diff --git a/doc/instrukcja_obslugi_instalacji_i_napraw.odt b/doc/instrukcja_obslugi_instalacji_i_napraw.odt
index dcc440c..0bd2b87 100644
Binary files a/doc/instrukcja_obslugi_instalacji_i_napraw.odt and b/doc/instrukcja_obslugi_instalacji_i_napraw.odt differ
diff --git a/src/main.c b/src/main.c
index 5e9d169..edc4f9f 100644
--- a/src/main.c
+++ b/src/main.c
@@ -43,6 +43,11 @@
 #include "aprs/wx.h"
 #include "drivers/gpio_conf.h"
 
+#ifdef _DAVIS_SERIAL
+#include "../system/include/davis_vantage/davis.h"
+#include "../system/include/davis_vantage/davis_parsers.h"
+#endif
+
 #ifdef _SENSOR_MS5611
 #include "drivers/ms5611.h"
 #endif
@@ -288,6 +293,25 @@ int main(int argc, char* argv[]){
   main_wx_srl_ctx_ptr->te_port = GPIOA;
 #endif
 
+#if (defined(PARATNC_HWREV_B) || defined(PARATNC_HWREV_C)) && defined(_DAVIS_SERIAL)
+  // reinitialize the KISS serial port temporary to davis baudrate
+  main_target_kiss_baudrate = DAVIS_DEFAULT_BAUDRATE;
+
+  // reset RX state to allow reinitialization with changed baudrate
+  main_kiss_srl_ctx_ptr->srl_rx_state = SRL_RX_NOT_CONFIG;
+
+  // reinitializing serial hardware
+  srl_init(main_kiss_srl_ctx_ptr, USART1, srl_usart1_rx_buffer, RX_BUFFER_1_LN, srl_usart1_tx_buffer, TX_BUFFER_1_LN, main_target_kiss_baudrate);
+
+  srl_switch_timeout(main_kiss_srl_ctx_ptr, SRL_TIMEOUT_ENABLE, 1500);
+
+  davis_init(main_kiss_srl_ctx_ptr);
+
+  davis_wake_up(1);
+
+#endif
+
+
   // configuring an APRS path used to transmit own packets (telemetry, wx, beacons)
   main_own_path_ln = ConfigPath(main_own_path);
 
diff --git a/system/include/davis_vantage/davis.h b/system/include/davis_vantage/davis.h
index 0262811..05a0e9b 100644
--- a/system/include/davis_vantage/davis.h
+++ b/system/include/davis_vantage/davis.h
@@ -12,6 +12,8 @@
 
 #include "davis_retval_def.h"
 
+#define DAVIS_DEFAULT_BAUDRATE 19200u
+
 uint32_t davis_init(srl_context_t* srl_port);
 uint32_t davis_wake_up(uint8_t is_io_blocking);
 uint32_t davis_do_test(void);
diff --git a/system/include/drivers/serial.h b/system/include/drivers/serial.h
index cc3b9ba..bf8165e 100644
--- a/system/include/drivers/serial.h
+++ b/system/include/drivers/serial.h
@@ -16,6 +16,9 @@
 
 #define SRL_DEFAULT_RX_TIMEOUT_IN_MS 400
 
+#define SRL_TIMEOUT_ENABLE	1
+#define SRL_TIMEOUT_DISABLE 0
+
 typedef enum srlRxState {
 	SRL_RX_NOT_CONFIG,
 	SRL_RX_IDLE,
@@ -116,6 +119,7 @@ void srl_wait_for_tx_completion(srl_context_t *ctx);
 uint8_t srl_wait_for_rx_completion_or_timeout(srl_context_t *ctx, uint8_t* output);
 void srl_irq_handler(srl_context_t *ctx);
 uint8_t srl_receive_data(srl_context_t *ctx, int num, char start, char stop, char echo, char len_addr, char len_modifier);
+uint8_t srl_receive_data_with_instant_timeout(srl_context_t *ctx, int num, char start, char stop, char echo, char len_addr, char len_modifier);
 uint16_t srl_get_num_bytes_rxed(srl_context_t *ctx);
 uint8_t* srl_get_rx_buffer(srl_context_t *ctx);
 void srl_keep_timeout(srl_context_t *ctx);
diff --git a/system/src/davis_vantage/davis.c b/system/src/davis_vantage/davis.c
index 98cac7e..a09cb9c 100644
--- a/system/src/davis_vantage/davis.c
+++ b/system/src/davis_vantage/davis.c
@@ -46,7 +46,7 @@ uint8_t davis_avaliable;
  */
 uint8_t davis_loop_avaliable;
 
-static const char line_feed[] = "\n";
+static const char line_feed = '\n';
 static const char line_feed_return[] = {'\n', '\r'};
 static const char loop_command[] = "LOOP 1\n";
 
@@ -82,7 +82,7 @@ uint32_t davis_wake_up(uint8_t is_io_blocking) {
 	int comparation_result = -1;
 
 	// sending the new line to wake up the console
-	srl_send_data(davis_serial_context, (uint8_t*)line_feed, 1, 1, 0);
+	srl_send_data(davis_serial_context, (uint8_t*)&line_feed, 1, 1, 0);
 
 	// check if a user want to have blocking I/O
 	if (is_io_blocking == 1) {
@@ -90,7 +90,7 @@ uint32_t davis_wake_up(uint8_t is_io_blocking) {
 		srl_wait_for_tx_completion(davis_serial_context);
 
 		// start waiting for console response
-		srl_receive_data(davis_serial_context, 2, 0, 0, 0, 0, 0);
+		srl_receive_data_with_instant_timeout(davis_serial_context, 2, 0, 0, 0, 0, 0);
 
 		// wait for station response or for timeout
 		srl_wait_for_rx_completion_or_timeout(davis_serial_context, ((uint8_t*)&retval));
@@ -110,7 +110,7 @@ uint32_t davis_wake_up(uint8_t is_io_blocking) {
 			// send the wake up command one more time
 
 			// sending the new line to wake up the console
-			srl_send_data(davis_serial_context, (uint8_t*)line_feed, 1, 1, 0);
+			srl_send_data(davis_serial_context, (uint8_t*)&line_feed, 1, 1, 0);
 
 			// if yes wait for transmission completion and then wait for response
 			srl_wait_for_tx_completion(davis_serial_context);
@@ -143,7 +143,7 @@ uint32_t davis_wake_up(uint8_t is_io_blocking) {
 		switch (davis_wake_up_state) {
 			case DAVIS_QUERY_IDLE: {
 				// sending the new line to wake up the console
-				srl_send_data(davis_serial_context, (uint8_t*)line_feed, 1, 1, 0);
+				srl_send_data(davis_serial_context, (uint8_t*)&line_feed, 1, 1, 0);
 
 				// switching the internal state
 				davis_wake_up_state = DAVIS_QUERY_SENDING_QUERY;
diff --git a/system/src/drivers/serial.c b/system/src/drivers/serial.c
index 8eda287..9341520 100644
--- a/system/src/drivers/serial.c
+++ b/system/src/drivers/serial.c
@@ -346,6 +346,61 @@ uint8_t srl_receive_data(srl_context_t *ctx, int num, char start, char stop, cha
  	return SRL_OK;
 }
 
+uint8_t srl_receive_data_with_instant_timeout(srl_context_t *ctx, int num, char start, char stop, char echo, char len_addr, char len_modifier) {
+	if (ctx->srl_rx_state == SRL_RXING)
+		return SRL_BUSY;
+
+	//trace_printf("Serial:SrlReceiveData()\r\n");
+
+	if (num >= RX_BUFFER_1_LN)
+		return SRL_DATA_TOO_LONG;
+
+	memset(ctx->srl_rx_buf_pointer, 0x00, ctx->srl_rx_buf_ln);
+
+	// checking if user want
+	if (start != 0x00) {
+		ctx->srl_triggered_start = 1;
+		ctx->srl_start_trigger = start;
+	}
+	else {
+		ctx->srl_triggered_start = 0;
+	}
+
+	if (stop != 0x00) {
+		ctx->srl_triggered_stop = 1;
+		ctx->srl_stop_trigger = stop;
+	}
+	else {
+		ctx->srl_triggered_stop = 0;
+	}
+
+	if (ctx->srl_triggered_start == 1 || ctx->srl_triggered_stop == 1) {
+		if (num < 3)
+			return SRL_WRONG_PARAMS_COMBINATION;
+
+		ctx->srl_rx_state = SRL_WAITING_TO_RX;
+		ctx->srl_rx_waiting_start_time = master_time;
+	}
+
+	ctx->srl_enable_echo = echo;
+	ctx->srl_rx_bytes_counter = 0;
+	ctx->srl_rx_bytes_req = num;
+
+	ctx->srl_rx_lenght_param_addres = len_addr;
+	ctx->srl_rx_lenght_param_modifier = len_modifier;
+
+	// set current time as receive start time
+	ctx->srl_rx_start_time = master_time;
+
+	ctx->srl_rx_timeout_calc_started = 1;
+
+	ctx->port->CR1 |= USART_CR1_RE;					// uruchamianie odbiornika
+	ctx->port->CR1 |= USART_CR1_RXNEIE;			// przerwanie od przepe�nionego bufora odbioru
+// 	PORT->CR1 |= USART_CR1_IDLEIE;			// przerwanie od bezczynno�ci szyny RS przy odbiorze
+												// spowodowanej zako�czeniem transmisji przez urz�dzenie
+ 	return SRL_OK;
+}
+
 
 
 void srl_irq_handler(srl_context_t *ctx) {