diff --git a/Makefile b/Makefile
index 32cce5cb..99d5617a 100644
--- a/Makefile
+++ b/Makefile
@@ -30,7 +30,7 @@ ESPBAUD		?= 460800
 # --------------- chipset configuration   ---------------
 
 # Pick your flash size: "512KB" or "4MB"
-FLASH_SIZE ?= 512KB
+FLASH_SIZE ?= 4MB
 
 ifeq ("$(FLASH_SIZE)","512KB")
 # Winbond 25Q40 512KB flash, typ for esp-01 thru esp-11
diff --git a/serial/serbridge.c b/serial/serbridge.c
index 449afbd8..c4306f76 100644
--- a/serial/serbridge.c
+++ b/serial/serbridge.c
@@ -457,9 +457,18 @@ static void ICACHE_FLASH_ATTR serbridgeConnectCb(void *arg) {
 void ICACHE_FLASH_ATTR serbridgeInitPins() {
 	mcu_reset_pin = flashConfig.reset_pin;
 	mcu_isp_pin = flashConfig.isp_pin;
-	os_printf("Serbridge pins: reset=%d isp=%d\n", mcu_reset_pin, mcu_isp_pin);
+	os_printf("Serbridge pins: reset=%d isp=%d swap=%d\n",
+			mcu_reset_pin, mcu_isp_pin, flashConfig.swap_uart);
 
-	if (flashConfig.swap_uart) system_uart_swap(); else system_uart_de_swap();
+	if (flashConfig.swap_uart) {
+		PIN_FUNC_SELECT(PERIPHS_IO_MUX_MTCK_U, 4);
+		PIN_FUNC_SELECT(PERIPHS_IO_MUX_MTDO_U, 4);
+		system_uart_swap();
+	} else {
+		PIN_FUNC_SELECT(PERIPHS_IO_MUX_U0TXD_U, 0);
+		PIN_FUNC_SELECT(PERIPHS_IO_MUX_U0RXD_U, 0);
+		system_uart_de_swap();
+	}
 
 	// set both pins to 1 before turning them on so we don't cause a reset
 	if (mcu_isp_pin >= 0)   GPIO_OUTPUT_SET(mcu_isp_pin, 1);
diff --git a/user/cgipins.c b/user/cgipins.c
index fd8b554f..2d718498 100644
--- a/user/cgipins.c
+++ b/user/cgipins.c
@@ -24,15 +24,13 @@ static const int num_map_func = sizeof(map_func)/sizeof(char*);
 
 // Cgi to return choice of pin assignments
 int ICACHE_FLASH_ATTR cgiPinsGet(HttpdConnData *connData) {
-	char buff[1024];
-  int len;
+	if (connData->conn==NULL) return HTTPD_CGI_DONE; // Connection aborted
 
-	if (connData->conn==NULL) {
-		return HTTPD_CGI_DONE; // Connection aborted
-	}
+	char buff[2048];
+  int len;
 
   // figure out current mapping
-  int curr = 99;
+  int curr = 0;
   for (int i=0; i<num_map_names; i++) {
     int8_t *map = map_asn[i];
     if (map[0] == flashConfig.reset_pin && map[1] == flashConfig.isp_pin &&
@@ -42,6 +40,7 @@ int ICACHE_FLASH_ATTR cgiPinsGet(HttpdConnData *connData) {
     }
   }
 
+  // print mapping
   len = os_sprintf(buff, "{ \"curr\":\"%s\", \"map\": [ ", map_names[curr]);
   for (int i=0; i<num_map_names; i++) {
     if (i != 0) buff[len++] = ',';
@@ -52,8 +51,12 @@ int ICACHE_FLASH_ATTR cgiPinsGet(HttpdConnData *connData) {
     len += os_sprintf(buff+len, ", \"descr\":\"");
     for (int f=0; f<num_map_func; f++) {
       int8_t p = map_asn[i][f];
-      if (p >= 0) len += os_sprintf(buff+len, " %s:gpio%d", map_func[f], p);
-      else len += os_sprintf(buff+len, " %s:n/a", map_func[f]);
+      if (f == 4)
+        len += os_sprintf(buff+len, " %s:%s", map_func[f], p?"yes":"no");
+      else if (p >= 0)
+        len += os_sprintf(buff+len, " %s:gpio%d", map_func[f], p);
+      else
+        len += os_sprintf(buff+len, " %s:n/a", map_func[f]);
     }
     len += os_sprintf(buff+len, "\" }");
   }
@@ -89,6 +92,7 @@ int ICACHE_FLASH_ATTR cgiPinsSet(HttpdConnData *connData) {
   flashConfig.isp_pin      = map[1];
   flashConfig.conn_led_pin = map[2];
   flashConfig.ser_led_pin  = map[3];
+  flashConfig.swap_uart    = map[4];
 
   serbridgeInitPins();
   serledInit();