nRF52832 DK is resetting when sent wifi config. form android app.

[vishal]

Hi,

I am using nRF52832 Dk and SD132, sdk is 13.1. I have sent my sensor data to server using external wifi module which is interface with nRF52832 DK.

Everything working but for low power consumption i have control WiFi CH_PD(Chip Enable Power Down) via nRF52832 GPIO with 10K resistor.

In nordic program on/off this GPIO pin whenever i want to use WiFi after sending done data to server this pin is LOW. 

But now problem facing is when i want to configure new WiFi credential through AT cmd and sent it to nRF52832 by android. At this time i have High GPIO pin and ON WiFi chip but same time nRF52 is reset at start gain it not process as per the AT command configuration new WiFi credentials.

I have following few questions:

1. Why nRF52 is reset when sending AT command via android.
2. Is it write GPIO pin configuration for High and LOW.

nrf_gpio_range_cfg_output(12, 12);

nrf_gpio_pin_write(12,1);

      3. For controlling this Ch_PD pin is it need to use transistor or MOSFET with nRF52chip.

      Looking forward your reply...

Thanks in Advanced......

[MartinBL]

Hi,

In 99% of all cases where the board resets, it is because a function in your code has returned an error code. The error code is then processed by APP_ERROR_CHECK() which will reset your device unless you specifically tell it not to do it. Have you tried debugging like this? 

You probably don't need a MOSFET. I'm guessing that Ch_PD is just a regular input pin on your WiFi chip, and I have never seen anyone using a MOSFET to control such an input. MOSFETs are usually only used if you need to turn on and off loads that draw a lot of current or use higher voltages than your microcontroller (motors, very bright LEDs, etc.). 

[vishal]

Thanks for your reply,

I saw the above debugging link but i am using eclipse IDE. In that i debugging my code when i send wifi credentials to nRF52832 i see in debugging like : 

:ERROR:Fatal
:INFO:Hit weak handler

But not seeking any error code.

Can you please tell me how i can see error code the following i have written function:

void ESP_WiFi_config()
{
NRF_LOG_INFO("WiFi Config. Start\r\n");
nrf_gpio_range_cfg_output(12, 12);
nrf_gpio_pin_write(12,1);
nrf_delay_ms(5000);
NRF_LOG_INFO("WiFi_Txbuff: 1\r\n");
sprintf((char*)WiFi_Txbuff, "AT+CWJAP_DEF=\"%s\",\"%s\"\r\n\r\n", ssid_buff, passkey_buff);
printf((char*)WiFi_Txbuff);
NRF_LOG_INFO("WiFi_Txbuff: 2\r\n");
// nrf_delay_ms(5000);
}

When goes in this function and high GPIO 12 pin at that time my Nordic Dk is reset.

How i can see error code.

Thanks, 

[MartinBL]

When you see those messages printed to your terminal it means that you have ended up in a function called:

__WEAK void app_error_fault_handler(uint32_t id, uint32_t pc, uint32_t info)

which is defined inside the file SDK_13.1.0\components\libraries\util\app_error_weak.c. 

You can modify that function to look something like this instead, to make it print out some more informative messages:

__WEAK void app_error_fault_handler(uint32_t id, uint32_t pc, uint32_t info)
{
    static error_info_t  * p_error_info;
    p_error_info = (error_info_t*)info;
    NRF_LOG_ERROR("Error: ID: %d, PC: 0x%X\n\r", id, pc);
    NRF_LOG_ERROR("Error: Code: 0x%04X (%d), Line: %d, File: %s\n\r", p_error_info->err_code, p_error_info->err_code, p_error_info->line_num, (uint32_t)p_error_info->p_file_name);
    NRF_LOG_FINAL_FLUSH();
    // On assert, the system can only recover with a reset.
#ifndef DEBUG
    NRF_LOG_INFO("Hit weak handler\r\n");
    NVIC_SystemReset();
#else
    app_error_save_and_stop(id, pc, info);
#endif // DEBUG
}