Best way to debug bt_nus_send()?

RE: Best way to debug bt_nus_send()?

Sigurd — Tue, 28 Jun 2022 12:55:12 GMT

[quote user="whyeye"]Regarding enabling notifications, I think the app has the icons backwards, see below:[/quote]

When the notifications is disabled, you have the option to enable it by clicking the button:
When the notifications is enabled, you have the option to disable it by clicking the button:

[quote user="whyeye"]

However, the RTT is still showing various warnings:

[/quote]

Try setting this in prj.confg, and then request longer MTU from the phone.

CONFIG_BT_USER_DATA_LEN_UPDATE=y
CONFIG_BT_USER_PHY_UPDATE=y
CONFIG_BT_GAP_AUTO_UPDATE_CONN_PARAMS=n

CONFIG_BT_BUF_ACL_RX_SIZE=251
CONFIG_BT_GATT_CLIENT=y
CONFIG_BT_ATT_PREPARE_COUNT=2
CONFIG_BT_CONN_TX_MAX=10
CONFIG_BT_L2CAP_TX_BUF_COUNT=10
CONFIG_BT_L2CAP_TX_MTU=247
CONFIG_BT_L2CAP_DYNAMIC_CHANNEL=y
CONFIG_BT_CTLR_PHY_2M=y
CONFIG_BT_CTLR_RX_BUFFERS=2
CONFIG_BT_BUF_ACL_TX_COUNT=10
CONFIG_BT_BUF_ACL_TX_SIZE=251
CONFIG_BT_CTLR_DATA_LENGTH_MAX=251

RE: Best way to debug bt_nus_send()?

whyeye — Tue, 28 Jun 2022 11:11:20 GMT

Thanks Sigurd. Regarding enabling notifications, I think the app has the icons backwards, see below:

Now, I found that if the value is set to "Notifications enabled" (0x01-00), I am actually receiving data on the client side. However, the RTT is still showing various warnings:

Can you provide any guidance on how to find the root cause?

Thanks.

RE: Best way to debug bt_nus_send()?

Sigurd — Tue, 28 Jun 2022 06:56:26 GMT

Hi,

[quote user=""]I have enabled notifications on the client side so the issue isn't that.[/quote]

I assume you clicked the "Enable notifications" button then.

Could you try to print the error-code? Try modifying the ble_write_thread() so it looks something like this:

void ble_write_thread(void)
{
    int err = 0;
	/* Don't go any further until BLE is initialized */
	k_sem_take(&ble_init_ok, K_FOREVER);

	for (;;) {
		/* Wait indefinitely for data to be sent over bluetooth */
		struct uart_data_t *buf = k_fifo_get(&fifo_uart_rx_data,
						     K_FOREVER);
        err = bt_nus_send(NULL, buf->data, buf->len);
		if (err) {
			LOG_WRN("Failed to send data over BLE connection. Error: %d",err);
		}

		k_free(buf);
	}
}

RE: Best way to debug bt_nus_send()?

whyeye — Mon, 27 Jun 2022 23:21:37 GMT

I got an email saying this ticket has been replied to, but I don't see anything in this thread?