diff --git a/serial/console.c b/serial/console.c
index ccd4144..d082036 100644
--- a/serial/console.c
+++ b/serial/console.c
@@ -87,19 +87,17 @@ ajaxConsoleFormat(HttpdConnData *connData) {
   if (connData->conn==NULL) return HTTPD_CGI_DONE; // Connection aborted. Clean up.
   char buff[16];
   int len, status = 400;
-  uint32 conf0;
 
   len = httpdFindArg(connData->getArgs, "fmt", buff, sizeof(buff));
   if (len >= 3) {
     int c = buff[0];
-    if (c >= '5' && c <= '8')
-       flashConfig.data_bits = c - '5' + FIVE_BITS;
-    if (buff[1] == 'N' || buff[1] == 'E')
-       flashConfig.parity = buff[1] == 'E' ? EVEN_BITS : NONE_BITS;
-    if (buff[2] == '1' || buff[2] == '2')
-       flashConfig.stop_bits = buff[2] == '2' ? TWO_STOP_BIT : ONE_STOP_BIT;
-    conf0 = CALC_UARTMODE(flashConfig.data_bits, flashConfig.parity, flashConfig.stop_bits);
-    uart_config(0, flashConfig.baud_rate, conf0);
+    if (c >= '5' && c <= '8') flashConfig.data_bits = c - '5' + FIVE_BITS;
+    if (buff[1] == 'N') flashConfig.parity = NONE_BITS;
+    if (buff[1] == 'E') flashConfig.parity = EVEN_BITS;
+    if (buff[1] == 'O') flashConfig.parity = ODD_BITS;
+    if (buff[2] == '1') flashConfig.stop_bits = ONE_STOP_BIT;
+    if (buff[2] == '2') flashConfig.stop_bits = TWO_STOP_BIT;
+    uart0_config(flashConfig.data_bits, flashConfig.parity, flashConfig.stop_bits);
     status = configSave() ? 200 : 400;
   } else if (connData->requestType == HTTPD_METHOD_GET) {
     status = 200;
diff --git a/serial/serbridge.c b/serial/serbridge.c
index 5d873e0..c6791b2 100644
--- a/serial/serbridge.c
+++ b/serial/serbridge.c
@@ -70,7 +70,7 @@ telnetUnwrap(serbridgeConnData *conn, uint8_t *inBuf, int len)
       else uart0_write_char(c);     // regular char
       break;
     case TN_iac:
-      os_printf("Telnet: IAC + %d\n", c);
+      //os_printf("Telnet: IAC + %d\n", c);
       switch (c) {
       case IAC:                     // second escape -> write one to outbuf and go normal again
         state = TN_normal;
@@ -118,13 +118,13 @@ telnetUnwrap(serbridgeConnData *conn, uint8_t *inBuf, int len)
       case DTR_ON:
         if (mcu_reset_pin >= 0) {
 #ifdef SERBR_DBG
-          os_printf("MCU reset gpio%d\n", mcu_reset_pin);
+          os_printf("Telnet: reset gpio%d\n", mcu_reset_pin);
 #endif
           GPIO_OUTPUT_SET(mcu_reset_pin, 0);
           os_delay_us(100L);
         }
 #ifdef SERBR_DBG
-        else { os_printf("MCU reset: no pin\n"); }
+        else { os_printf("Telnet: reset: no pin\n"); }
 #endif
         break;
       case DTR_OFF:
@@ -136,18 +136,21 @@ telnetUnwrap(serbridgeConnData *conn, uint8_t *inBuf, int len)
       case RTS_ON:
         if (mcu_isp_pin >= 0) {
 #ifdef SERBR_DBG
-          os_printf("MCU ISP gpio%d\n", mcu_isp_pin);
+          os_printf("Telnet: ISP gpio%d LOW\n", mcu_isp_pin);
 #endif
           GPIO_OUTPUT_SET(mcu_isp_pin, 0);
           os_delay_us(100L);
         }
 #ifdef SERBR_DBG
-        else { os_printf("MCU isp: no pin\n"); }
+        else { os_printf("Telnet: isp: no pin\n"); }
 #endif
         in_mcu_flashing++;
         break;
       case RTS_OFF:
         if (mcu_isp_pin >= 0) {
+#ifdef SERBR_DBG
+          os_printf("Telnet: ISP gpio%d HIGH\n", mcu_isp_pin);
+#endif
           GPIO_OUTPUT_SET(mcu_isp_pin, 1);
           os_delay_us(100L);
         }
@@ -159,9 +162,9 @@ telnetUnwrap(serbridgeConnData *conn, uint8_t *inBuf, int len)
     case TN_setDataSize:
       if (c >= 5 && c <= 8) {
         flashConfig.data_bits = c - 5 + FIVE_BITS;
-        uint32_t conf0 = CALC_UARTMODE(flashConfig.data_bits, flashConfig.parity, flashConfig.stop_bits);
-        uart_config(0, flashConfig.baud_rate, conf0);
+        uart0_config(flashConfig.data_bits, flashConfig.parity, flashConfig.stop_bits);
         configSave();
+        os_printf("Telnet: %d bits/char\n", c);
       } else if (c == 0) {
         // data size of zero means we need to send the current data size
         char respBuf[7] = { IAC, SB, ComPortOpt, SetDataSize,
@@ -179,6 +182,7 @@ telnetUnwrap(serbridgeConnData *conn, uint8_t *inBuf, int len)
           uart0_baud(tn_baud);
           flashConfig.baud_rate = tn_baud;
           configSave();
+          os_printf("Telnet: %d baud\n", tn_baud);
         } else if (tn_baud == 0) {
           // baud rate of zero means we need to send the baud rate
           uint32_t b = flashConfig.baud_rate;
@@ -202,9 +206,9 @@ telnetUnwrap(serbridgeConnData *conn, uint8_t *inBuf, int len)
       if (c == 2) parity = ODD_BITS;
       if (c == 3) parity = EVEN_BITS;
       flashConfig.parity = parity;
-      uint32_t conf0 = CALC_UARTMODE(flashConfig.data_bits, flashConfig.parity, flashConfig.stop_bits);
-      uart_config(0, flashConfig.baud_rate, conf0);
+      //uart0_config(flashConfig.data_bits, flashConfig.parity, flashConfig.stop_bits);
       configSave();
+      os_printf("Telnet: parity %s\n", c==2?"odd":c==3?"even":"none");
       state = TN_end;
       break;
     }
diff --git a/serial/uart.c b/serial/uart.c
index 92233a0..07642c3 100644
--- a/serial/uart.c
+++ b/serial/uart.c
@@ -256,6 +256,12 @@ uart0_baud(int rate) {
   uart_div_modify(UART0, UART_CLK_FREQ / rate);
 }
 
+void ICACHE_FLASH_ATTR
+uart0_config(uint8_t data_bits, uint8_t parity, uint8_t stop_bits) {
+  uint32_t conf0 = CALC_UARTMODE(data_bits, parity, stop_bits);
+  WRITE_PERI_REG(UART_CONF0(0), conf0);
+}
+
 /******************************************************************************
  * FunctionName : uart_init
  * Description  : user interface for init uart
diff --git a/serial/uart.h b/serial/uart.h
index d1469c6..f3fc2de 100644
--- a/serial/uart.h
+++ b/serial/uart.h
@@ -27,6 +27,7 @@ void uart_add_recv_cb(UartRecv_cb cb);
 uint16_t uart0_rx_poll(char *buff, uint16_t nchars, uint32_t timeout_us);
 
 void uart0_baud(int rate);
+void uart0_config(uint8_t data_bits, uint8_t parity, uint8_t stop_bits);
 void uart_config(uint8 uart_no, UartBautRate baudrate, uint32 conf0);
 
 #endif /* __UART_H__ */