INVALID_SERIAL_PORT;
+			offline = 1;
+			txcmd_pending = false;
+			need_reconnect = true;
+			continue;
+		}
+
 		prx = rx;
 
 		if(txcmd_pending) {
@@ -106,7 +143,7 @@ void main_loop(char *script_cmds_file, char *script_cmd, bool usb_present) {
 		rarg.run = 1;
 		pthread_create(&reader_thread, NULL, &uart_receiver, &rarg);
 		// cache Version information now:
-		CmdVersion(NULL);
+		CmdVersion("nocache");
 	}
 
 	// file with script
@@ -351,6 +388,7 @@ int main(int argc, char* argv[]) {
 	set_my_executable_path();
 	
 	// open uart
+	sp_name = argv[1];
 	if (!waitCOMPort) {
 		sp = uart_open(argv[1]);
 	} else {
@@ -405,7 +443,7 @@ int main(int argc, char* argv[]) {
 #endif	
 
 	// Clean up the port
-	if (usb_present) {
+	if (sp != INVALID_SERIAL_PORT && sp != CLAIMED_SERIAL_PORT) {
 		uart_close(sp);
 	}
 
diff --git a/uart/uart_posix.c b/uart/uart_posix.c
index 45e0d3d24..59b12956a 100644
--- a/uart/uart_posix.c
+++ b/uart/uart_posix.c
@@ -141,7 +141,7 @@ bool uart_receive(const serial_port sp, byte_t* pbtRx, size_t pszMaxRxLen, size_
   
   // Reset the output count
   *pszRxLen = 0;
-  
+
   do {
     // Reset file descriptor
     FD_ZERO(&rfds);
@@ -153,12 +153,12 @@ bool uart_receive(const serial_port sp, byte_t* pbtRx, size_t pszMaxRxLen, size_
     if (res < 0) {
       return false;
     }
- 
+
     // Read time-out
     if (res == 0) {
       if (*pszRxLen == 0) {
         // Error, we received no data
-        return false;
+        return true;
       } else {
         // We received some data, but nothing more is available
         return true;
@@ -168,7 +168,7 @@ bool uart_receive(const serial_port sp, byte_t* pbtRx, size_t pszMaxRxLen, size_
     // Retrieve the count of the incoming bytes
     res = ioctl(((serial_port_unix*)sp)->fd, FIONREAD, &byteCount);
     if (res < 0) return false;
-    
+
     // Cap the number of bytes, so we don't overrun the buffer
     if (pszMaxRxLen - (*pszRxLen) < byteCount) {
     	byteCount = pszMaxRxLen - (*pszRxLen);
@@ -178,8 +178,8 @@ bool uart_receive(const serial_port sp, byte_t* pbtRx, size_t pszMaxRxLen, size_
     res = read(((serial_port_unix*)sp)->fd, pbtRx+(*pszRxLen), byteCount);
 
     // Stop if the OS has some troubles reading the data
-    if (res <= 0) return false;
- 
+    if (res < 0) return false;
+
     *pszRxLen += res;
 
     if (*pszRxLen == pszMaxRxLen) {