BLE multiple services and characteristics not working, error code 4 after service_init() function

[Namdev]

Hello,

I am new to Nordic platform, previously i had worked on TI controller.

I have three questions to ask:

1) My firmware consists of four services, each service has around 8-10 characterisitics. Now i have initialized four services. Its working fine and i am able to see the service list in nRF connect.

I start adding characteristics to the service, say) i have added 4 characteristics in each service it works fine. If i add one more characteristic in any of the service it starts going to  app_error_fault_handler(NRF_FAULT_ID_SDK_ERROR, 0, (uint32_t)(&error_info)); function.

2) I have read this tutorial found in github and implementing the same: 

https://github.com/bjornspockeli/custom_ble_service_example

Here we are asked to increase the RAM size when we add vendor specific UUID. can someone explain me if there is any equation or measurable parameter on how much RAM should be increased? How much RAM does each service consume. I use 128 bit UUID.

3) I have also increased the vendor_count to 4 but still its causing problem. 

I hope to receive a response in the earliest as i am in a critical stage.

Thanks & regards

Namdev Nayak

[Simonr]

Hi Namdev

Depending on your IDE, the build window (at least in SES) tells you how much your RAM/Flash needs to increase if that's the problem. What IDE are you using anyway? Also, are you able to see what function the app_error_fault_handler is called from? When in the application does this error occur.

You can also check if this error is called when you include one specific characteristic to a specific service or if it always occurs when you try adding characteristic number X total.

Best regards,

Simon