diff --git a/display/software/powerboard/src/main.c b/display/software/powerboard/src/main.c
index baf5298..59daa8f 100644
--- a/display/software/powerboard/src/main.c
+++ b/display/software/powerboard/src/main.c
@@ -8,8 +8,8 @@
 
 volatile uint16_t syscounter = 0;
 uint16_t voltage = 0;
-int16_t current_in = 0;
-int16_t current_out = 0;
+uint16_t current_in = 0;
+uint16_t current_out = 0;
 
 uint8_t overvoltage_counter1 = 0;
 uint8_t overvoltage_off_counter1 = 0;
@@ -33,16 +33,20 @@ static void ports_init(void) {
 }
 
 void measure(void) {
+    static int16_t temp;
+
     voltage = adc_read_avg(AD_V, 4);
     voltage *= VOLTAGE_PER_TICK;
 
-    current_in = adc_read_avg(AD_I_GEN, 4);
-    current_in -= CURRENT_OFFSET;
-    current_in *= CURRENT_PER_TICK;
+    temp = adc_read_avg(AD_I_GEN, 4);
+    temp -= CURRENT_OFFSET;
+    if(temp < 0) temp = 0;
+    current_in = temp * CURRENT_PER_TICK;
 
-    current_out = adc_read_avg(AD_I_LOAD, 4);
-    current_out -= CURRENT_OFFSET;
-    current_out *= CURRENT_PER_TICK;
+    temp = adc_read_avg(AD_I_LOAD, 4);
+    temp -= CURRENT_OFFSET;
+    if(temp < 0) temp = 0;
+    current_out = temp * CURRENT_PER_TICK;
 }
 
 uint16_t get_power(uint16_t voltage, int16_t currents) {
@@ -56,13 +60,13 @@ void pretty_print_all_values(void) {
     uart_puts_P("mV\r\n");
 
     uart_puts_P("Load:      ");
-    uart_print_int16(current_out);
+    uart_print_uint16(current_out);
     uart_puts_P("mA  ");
     uart_print_uint16( get_power(voltage, current_out));
     uart_puts_P("W\r\n");
 
     uart_puts_P("Generator: ");
-    uart_print_int16(current_in);
+    uart_print_uint16(current_in);
     uart_puts_P("mA  ");
     uart_print_uint16(get_power(voltage, current_in));
     uart_puts_P("W\r\n");
@@ -165,7 +169,7 @@ static void work_uart(void) {
                 break;
             case 'a':
                 uart_putc('A');
-                uart_print_voltage(voltage);
+                uart_print_uint16(voltage);
                 uart_putc(',');
                 uart_print_uint16(current_in);
                 uart_putc(',');
@@ -180,9 +184,10 @@ static void work_uart(void) {
                 uart_putc(48 + (IS_DUMP_ON >> DUMPSW));
                 uart_putc(',');
                 uart_putc(48 + (IS_GEN_ON >> GENSW));
+                uart_putc('B');
                 break;
         }
-        uart_putc('\n');
+
     }
 }
 
diff --git a/display/software/powerboard/src/utils.c b/display/software/powerboard/src/utils.c
index 4551a32..466bfec 100644
--- a/display/software/powerboard/src/utils.c
+++ b/display/software/powerboard/src/utils.c
@@ -25,16 +25,6 @@ void uart_print_uint8(uint8_t x) {
 	uart_putc(48 + (x % 10));
 }
 
-
-void uart_print_int16(int16_t x) {
-    if(x <0) uart_putc('-');
-	uart_putc(48 + (x / 10000));
-	uart_putc(48 + (x % 10000 /1000));
-	uart_putc(48 + (x % 1000 / 100 ));
-	uart_putc(48 + (x % 100 / 10 ));
-	uart_putc(48 + (x % 10));
-}
-
 void uart_print_uint16(uint16_t x) {
     uart_putc(48 + (x / 10000));
     uart_putc(48 + (x % 10000 /1000));
diff --git a/display/software/powerboard/src/utils.h b/display/software/powerboard/src/utils.h
index d348e09..2573b6a 100644
--- a/display/software/powerboard/src/utils.h
+++ b/display/software/powerboard/src/utils.h
@@ -4,7 +4,6 @@
 	extern void wait(uint8_t count);
 	extern void uart_print_voltage(uint16_t);
 	extern void uart_print_uint8_t(uint8_t);
-	extern void uart_print_int16(int16_t);
 	extern void uart_print_uint16(uint16_t);
 
 #endif