Skip to content

samples: Bluetooth: Central plus Peripheral with notifications - #110679

Closed
cvinayak wants to merge 1 commit into
zephyrproject-rtos:mainfrom
cvinayak:copilot/samples-bluetooth-central-gatt-notify
Closed

samples: Bluetooth: Central plus Peripheral with notifications#110679
cvinayak wants to merge 1 commit into
zephyrproject-rtos:mainfrom
cvinayak:copilot/samples-bluetooth-central-gatt-notify

Conversation

@cvinayak

@cvinayak cvinayak commented Jun 6, 2026 •
edited
Loading

Copy link
Copy Markdown
Contributor

Add three new Bluetooth samples:

  • peripheral_gatt_notify: Peripheral that sends GATT notifications
  • central_notify_receive: Central that receives GATT notifications
  • central_peripheral_notify_send_receive: Central plus Peripheral

Add bsim CI test tests/bsim/bluetooth/host/multirole_gatt_relay to verify the 3-device notification relay topology under simulation.

Assisted-by: GitHub CoPilot: Claude Opus 4.6

Steps to run:

Terminal 1:

mkdir -p build/central_notify_receive

cd build/central_notify_receive

cmake -GNinja -DBOARD=nrf52_bsim/native ../../samples/bluetooth/central_notify_receive

ninja

./zephyr/zephyr.exe -s=temp -d=0

Terminal 2:

mkdir -p build/central_peripheral_notify_send_receive

cd build/central_peripheral_notify_send_receive

cmake -GNinja -DBOARD=nrf52_bsim/native ../../samples/bluetooth/central_peripheral_notify_send_receive

ninja

./zephyr/zephyr.exe -s=temp -d=1 -xo_drift=+100e-6

Terminal 3:

mkdir -p build/peripheral_gatt_notify

cd build/peripheral_gatt_notify

cmake -GNinja -DBOARD=nrf52_bsim/native ../../samples/bluetooth/peripheral_gatt_notify

ninja

./zephyr/zephyr.exe -s=temp -d=2

Terminal 4:

cd ../tools/bsim/bin

./bs_2G4_phy_v1 -s=temp -D=3 -sim_length=600e6 -argschannel -at=40

Logs:

Terminal 1:

d_00: @00:00:00.000000  *** Booting Zephyr OS build v4.4.0-4476-ga823bbf7c143 ***
d_00: @00:00:00.000000  [00:00:00.000,000] <inf> bt_hci_core: HW Platform: Nordic Semiconductor (0x0002)
d_00: @00:00:00.000000  [00:00:00.000,000] <inf> bt_hci_core: HW Variant: unknown (0x0002)
d_00: @00:00:00.000000  [00:00:00.000,000] <inf> bt_hci_core: Firmware: Standard Bluetooth controller (0x00) Version 4.4 Build 99
d_00: @00:00:00.000000  [00:00:00.000,000] <wrn> bt_id: No static addresses stored in controller
d_00: @00:00:00.002648  [00:00:00.002,624] <inf> bt_hci_core: HCI transport: Controller
d_00: @00:00:00.002648  [00:00:00.002,624] <inf> bt_hci_core: Identity: FD:9E:B2:48:47:39 (random)
d_00: @00:00:00.002648  [00:00:00.002,624] <inf> bt_hci_core: HCI: version 5.4 (0x0d) revision 0x0000, manufacturer 0x05f1
d_00: @00:00:00.002648  [00:00:00.002,624] <inf> bt_hci_core: LMP: version 5.4 (0x0d) subver 0xffff
d_00: @00:00:00.002648  [Central] Bluetooth initialized
d_00: @00:00:00.002648  [Central] GATT Notify receive forever.
d_00: @00:00:00.003368  [Central] Scanning successfully started
d_00: @00:00:00.088183  [00:00:00.088,165] <wrn> bt_conn: *conn should be unreferenced and initialized to NULL
d_00: @00:00:00.123721  [Central] Updated MTU: TX: 23 RX: 23 bytes
d_00: @00:00:00.123721  [Central] Connected: EB:E9:0E:54:A6:09 (random)
d_00: @00:00:00.175380  [Central] Updated MTU: TX: 247 RX: 247 bytes
d_00: @00:00:00.176556  [Central] Updated MTU: TX: 247 RX: 247 bytes
d_00: @00:00:00.176556  [Central] MTU exchange successful (247)
d_00: @00:00:00.176556  [Central] Discover ...
d_00: @00:00:00.625298  [Central] Discovered attr handle 13
d_00: @00:00:00.625298  [Central] Subscribed to notifications
d_00: @00:00:01.029687  [Central] Notify RX: count= 0, len= 0, rate= 0 bps.
d_00: @00:00:02.034571  [Central] Notify RX: count= 78, len= 19032, rate= 152256 bps.
d_00: @00:00:03.039455  [Central] Notify RX: count= 78, len= 19032, rate= 152256 bps.
d_00: @00:00:04.075223  [Central] Notify RX: count= 78, len= 19032, rate= 152256 bps.
d_00: @00:00:05.075719  [Central] Notify RX: count= 77, len= 18788, rate= 155879 bps.
d_00: @00:00:05.823273  [Central] Conn params updated: int 0x0028 lat 0 to 42
d_00: @00:00:06.075762  [Central] Notify RX: count= 72, len= 17568, rate= 145826 bps.
d_00: @00:00:07.080646  [Central] Notify RX: count= 76, len= 18544, rate= 148352 bps.
d_00: @00:00:08.085530  [Central] Notify RX: count= 76, len= 18544, rate= 148352 bps.
d_00: @00:00:09.090414  [Central] Notify RX: count= 76, len= 18544, rate= 148352 bps.
d_00: @00:00:10.091902  [Central] Notify RX: count= 75, len= 18300, rate= 146897 bps.

Terminal 2:

d_01: @00:00:00.000000  *** Booting Zephyr OS build v4.4.0-4476-ga823bbf7c143 ***
d_01: @00:00:00.000000  [00:00:00.000,000] <inf> bt_hci_core: HW Platform: Nordic Semiconductor (0x0002)
d_01: @00:00:00.000000  [00:00:00.000,000] <inf> bt_hci_core: HW Variant: unknown (0x0002)
d_01: @00:00:00.000000  [00:00:00.000,000] <inf> bt_hci_core: Firmware: Standard Bluetooth controller (0x00) Version 4.4 Build 99
d_01: @00:00:00.000000  [00:00:00.000,000] <wrn> bt_id: No static addresses stored in controller
d_01: @00:00:00.002648  [00:00:00.002,624] <inf> bt_hci_core: HCI transport: Controller
d_01: @00:00:00.002648  [00:00:00.002,624] <inf> bt_hci_core: Identity: EB:E9:0E:54:A6:09 (random)
d_01: @00:00:00.002648  [00:00:00.002,624] <inf> bt_hci_core: HCI: version 5.4 (0x0d) revision 0x0000, manufacturer 0x05f1
d_01: @00:00:00.002648  [00:00:00.002,624] <inf> bt_hci_core: LMP: version 5.4 (0x0d) subver 0xffff
d_01: @00:00:00.002648  [Multirole] Bluetooth initialized
d_01: @00:00:00.002648  [Multirole] [Peripheral] Advertising successfully started
d_01: @00:00:00.002648  [Multirole] [Central] Scanning successfully started
d_01: @00:00:00.002648  [Multirole] Notify relay forever.
d_01: @00:00:00.004908  [00:00:00.004,882] <wrn> bt_conn: *conn should be unreferenced and initialized to NULL
d_01: @00:00:00.043467  [Multirole] Updated MTU: TX: 23 RX: 23 bytes
d_01: @00:00:00.043467  [Multirole] Connected: DD:FD:C1:CE:9A:C0 (random) role 0
d_01: @00:00:00.095724  [Multirole] Updated MTU: TX: 247 RX: 247 bytes
d_01: @00:00:00.095724  [Multirole] MTU exchange successful (247)
d_01: @00:00:00.095724  [Multirole] [Central] Discover ...
d_01: @00:00:00.123736  [Multirole] Updated MTU: TX: 23 RX: 23 bytes
d_01: @00:00:00.123736  [Multirole] Connected: FD:9E:B2:48:47:39 (random) role 1
d_01: @00:00:00.175112  [Multirole] Updated MTU: TX: 247 RX: 247 bytes
d_01: @00:00:00.176288  [Multirole] Updated MTU: TX: 247 RX: 247 bytes
d_01: @00:00:00.176288  [Multirole] MTU exchange successful (247)
d_01: @00:00:00.595076  [Multirole] [Central] Discovered attr handle 13
d_01: @00:00:00.595076  [Multirole] [Central] Subscribed to notifications
d_01: @00:00:00.775112  [Multirole] [Peripheral] Notifications enabled
d_01: @00:00:01.002656  [Multirole] [Peripheral] Notify TX: count= 0, len= 0, rate= 0 bps.
d_01: @00:00:01.049426  [Multirole] [Central] Notify RX: count= 0, len= 0, rate= 0 bps.
d_01: @00:00:02.030084  [Multirole] [Peripheral] Notify TX: count= 78, len= 19032, rate= 153549 bps.
d_01: @00:00:02.053815  [Multirole] [Central] Notify RX: count= 122, len= 29768, rate= 238260 bps.
d_01: @00:00:03.030184  [Multirole] [Peripheral] Notify TX: count= 77, len= 18788, rate= 155874 bps.
d_01: @00:00:03.058699  [Multirole] [Central] Notify RX: count= 123, len= 30012, rate= 240096 bps.
d_01: @00:00:04.030284  [Multirole] [Peripheral] Notify TX: count= 77, len= 18788, rate= 151027 bps.
d_01: @00:00:04.063583  [Multirole] [Central] Notify RX: count= 124, len= 30256, rate= 242048 bps.
d_01: @00:00:05.030384  [Multirole] [Peripheral] Notify TX: count= 77, len= 18788, rate= 151027 bps.
d_01: @00:00:05.068469  [Multirole] [Central] Notify RX: count= 124, len= 30256, rate= 242048 bps.
d_01: @00:00:05.442994  [Multirole] Conn params updated: int 0x0028 lat 0 to 42
d_01: @00:00:05.823792  [Multirole] Conn params updated: int 0x0028 lat 0 to 42
d_01: @00:00:06.030527  [Multirole] [Peripheral] Notify TX: count= 72, len= 17568, rate= 145821 bps.
d_01: @00:00:06.069408  [Multirole] [Central] Notify RX: count= 117, len= 28548, rate= 229286 bps.
d_01: @00:00:07.030627  [Multirole] [Peripheral] Notify TX: count= 75, len= 18300, rate= 151907 bps.
d_01: @00:00:07.073376  [Multirole] [Central] Notify RX: count= 124, len= 30256, rate= 242269 bps.
d_01: @00:00:08.030727  [Multirole] [Peripheral] Notify TX: count= 75, len= 18300, rate= 151907 bps.
d_01: @00:00:08.095980  [Multirole] [Central] Notify RX: count= 125, len= 30500, rate= 244365 bps.
d_01: @00:00:09.030827  [Multirole] [Peripheral] Notify TX: count= 75, len= 18300, rate= 147100 bps.
d_01: @00:00:09.100864  [Multirole] [Central] Notify RX: count= 126, len= 30744, rate= 245952 bps.
d_01: @00:00:10.032339  [Multirole] [Peripheral] Notify TX: count= 75, len= 18300, rate= 146897 bps.
d_01: @00:00:10.105747  [Multirole] [Central] Notify RX: count= 126, len= 30744, rate= 245952 bps.

Terminal 3:

d_02: @00:00:00.000000  *** Booting Zephyr OS build v4.4.0-4476-ga823bbf7c143 ***
d_02: @00:00:00.000000  [00:00:00.000,000] <inf> bt_hci_core: HW Platform: Nordic Semiconductor (0x0002)
d_02: @00:00:00.000000  [00:00:00.000,000] <inf> bt_hci_core: HW Variant: unknown (0x0002)
d_02: @00:00:00.000000  [00:00:00.000,000] <inf> bt_hci_core: Firmware: Standard Bluetooth controller (0x00) Version 4.4 Build 99
d_02: @00:00:00.000000  [00:00:00.000,000] <wrn> bt_id: No static addresses stored in controller
d_02: @00:00:00.002648  [00:00:00.002,624] <inf> bt_hci_core: HCI transport: Controller
d_02: @00:00:00.002648  [00:00:00.002,624] <inf> bt_hci_core: Identity: DD:FD:C1:CE:9A:C0 (random)
d_02: @00:00:00.002648  [00:00:00.002,624] <inf> bt_hci_core: HCI: version 5.4 (0x0d) revision 0x0000, manufacturer 0x05f1
d_02: @00:00:00.002648  [00:00:00.002,624] <inf> bt_hci_core: LMP: version 5.4 (0x0d) subver 0xffff
d_02: @00:00:00.002648  [Peripheral] Bluetooth initialized
d_02: @00:00:00.002648  [Peripheral] Advertising successfully started
d_02: @00:00:00.002648  [Peripheral] GATT Notify forever on connection.
d_02: @00:00:00.043466  [Peripheral] Updated MTU: TX: 23 RX: 23 bytes
d_02: @00:00:00.043466  [Peripheral] Connected: EB:E9:0E:54:A6:09 (random)
d_02: @00:00:00.094824  [Peripheral] Updated MTU: TX: 247 RX: 247 bytes
d_02: @00:00:00.694704  [Peripheral] Notifications enabled
d_02: @00:00:01.002656  [Peripheral] Notify: count= 0, len= 0, rate= 0 bps.
d_02: @00:00:02.004305  [Peripheral] Notify: count= 117, len= 28548, rate= 229125 bps.
d_02: @00:00:03.004625  [Peripheral] Notify: count= 122, len= 29768, rate= 239239 bps.
d_02: @00:00:04.009409  [Peripheral] Notify: count= 124, len= 30256, rate= 242070 bps.
d_02: @00:00:05.014192  [Peripheral] Notify: count= 124, len= 30256, rate= 242070 bps.
d_02: @00:00:05.442444  [Peripheral] Conn params updated: int 0x0028 lat 0 to 42
d_02: @00:00:06.015108  [Peripheral] Notify: count= 117, len= 28548, rate= 229293 bps.
d_02: @00:00:07.019398  [Peripheral] Notify: count= 124, len= 30256, rate= 242195 bps.
d_02: @00:00:08.022770  [Peripheral] Notify: count= 125, len= 30500, rate= 244365 bps.
d_02: @00:00:09.046757  [Peripheral] Notify: count= 126, len= 30744, rate= 245982 bps.
d_02: @00:00:10.051541  [Peripheral] Notify: count= 126, len= 30744, rate= 245982 bps.

@cvinayak
samples: Bluetooth: Central plus Peripheral with notifications
a823bbf 
Add three new Bluetooth samples:
- peripheral_gatt_notify: Peripheral that sends GATT notifications
- central_notify_receive: Central that receives GATT notifications
- central_peripheral_notify_send_receive: Central plus Peripheral

Add bsim CI test tests/bsim/bluetooth/host/multirole_gatt_relay to
verify the 3-device notification relay topology under simulation.

Assisted-by: GitHub CoPilot: Claude Opus 4.6
Signed-off-by: Vinayak Kariappa Chettimada <vich@nordicsemi.no>
@sonarqubecloud

sonarqubecloud Bot commented Jun 6, 2026

Copy link
Copy Markdown

Quality Gate Passed Quality Gate passed

Issues
4 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud

@cvinayak
cvinayak marked this pull request as ready for review June 6, 2026 05:18
@zephyrbot zephyrbot added area: Tests Issues related to a particular existing or missing test platform: nRF BSIM Nordic Semiconductors, nRF BabbleSim area: Bluetooth Host Bluetooth Host (excluding BR/EDR) area: Samples Samples area: Bluetooth labels Jun 6, 2026
@Thalley

Thalley commented Jun 8, 2026

Copy link
Copy Markdown
Contributor

@cvinayak What are the purpose of these samples? We already have samples that perform these GATT operations, do we not?

@cvinayak

cvinayak commented Jun 8, 2026

Copy link
Copy Markdown
Contributor Author

The sample is intended to cover multirole usecase similar to wireless split keyboards; analysis related to zmkfirmware/zmk#3370 (comment)

I suspect regression in Zephyr Bluetooth Controller after v3.5.0.

@Thalley

Thalley commented Jun 9, 2026 •
edited
Loading

Copy link
Copy Markdown
Contributor

The sample is intended to cover multirole usecase similar to wireless split keyboards; analysis related to zmkfirmware/zmk#3370 (comment)

I suspect regression in Zephyr Bluetooth Controller after v3.5.0.

The multi-role response somewhat covers why the central_peripheral_notify sample is being added, but why the other 2?

And if this is to find and fix a regression, wouldn't it be better with just a test rather than a sample that more or less just does the same as other samples we have?

Thalley
Thalley requested changes Jun 23, 2026
View reviewed changes

@Thalley Thalley left a comment

Copy link
Copy Markdown
Contributor

Choose a reason for hiding this comment

The reason will be displayed to describe this comment to others. Learn more.

There is a lack of rationale behind adding these samples IMO

@github-actions

github-actions Bot commented Jul 24, 2026

Copy link
Copy Markdown

This pull request has been marked as stale because it has been open (more than) 30 days with no activity. Remove the stale label or add a comment saying that you would like to have the label removed otherwise this pull request will automatically be closed in 7 days. Note that if it gets closed, you can ask someone to reopen it for you if you do not have the permissions to do so.

@github-actions github-actions Bot added the Stale label Jul 24, 2026
@github-actions github-actions Bot closed this Jul 31, 2026
Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment

Reviewers

@Thalley Thalley Thalley requested changes
@aescolar aescolar Awaiting requested review from aescolar
@alwa-nordic alwa-nordic Awaiting requested review from alwa-nordic
@alxelax alxelax Awaiting requested review from alxelax
@HaavardRei HaavardRei Awaiting requested review from HaavardRei
@hermabe hermabe Awaiting requested review from hermabe
@JarmouniA JarmouniA Awaiting requested review from JarmouniA
@jhedberg jhedberg Awaiting requested review from jhedberg
@kartben kartben Awaiting requested review from kartben
@nashif nashif Awaiting requested review from nashif
@rugeGerritsen rugeGerritsen Awaiting requested review from rugeGerritsen
@sjanc sjanc Awaiting requested review from sjanc

Assignees

@jhedberg jhedberg

@alwa-nordic alwa-nordic

Labels

area: Bluetooth Host Bluetooth Host (excluding BR/EDR) area: Bluetooth area: Samples Samples area: Tests Issues related to a particular existing or missing test platform: nRF BSIM Nordic Semiconductors, nRF BabbleSim Stale

Projects

None yet

Milestone

No milestone

Development

Successfully merging this pull request may close these issues.

5 participants

@cvinayak @Thalley @jhedberg @zephyrbot @alwa-nordic