diff --git a/src/gps.c b/src/gps.c
--- a/src/gps.c
+++ b/src/gps.c
@@ -36,13 +36,13 @@ char tramsmissionType[7];
 void gps_poweron(void)
 {
     // NOTE: pchannel
-    gpio_clear(GPS_ONOFF);
+    //gpio_clear(GPS_ONOFF);
 }
 
 void gps_poweroff(void)
 {
     // NOTE: pchannel
-    gpio_set(GPS_ONOFF);
+    //gpio_set(GPS_ONOFF);
 }
 
 char timestamp[12];	//hhmmss.ss
@@ -172,7 +172,7 @@ enum decodeState {
 
 void usart1_isr(void)
 {
-	uint8_t recv = usart_recv(GPS_USART);
+	uint8_t recv = 0;// usart_recv(GPS_USART);
 	//ECHO debug: usart_send_blocking(GPS_USART, recv);
 	nmeaBuffer[nmeaBufferDataPosition % NMEABUFFER_SIZE] = recv;
 	nmeaBufferDataPosition = (nmeaBufferDataPosition + 1) % NMEABUFFER_SIZE;
@@ -214,7 +214,7 @@ void gps_sendubx(uint8_t* dat, uint8_t s
     uint8_t sendctr;
     for(sendctr = 0; sendctr < size; sendctr++)
     {
-        usart_send(GPS_USART, dat[sendctr]);
+        //usart_send(GPS_USART, dat[sendctr]);
     }
 }