TWI sensor data not sent

RE: TWI sensor data not sent

timothyeah — Sun, 10 Mar 2019 00:55:58 GMT

I've narrowed down this problem and identified that something is wrong with my data_array. The new question is here.

RE: TWI sensor data not sent

Jared — Wed, 27 Feb 2019 08:18:28 GMT

What does ble_nus_data_send() return? And what softdevice and SDK version are you using?

RE: TWI sensor data not sent

timothyeah — Tue, 26 Feb 2019 14:45:13 GMT

Yes, I can confirm the nRF receives data from the sensor correctly.

The problem must be somewhere in transferring the data to the bluetooth functions. This seems like it should be simple to achieve, but it's not clear why it is not working.

RE: TWI sensor data not sent

Jared — Tue, 26 Feb 2019 14:23:43 GMT

Hi,

The first step in debugging this is to confirm that the nRF receives the data from the Temperature sensor correctly. Could you use the debugger and see if it's received?

Jared

RE: TWI sensor data not sent

timothyeah — Sat, 23 Feb 2019 12:01:02 GMT

I think that's the same as in line 764. Anyway I tried re-arranging it into the form shown in this sensor example code, but no luck. Still getting the same result.

RE: TWI sensor data not sent

ps_anu — Sat, 23 Feb 2019 11:28:48 GMT

yes but you need declare like below

 */
void LM75B_set_mode(void)
{
    ret_code_t err_code;

    /* Writing to LM75B_REG_CONF "0" set temperature sensor in NORMAL mode. */
    uint8_t reg[2] = {0x00U};
    err_code = nrf_drv_twi_tx(&m_twi, LM75B_ADDR, reg, sizeof(reg), false);
    APP_ERROR_CHECK(err_code);
    while (m_xfer_done == false);

}

RE: TWI sensor data not sent

timothyeah — Sat, 23 Feb 2019 11:20:21 GMT

The register addresses for TWI are stored in line 74

RE: TWI sensor data not sent

ps_anu — Sat, 23 Feb 2019 11:15:27 GMT

i think you need to give the register address in order to get the data