A chaotic value returned from sd_temp_get() after bluetooth's connection?why would this happen?

Question

Hi, 
 I want to read the temperature data from the sensor on-chip and send it to my phone by bluetooth. But as said above, after the connection between my nrf52832 module and my phone, the sd_temp_get() returned some very strange value, 
 and before connection , it worked well. 
 the LOG sequence was like this picture below: 
 
 if anyone have some advice?thanks

Einar Thorsrud · Accepted Answer

Hi, 
 You are declaring temp as a uninitialized pointer. So you have no control over where it points, and it is a typical issue that will lead to memory corruption. The correct would be to declare it as a normal variable, and refer to the address using & . So your temp_read() function should look something like this: 
 int32_t temp_read()
{
 uint32_t err_code;
 int32_t temp;

 err_code = sd_temp_get(&temp);

 NRF_LOG_INFO("the temp is: %d", temp);

 return temp;
}

A chaotic value returned from sd_temp_get() after bluetooth's connection?why would this happen?

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