How to change the heap memory location in nRF5 SDK

[McGregor]

Hello,

I am currently working with nRF5 SDK for thread using NrF52840 DK. While publish data over  MQTT-SN I get this error of NRF_NO_MEM (0x04). So basically in publish function, malloc is called to to assign me the memory.

So whenever I am trying to send more than 247 character string I get the memory error. So i would like to know how I can increase the memory. I have seen in nRF5 SDK sdkconfig file, there are lot of memory parameters but I have no idea which parameter will help me to allocate more memory so that I don't face this error. 

Were can i find the linker script and how can I modify according to my needs. I have some advice related to changing heap size under  .asm , but I don't know we're to find .asm in Segger studio. 

Any guidance or help is appreciated.

Thanks 

[Marjeris Romero]

Hi,

Are you talking about the buffers allocated by nrf_malloc()? nrf_malloc uses statically allocated memory, so no heap. See the answer in this case: https://devzone.nordicsemi.com/f/nordic-q-a/63145/mqtt-sn-example-heap-size/257541#257541

The memory size is configurable in sdk_config.

Best regards,

Marjeris