TWI scanner no devices found

Question

Hi, 
 I am using the TWI scanner example from the sdk15. Board is NRF52840. I have a differential pressure sensor connected to the TWI input pins on the nordic board and am trying to read the pressure. However, for that I need to be able to observe that there is a device. 
 I have gotten this sensor working via an arduino with the same pin connections as I am using for the Nordic board. 2 4.7Kohm resistors one for each line upto VDD(3.3). 
 I am using the P27 and P26 ports as defined in the example they are not used for anything else. But when I run my terminal I just get a loop stating no devices are connected. 
 I can see using a logic analyser that the clock and data are running but no response. My sensor has the address of 0X40. 
 Here is my code: 
 /**
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 * contributors may be used to endorse or promote products derived from this
 * software without specific prior written permission.
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 * Nordic Semiconductor ASA integrated circuit.
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 * engineered, decompiled, modified and/or disassembled.
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 */
/** @file
 * @defgroup tw_scanner main.c
 * @{
 * @ingroup nrf_twi_example
 * @brief TWI Sensor Example main file.
 *
 * This file contains the source code for a sample application using TWI.
 *
 */

#include <stdio.h>
#include "boards.h"
#include "app_util_platform.h"
#include "app_error.h"
#include "nrf_drv_twi.h"
#include "nrf_delay.h"



#include "nrf_log.h"
#include "nrf_log_ctrl.h"
#include "nrf_log_default_backends.h"

/* TWI instance ID. */
#if TWI0_ENABLED
#define TWI_INSTANCE_ID 0
#elif TWI1_ENABLED
#define TWI_INSTANCE_ID 1
#endif

 /* Number of possible TWI addresses. */
 #define TWI_ADDRESSES 127

/* TWI instance. */
static const nrf_drv_twi_t m_twi = NRF_DRV_TWI_INSTANCE(TWI_INSTANCE_ID);


/**
 * @brief TWI initialization.
 */
void twi_init (void)
{
 ret_code_t err_code;

 const nrf_drv_twi_config_t twi_config = {
 .scl = ARDUINO_SCL_PIN,//27 (green)
 .sda = ARDUINO_SDA_PIN,//26 (yellow)
 .frequency = NRF_DRV_TWI_FREQ_100K,
 .interrupt_priority = APP_IRQ_PRIORITY_HIGH,
 .clear_bus_init = false
 };

 err_code = nrf_drv_twi_init(&m_twi, &twi_config, NULL, NULL);
 APP_ERROR_CHECK(err_code);

 nrf_drv_twi_enable(&m_twi);
}


/**
 * @brief Function for main application entry.
 */
int main(void)
{
 ret_code_t err_code;
 uint8_t address;
 uint8_t sample_data;
 bool detected_device = false;

 APP_ERROR_CHECK(NRF_LOG_INIT(NULL));
 NRF_LOG_DEFAULT_BACKENDS_INIT();

 NRF_LOG_INFO("TWI scanner started.");
 NRF_LOG_FLUSH();
 twi_init();

 for (address = 1; address <= TWI_ADDRESSES; address++)
 {
 err_code = nrf_drv_twi_rx(&m_twi, address, &sample_data, sizeof(sample_data));
 if (err_code == NRF_SUCCESS)
 {
 detected_device = true;
 NRF_LOG_INFO("TWI device detected at address 0x%x.", address);
 }
 NRF_LOG_FLUSH();
 }

 if (!detected_device)
 {
 NRF_LOG_INFO("No device was found.");
 NRF_LOG_FLUSH();
 }

 while (true)
 {
 for (address = 1; address <= TWI_ADDRESSES; address++)
 {
 err_code = nrf_drv_twi_rx(&m_twi, address, &sample_data, sizeof(sample_data));
 if (err_code == NRF_SUCCESS)
 {
 detected_device = true;
 NRF_LOG_INFO("TWI device detected at address 0x%x.", address);
 }
 NRF_LOG_FLUSH();
 }
 if (!detected_device)
 {
 NRF_LOG_INFO("No device was found.");
 NRF_LOG_FLUSH();
 }
 nrf_delay_ms(500);
 }
}

/** @} */
 
 Here is my scope: 
 Note the top line is the clock and bottom is the data (SCL and SDA respectively) 
 
 After fixing the issue of not seeing the device on the Nordic board I then will need to emulate my arduino code on the board to read this sensor. 
 Please could someone look into this issue 
 Thanks