diff --git a/build/test.uf2 b/build/test.uf2
new file mode 100644
index 0000000000000000000000000000000000000000..2c128c1eb5c568f094cbe31cece2056e8eeede80
Binary files /dev/null and b/build/test.uf2 differ
diff --git a/test.c b/test.c
index db31a00d98abb396e4d3f561749bc43402269217..44abb43865d3cc82cd82cbd724075a18e5bb0059 100644
--- a/test.c
+++ b/test.c
@@ -8,14 +8,14 @@
 #include "hba_tx.pio.h"
 #include "hba_rx.pio.h"
 
-//#define TX_RAW_TIME  //This will give the raw time between edges instead of decoding it
-#define SIMULATE_HBAT //Reply on request 
+#define TX_RAW_TIME  //This will give the raw time between edges instead of decoding it
+//#define SIMULATE_HBAT //Reply on request 
 
-const uint TX_PIN = 14;  //25=LED to test
-const uint RX_PIN = 14;
+const uint TX_PIN = 17;  //25=LED to test
+const uint RX_PIN = 17;
 
-///#define TXtimeout 0x1000
-#define TXtimeout 0x80
+#define TXtimeout 0x1000
+//#define TXtimeout 0x80
 
 //Need to change norm delay constants if time is changed!!  This can be done using TX_RAW_TIME and python scripts.
 inline uint16_t NormDelay(uint16_t x){  return (TXtimeout-x+19)/20;  }
@@ -25,7 +25,7 @@ char buffer1[BUFFERSIZE];
 uint16_t buffer2[BUFFERSIZE];
 uint8_t bcnt1=0,bcnt2=0;
 uint8_t bcnt3=0,bcnt4=0;
-uint16_t dummy;
+uint32_t dummy;
 void core1_entry() {
 while (1) {
 //   printf("3");
@@ -45,8 +45,15 @@ while (1) {
     else {
       int x = getchar_timeout_us(0);
       if (x!=PICO_ERROR_TIMEOUT){
-        buffer1[bcnt1]=x;
-        bcnt1++;bcnt1%=BUFFERSIZE;
+        if (x==0) {
+//          gpio_set_dir(TX_PIN, GPIO_OUT);
+//          gpio_put(TX_PIN,0);
+          gpio_set_pulls(TX_PIN,false,true);
+        } else {
+          gpio_set_pulls(TX_PIN,true,false);
+          buffer1[bcnt1]=x;
+          bcnt1++;bcnt1%=BUFFERSIZE;
+        }
       }
     }
 }};
@@ -70,7 +77,7 @@ int main() {
     printf("Init\n");
 //  gpio_init(LED_PIN);
 //  gpio_set_dir(LED_PIN, GPIO_OUT);
-//    gpio_set_pulls(TX_PIN,true,false);
+    gpio_set_pulls(TX_PIN,true,false);
 //    gpio_set_pulls(RX_PIN,true,false);
     pio_sm_put_blocking(pio_tx, sm , 12500); //Bitrate = 150e6 / val. e.g. 15k = 10kHz
     pio_sm_put_blocking(pio_rx, sm1, TXtimeout); //Timeout
@@ -85,7 +92,7 @@ int main() {
     } else if ((pio_sm_get_tx_fifo_level(pio_tx, sm)<4) && (bcnt1!=bcnt2)) {  //Second priority: Keep TX FIFO full
        pio_sm_put_blocking(pio_tx, sm, buffer1[bcnt2]);
        bcnt2++;bcnt2%=BUFFERSIZE;
-    } else if (dummy++==0) printf(".");
+    } else if (dummy++==0) printf("\n");
     
   }
 #endif //TX_RAW_TIME