Error log

[Geek]

Hello,

My NUS services work fine i can transmit and receive  data over UART , but i still get this error in my nRF Toolbox (UART) . Any help will apreciated 

 

[Amanda Hsieh]

Hi, 

Which version of SDK are you using? 

What did you modify the example project?

Could you enable the RTT log in the sdk_config.h and provide the log?

#ifndef NRF_LOG_BACKEND_RTT_ENABLED
#define NRF_LOG_BACKEND_RTT_ENABLED 1
#endif

Could you also provide the sniff log?

This post might help. 

-Amanda H.

[Geek]

Hello Amanda,

im using zephyr rtos  and here the to creat GATT service 

BT_GATT_SERVICE_DEFINE(nus_svc,
		       BT_GATT_PRIMARY_SERVICE(&nus_base_uuid),
		       BT_GATT_CHARACTERISTIC(&nus_tx_uuid.uuid,  // TX from the point of view of the central
					      BT_GATT_CHRC_WRITE,   			              // central is allowed to write to tx
					      BT_GATT_PERM_WRITE,
					      NULL, bt_tx_callback, NULL),
		       BT_GATT_CHARACTERISTIC(&nus_rx_uuid.uuid,  // RX from point of view of central
					      BT_GATT_CHRC_READ | BT_GATT_CHRC_NOTIFY,
					      BT_GATT_PERM_READ,
					      bt_rx_callback, NULL, NULL),
		       BT_GATT_CCC(bt_uart_ccc_changed,
				   BT_GATT_PERM_READ | BT_GATT_PERM_WRITE));

[Amanda Hsieh]

Hi Geek, 

I cannot see any UUID values you are using, but I am guessing they are initialized properly?!

I think it might be a permission problem. You may take a look https://github.com/NordicPlayground/fw-nrfconnect-nrf/blob/master/subsys/bluetooth/services/nus.c#L47

/* UART Service Declaration */
BT_GATT_SERVICE_DEFINE(nus_svc,
BT_GATT_PRIMARY_SERVICE(BT_UUID_NUS_SERVICE),
	BT_GATT_CHARACTERISTIC(BT_UUID_NUS_TX,
			       BT_GATT_CHRC_NOTIFY,
			       BT_GATT_PERM_READ,
			       NULL, NULL, NULL),
	BT_GATT_CCC(NULL, BT_GATT_PERM_READ | BT_GATT_PERM_WRITE),
	BT_GATT_CHARACTERISTIC(BT_UUID_NUS_RX,
			       BT_GATT_CHRC_WRITE |
			       BT_GATT_CHRC_WRITE_WITHOUT_RESP,
			       BT_GATT_PERM_READ | BT_GATT_PERM_WRITE,
			       NULL, on_receive, NULL),
);

-Amanda H.