Getting error code =4 in ble_stack_init.

[kishor babu]

Hi,

I am working on implementing concurrent  BLE UART central and peripheral service. I am doing this by taking "ble_app_hrs_rscs_relay" default  example as a reference.

I am facing a issue where in "ble_stack_init()" function "nrf_sdh_ble_enable(&ram_start);" is returning "error code=4" and system is resetting. 

I am using nrf52832 DK, sdk v14.0 and keil v 5.

How can I fix this issue?

[Jørgen Holmefjord]

Hi,

Error code 0x04 means NRF_ERROR_NO_MEM, and is returned from call to sd_ble_enable() in nrf_sdh_ble_enable(). The API documentation for the function suggest the following problem:

One or more of the following is true:

• The amount of memory assigned to the SoftDevice by *p_app_ram_base is not large enough to fit this configuration's memory requirement. Check *p_app_ram_base and set the start address of the application RAM region accordingly.
• Dynamic part of the SoftDevice RAM region is larger then 64 kB which is currently not supported.

You should try to modify the RAM configuration for your application, please see this tutorial.

Best regards,
Jørgen

[Jørgen Holmefjord]

I would recommend that you set breakpoints in your application where you call app_uart_put()/printf(), to see if you are actually printing the same data two times. Note that you will have to restart the application after hitting a breakpoint, in order to restore the state of the softdevice.