diff --git a/bootloader.c b/bootloader.c
index c27550a..b34d264 100644
--- a/bootloader.c
+++ b/bootloader.c
@@ -21,10 +21,11 @@
 
 error_code status;
 
-char okk[4] = "OK\r\n";
-char errr[5] = "ERR\r\n";
-
-
+/*
+is_even_assembly:
+        ldr sp, [r0]
+    ret  
+*/
 
 char* argvs[3][10];
 
@@ -58,6 +59,7 @@ int main(void) {
 			crc_prog = uart_string_to_int(cmd.argv[3]);
 			total_size = uart_string_to_int(cmd.argv[2]);
 			offset = uart_string_to_int(cmd.argv[1]);
+			SCB->VTOR = offset;
 			crc_data = uart_commands_prog(&status, total_size);
 			offset_pointer = offset;
 
diff --git a/uart_commands.c b/uart_commands.c
index c44cc43..2b87628 100644
--- a/uart_commands.c
+++ b/uart_commands.c
@@ -5,9 +5,103 @@ static uint8_t data[1024];
 char OK[5] = "OK\r\n";
 char ERR[6] = "ERR\r\n";
 
-void digit_to_str(char* str, uint32_t number){
+void digit_to_str(char* str, uint32_t number, int base){
 	itoa(number,str,16);
 }
+/*
+void digit_to_str(char* str, uint32_t number, int base){
+	char tmp_char[32];
+	uint32_t tmp = number;
+	int tmp_counter = 0;
+	for(int i = 0; i<32; i++);
+		switch (tmp & 15)
+		{
+		case 0:
+			tmp_char[tmp_counter] = '0';
+			tmp_counter++;
+			tmp=tmp/base;
+			break;
+		case 1:
+			tmp_char[tmp_counter] = '1';
+			tmp_counter++;
+			tmp=tmp/base;
+			break;
+		case 2:
+			tmp_char[tmp_counter] = '2';
+			tmp_counter++;
+			tmp=tmp/base;
+			break;
+		case 3:
+			tmp_char[tmp_counter] = '3';
+			tmp_counter++;
+			tmp=tmp/base;
+			break;
+		case 4:
+			tmp_char[tmp_counter] = '4';
+			tmp_counter++;
+			tmp=tmp/base;
+			break;
+		case 5:
+			tmp_char[tmp_counter] = '5';
+			tmp_counter++;
+			tmp=tmp/base;
+			break;
+		case 6:
+			tmp_char[tmp_counter] = '6';
+			tmp_counter++;
+			tmp=tmp/base;
+			break;
+		case 7:
+			tmp_char[tmp_counter] = '7';
+			tmp_counter++;
+			tmp=tmp/base;
+			break;
+		case 8:
+			tmp_char[tmp_counter] = '8';
+			tmp_counter++;
+			tmp=tmp/base;
+			break;
+		case 9:
+			tmp_char[tmp_counter] = '9';
+			tmp_counter++;
+			tmp=tmp/base;
+			break;
+		case 10:
+			tmp_char[tmp_counter] = 'a';
+			tmp_counter++;
+			tmp=tmp/base;
+			break;
+		case 11:
+			tmp_char[tmp_counter] = 'b';
+			tmp_counter++;
+			tmp=tmp/base;
+			break;
+		case 12:
+			tmp_char[tmp_counter] = 'c';
+			tmp_counter++;
+			tmp=tmp/base;
+			break;
+		case 13:
+			tmp_char[tmp_counter] = 'd';
+			tmp_counter++;
+			tmp=tmp/base;
+			break;
+		case 14:
+			tmp_char[tmp_counter] = 'e';
+			tmp_counter++;
+			tmp=tmp/base;
+			break;
+		case 15:
+			tmp_char[tmp_counter] = 'f';
+			tmp_counter++;
+			tmp=tmp/base;
+			break;
+		}
+		for(int i = 0; i<tmp_counter; i++){
+			str[i] = tmp_char[tmp_counter-i];
+		}
+		str[tmp_counter] = '\0';
+}*/
 
 int addr_to_sector(int addr){
 	int tmp = addr & 0xfffff;
@@ -43,9 +137,9 @@ void uart_commands_getid(error_code* status){
     char hex[15] = "0x26113f37\r\n";
 	//char hex[15];
     uint32_t res = iap_read_part_id(status);
-	//digit_to_str(hex+2, res);
-	//hex[0]='0';
-	//hex[1]='x';
+	//digit_to_str(hex+1, res, 16);
+	hex[0]='0';
+	hex[1]='x';
     //sprintf(hex, "0x%x\r\n", res);
     if(*status == 0){
         uart_send_ok();
@@ -58,6 +152,12 @@ void uart_commands_getserial(error_code* status){
     char hex[40] = "0x8005018af27a5225a541628f50020c0\r\n";
     uint32_t res[4];
     iap_read_serial(status, res);
+    /*digit_to_str(hex+1, res[0], 16);
+    digit_to_str(hex+9, res[1], 16);
+    digit_to_str(hex+17, res[2], 16);
+    digit_to_str(hex+25, res[3], 16);*/
+    hex[0]='0';
+    hex[1]='x';
     //sprintf(hex, "0x%x%x%x%x\r\n", res[0], res[1], res[2], res[3]);
     if(*status == 0){
         uart_send_ok();
@@ -74,19 +174,19 @@ crc_t uart_commands_prog(error_code* status, int size){
 	if(*status != ok){
 		uart_send_err();
 		itoa(*status, &digit, 10);
-		uart_send(digit, 1);
+		uart_send(&digit, 1);
 	}
 	iap_erase_sectors(status, addr_to_sector(APP_OFFSET), addr_to_sector(APP_OFFSET+size));
 	if(*status != ok){
 		uart_send_err();
 		itoa(*status, &digit, 10);
-		uart_send(digit, 1);
+		uart_send(&digit, 1);
 	}
 	iap_prepare_sectors(status, addr_to_sector(APP_OFFSET), addr_to_sector(APP_OFFSET+size));
 	if(*status != ok){
 		uart_send_err();
 		itoa(*status, &digit, 10);
-		uart_send(digit, 1);
+		uart_send(&digit, 1);
 	}
 	uart_send_ok();
 	return crc_init();
@@ -115,7 +215,7 @@ error_code uart_commands_data(error_code* status, int size, crc_t* checksum_glob
 		if(*status != ok){
 			uart_send_err();
 			itoa(*status, &digit, 10);
-			uart_send(digit, 1);
+			uart_send(&digit, 1);
 			return *status;
 		}
 		uart_send_ok();
@@ -123,7 +223,7 @@ error_code uart_commands_data(error_code* status, int size, crc_t* checksum_glob
 	}else{
 		uart_send_err();
 		itoa(*status, &digit, 10);
-		uart_send(digit, 1);
+		uart_send(&digit, 1);
 	}
 		return local_checksum;
 }
diff --git a/uart_commands.h b/uart_commands.h
index c52c628..0175b48 100644
--- a/uart_commands.h
+++ b/uart_commands.h
@@ -37,6 +37,6 @@ void uart_send_err();
 
 int addr_to_sector(int addr);
 
-void digit_to_str(char* str, uint32_t number);
+void digit_to_str(char* str, uint32_t number, int base);
 
 uint32_t uart_string_to_int(const char* str);