Jackson-gjh opened a new pull request, #3989:
URL: https://github.com/apache/nuttx-apps/pull/3989
## Summary
Add a reusable Apache NimBLE Environmental Sensing peripheral example.
## Features
- Advertises the standard Environmental Sensing service (`0x181a`).
- Exposes Temperature (`0x2a6e`) as signed little-endian hundredths of a
degree Celsius.
- Exposes Humidity (`0x2a6f`) as unsigned little-endian hundredths of a
percent.
- Supports GATT reads and notifications for both characteristics.
- Generates slowly changing sample values, so no sensor hardware is required.
- Separates GAP, GATT, and application code to make adaptation easier.
- Supports both CMake and Make application builds.
The example is intentionally named `nimble_bleess` rather than after the
ESP32-C6 validation board. It has no board-register or sensor-driver
dependency and can be reused by any NuttX target with a NimBLE peripheral
configuration.
## Usage
Enable `CONFIG_EXAMPLES_NIMBLE_BLEESS` and run:
```text
nsh> bleess
```
An optional numeric argument selects the HCI device:
```text
nsh> bleess 0
```
## Testing
Hardware and software:
- NuttX Apps base `b3d9d96bffab084de8f512e59abf2cc935124330`
- NuttX `43f7f34b9958283b4403789c9bc21df920fd3143`
- Apache NimBLE `31bb46e2`
- ESP32-C6 revision v0.2
- Windows Bleak client
The CMake build completed successfully and produced an ESP32-C6 image. The
image was flashed and the application advertised as `NuttX NimBLE ESS`.
The client discovered and connected to the device, found service `0x181a`,
read both characteristic values, subscribed to both CCC descriptors, and
received notifications from both characteristics:
```text
found=NuttX NimBLE ESS address=AC:EB:E6:C1:14:26
connected=True
temperature_read=24.08
humidity_read=50.16
humidity_notify=50.18
temperature_notify=24.09
result=PASS
```
Device output confirmed MTU exchange and both subscriptions:
```text
GAP connect: status=0
ATT MTU: conn=0 mtu=256
GATT subscribe: attr=16 notify=1 indicate=0
GATT subscribe: attr=19 notify=1 indicate=0
```
`nxstyle` passed for all C and header files.
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