How to debug NRF_ERROR_INVALID_STATE easily?

RE: How to debug NRF_ERROR_INVALID_STATE easily?

Hung Bui — Wed, 25 Feb 2015 14:58:37 GMT

@Marius: Could you update the case ? If you fixed the issue you can accept the answer so that the case is closed.

RE: How to debug NRF_ERROR_INVALID_STATE easily?

Marius Heil — Fri, 20 Feb 2015 12:36:54 GMT

Hello,

thanks. i will update this in my code. i wanted to add it as a comment, but I did not have enough characters left, so I had to post it as an answer, sorry.

RE: How to debug NRF_ERROR_INVALID_STATE easily?

Hung Bui — Fri, 20 Feb 2015 10:30:41 GMT

@Marius: You should not use bleEvent->evt.gap_evt.conn_handle when in BLE_GATTC_EVT_PRIM_SRVC_DISC_RSP event, because it's gattc_evt. You should use bleEvent->evt.gattc_evt.conn_handle

Btw, It's better if you can add your code in your initial question or post it as a comment under my answer instead of creating an answer.

RE: How to debug NRF_ERROR_INVALID_STATE easily?

Marius Heil — Thu, 19 Feb 2015 16:23:34 GMT

Hello,

here is my code that I call upon receiving the BLE_GATTC_EVT_PRIM_SRVC_DISC_RSP event:

void _bleServiceDiscoveryFinishedHandler(ble_evt_t* bleEvent){
	u32 err = 0;
	
	//Service has been found
	if(bleEvent->evt.gattc_evt.params.prim_srvc_disc_rsp.count > 0){
		if(debugPlainC) tracel("Found service");
		
		//Service handle range has been found, now start discovery on characteristics
		ble_gattc_handle_range_t handleRange;
		handleRange.start_handle = bleEvent->evt.gattc_evt.params.prim_srvc_disc_rsp.services[0].handle_range.start_handle;
		handleRange.end_handle = bleEvent->evt.gattc_evt.params.prim_srvc_disc_rsp.services[0].handle_range.end_handle;
		
		err = sd_ble_gattc_characteristics_discover(bleEvent->evt.gap_evt.conn_handle, &handleRange);
		APP_ERROR_CHECK(err);
	}
}

However I only received this error once while I was debugging and it has never occured again since. Maybe I have an error in that code snippet or maybe it was something else. I have just switched over from KEIL to developing with Eclipse and GCC.

RE: How to debug NRF_ERROR_INVALID_STATE easily?

Hung Bui — Thu, 19 Feb 2015 15:11:48 GMT

Hi Marius,

It seems you have issue with the connection handle, most likely the connection handle you used for sd_ble_gattc_characteristics_discover() is not the actual connection handle you receive when the event occurs in p_db_discovery->conn_handle.

Could you verify you have the same issue when using our device manager library ?