Bluetooth communication on Thingy91 (Peripheral mode)

RE: Bluetooth communication on Thingy91 (Peripheral mode)

m.saadat — Thu, 04 Aug 2022 13:07:35 GMT

Great; Thanks for the help.

RE: Bluetooth communication on Thingy91 (Peripheral mode)

Sigurd — Thu, 04 Aug 2022 12:39:27 GMT

[quote user="m.saadat"]Thanks for pointing me to the right direction. I copied these from lte_ble_gateway example to the asset_tracker_v2 conf file and now everything works fine:[/quote]

Great!

[quote user="m.saadat"]

CONFIG_AT_HOST_LIBRARY=n

Don't I need this to be set to yes for my LTE AT commands?

[/quote]

If you don't plan to send AT commands over serial, then it's not needed.

RE: Bluetooth communication on Thingy91 (Peripheral mode)

m.saadat — Wed, 03 Aug 2022 15:03:36 GMT

Thanks for pointing me to the right direction. I copied these from lte_ble_gateway example to the asset_tracker_v2 conf file and now everything works fine:

CONFIG_NRF_SW_LPUART=y
CONFIG_NRF_SW_LPUART_INT_DRIVEN=y

CONFIG_UART_1_ASYNC=y
CONFIG_UART_1_INTERRUPT_DRIVEN=n
CONFIG_UART_1_NRF_HW_ASYNC=y
CONFIG_UART_1_NRF_HW_ASYNC_TIMER=2

CONFIG_USE_SEGGER_RTT=y
CONFIG_RTT_CONSOLE=y
CONFIG_UART_CONSOLE=n
CONFIG_LOG_BACKEND_RTT=y

CONFIG_AT_HOST_LIBRARY=n

CONFIG_BT=y
CONFIG_BT_H4=y
CONFIG_BT_WAIT_NOP=y
CONFIG_BT_CENTRAL=n
CONFIG_BT_GATT_CLIENT=y
CONFIG_BT_GATT_DM=y
CONFIG_BT_SCAN=n
CONFIG_BT_SCAN_FILTER_ENABLE=n

The problem was that I did not added this line before:

CONFIG_AT_HOST_LIBRARY=n

Don't I need this to be set to yes for my LTE AT commands?

RE: Bluetooth communication on Thingy91 (Peripheral mode)

m.saadat — Wed, 03 Aug 2022 14:01:48 GMT

I put this in conf file:

CONFIG_NRF_MODEM_LIB_TRACE_ENABLED=n
CONFIG_UART_INTERRUPT_DRIVEN=y
CONFIG_ZERO_LATENCY_IRQS=n
CONFIG_BT=y
CONFIG_BT_DEBUG_LOG=y
CONFIG_BT_SMP=y
CONFIG_BT_PERIPHERAL=y
CONFIG_BT_DIS=y
CONFIG_BT_DIS_PNP=n
# CONFIG_BT_BAS=y
# CONFIG_BT_HRS=y
CONFIG_BT_DEVICE_NAME="xxxxxxxxxxx"
CONFIG_BT_DEVICE_APPEARANCE=1152
CONFIG_BT_DIS_MANUF="xxxxx"
CONFIG_BT_DIS_MODEL="xxxxxx"

added an advertising function in the ble_ready instead of scanning, and now I can see Thingy91 advertising.

However, I copy the overlay content to my asset_tracker project and put the same initialization as described on the question; It hangs up and resets because of WDT. What else needs to be amended to add bluetooth to asset_tracker project? The asset_tracker uses a lot of sensors on Thingy91; Is there any hardware conflict that needs to be avoided?

RE: Bluetooth communication on Thingy91 (Peripheral mode)

m.saadat — Wed, 03 Aug 2022 13:37:32 GMT

Hi Sigurd.

[quote userid="15146" url="~/f/nordic-q-a/90624/bluetooth-communication-on-thingy91-peripheral-mode/379888"]Did you build hci_lpuart for thingy91_nrf52840 ?[/quote]

Yes.

[quote userid="15146" url="~/f/nordic-q-a/90624/bluetooth-communication-on-thingy91-peripheral-mode/379888"]What SDK version are you using ?[/quote]

I'm using SDK V1.9.1.

[quote userid="15146" url="~/f/nordic-q-a/90624/bluetooth-communication-on-thingy91-peripheral-mode/379888"]The sample lte_ble_gateway shows you how do to this. https://github.com/nrfconnect/sdk-nrf/tree/main/samples/nrf9160/lte_ble_gateway[/quote]

I tried with samples in SDK. I built the hci_lpuart without any change and flashed it on nRF52840. I built the lte_ble_gateway by choosing the "Nordic boards" instead of "Compatible boards" and selecting thingy91_nrf9160_ns. I flashed this on nRF9160.

Thingy91 boots with blue led blinking. I see this in the terminal:

*** Booting Zephyr OS build v2.7.99-ncs1-1  ***
LTE Sensor Gateway sample started
Initializing Bluetooth..
Establishing LTE link (this may take some time) ...
Bluetooth ready
Scanning...
Received unknown event 2
Received unknown event 2
Received unknown event 2
Received unknown event 2
Received unknown event 2
Received unknown event 2
Received unknown event 2

and then the blinking stops. I don't have the Thingy52 to completely test what is mentioned in the link you sent. I'm assuming it's in central mode. I don't see it advertising. I'm not sure how I can make it advertise something to make sure it's working.

RE: Bluetooth communication on Thingy91 (Peripheral mode)

Sigurd — Wed, 03 Aug 2022 11:21:46 GMT

Hi,

[quote user=""]- Build the hci_lpuart project for the Thingy91 board (selected the board from "Nordic boards"; it was not listed in Compatible boards).[/quote]

Did you build hci_lpuart for thingy91_nrf52840 ?
What SDK version are you using ?

[quote user=""]I could not find a working example to make the Bluetooth work on Thingy91![/quote]

The sample lte_ble_gateway shows you how do to this. https://github.com/nrfconnect/sdk-nrf/tree/main/samples/nrf9160/lte_ble_gateway