diff --git a/app/config/sdk_config.h b/app/config/sdk_config.h
index c7a5c30..31b3e78 100644
--- a/app/config/sdk_config.h
+++ b/app/config/sdk_config.h
@@ -5682,7 +5682,7 @@
 // <e> SPI2_ENABLED - Enable SPI2 instance
 //==========================================================
 #ifndef SPI2_ENABLED
-#define SPI2_ENABLED 0
+#define SPI2_ENABLED 1
 #endif
 // <q> SPI2_USE_EASY_DMA  - Use EasyDMA
  
diff --git a/app/main.c b/app/main.c
index 9bfc256..98a0903 100644
--- a/app/main.c
+++ b/app/main.c
@@ -321,7 +321,7 @@ void main() {
 static void test_tx_timer_cb(void* p_context) {
   static uint32_t data;
   data++;
-  ZLOGI("tim cb %d", data);
+  ZLOGI("tim cb %d :%d", data,ThreeLeadECG_ready_pin_state_get());
   // ThreeLeadECG_sdcard_connect2_ext_usb_sdcard_driver_ic_reset();
 }
 
diff --git a/app/src/three_lead/three_lead_board.c b/app/src/three_lead/three_lead_board.c
index 6deb57b..0779754 100644
--- a/app/src/three_lead/three_lead_board.c
+++ b/app/src/three_lead/three_lead_board.c
@@ -33,11 +33,12 @@
 #define SDCARD_USBDRIVER_IC_RESET_PIN             28
 #define SDCARD_POWER_CTRL_PIN                     30
 
-#define ADS1293_SPI_SCK_PIN  (32+9)
+#define ADS1293_SPI_SCK_PIN  (32 + 9)
 #define ADS1293_SPI_MOSI_PIN 15
 #define ADS1293_SPI_MISO_PIN 20
 #define ADS1293_SPI_CS0_PIN  3
 #define ADS1293_SPI_CS1_PIN  29
+#define ADS1293_READY_PIN    31
 
 /*******************************************************************************
  *                                    TOOLS                                    *
@@ -362,7 +363,7 @@ void ThreeLeadECG_sdcard_umount() {
  *                                    ecg                                      *
  *******************************************************************************/
 
-static const nrf_drv_spi_t spi = NRF_DRV_SPI_INSTANCE(0); /**< SPI instance. */
+static const nrf_drv_spi_t spi = NRF_DRV_SPI_INSTANCE(2); /**< SPI instance. */
 
 static ads1293_t m_ads1293_0;
 static ads1293_t m_ads1293_1;
@@ -385,12 +386,13 @@ void ThreeLeadECG_ecg_init() {
   spi_config.mosi_pin             = ADS1293_SPI_MOSI_PIN;
   spi_config.sck_pin              = ADS1293_SPI_SCK_PIN;
   spi_config.frequency            = NRF_DRV_SPI_FREQ_1M;
-  spi_config.mode = NRF_DRV_SPI_MODE_3;
+  spi_config.mode                 = NRF_DRV_SPI_MODE_3;
   // spi_config.mode =
   ZERROR_CHECK(nrf_drv_spi_init(&spi, &spi_config, NULL, NULL));
 
-  znrf_gpio_cfg_output(ADS1293_SPI_CS0_PIN, NRF_GPIO_PIN_PULLUP);
-  znrf_gpio_cfg_output(ADS1293_SPI_CS1_PIN, NRF_GPIO_PIN_PULLUP);
+  znrf_gpio_cfg_output(ADS1293_SPI_CS0_PIN, NRF_GPIO_PIN_NOPULL);
+  znrf_gpio_cfg_output(ADS1293_SPI_CS1_PIN, NRF_GPIO_PIN_NOPULL);
+  nrf_gpio_cfg_input(ADS1293_READY_PIN, NRF_GPIO_PIN_PULLUP);
 
   nrf_gpio_pin_set(ADS1293_SPI_CS0_PIN);
   nrf_gpio_pin_set(ADS1293_SPI_CS1_PIN);
@@ -406,3 +408,4 @@ void ThreeLeadECG_ecg_init() {
   revid = ads1293_spi_readreg(&m_ads1293_1, TI_ADS1293_REVID_REG);
   NRF_LOG_INFO("ads1293_1 revid: %d", revid);
 }
+bool ThreeLeadECG_ready_pin_state_get() { return nrf_gpio_pin_read(ADS1293_READY_PIN); }
diff --git a/app/src/three_lead/three_lead_board.h b/app/src/three_lead/three_lead_board.h
index 9d61f81..ac9d1ac 100644
--- a/app/src/three_lead/three_lead_board.h
+++ b/app/src/three_lead/three_lead_board.h
@@ -46,3 +46,4 @@ void ThreeLeadECG_sdcard_umount();
  *                                     ECG                                     *
  *******************************************************************************/
 void ThreeLeadECG_ecg_init();
+bool ThreeLeadECG_ready_pin_state_get();