https://github.com/allyndawn/bluethermdevice
A Bluetooth Low Energy thermometer that implements the Environmental Sensing service and Temperature characteristic.
https://github.com/allyndawn/bluethermdevice
ble bluetooth ds18b20 nrf52 nrf52840
Last synced: 3 months ago
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A Bluetooth Low Energy thermometer that implements the Environmental Sensing service and Temperature characteristic.
- Host: GitHub
- URL: https://github.com/allyndawn/bluethermdevice
- Owner: allyndawn
- License: mit
- Created: 2020-12-26T00:59:25.000Z (over 4 years ago)
- Default Branch: main
- Last Pushed: 2020-12-27T18:36:51.000Z (over 4 years ago)
- Last Synced: 2025-01-06T04:12:54.570Z (5 months ago)
- Topics: ble, bluetooth, ds18b20, nrf52, nrf52840
- Language: C++
- Homepage: https://allen.blog
- Size: 2.69 MB
- Stars: 2
- Watchers: 2
- Forks: 0
- Open Issues: 0
-
Metadata Files:
- Readme: README.md
- License: LICENSE
Awesome Lists containing this project
README
# BlueThermDevice
A Bluetooth Low Energy (BLE) thermometer that implements
- the Environmental Sensing Service (ESS, UUID 0x181A)
- the Temperature characteristic (UUID 0x2A6E)
## Hardware
- Maxim Integrated DS18B20 Programmable Resolution 1-Wire Digital Thermometer - https://datasheets.maximintegrated.com/en/ds/DS18B20.pdf
- Adafruit Feather nRF52840 Express - https://www.adafruit.com/product/4062
- Pull up resistor, 4.7K
## Schematic
## Software
- Board Support Package for the nRF52840 - https://learn.adafruit.com/introducing-the-adafruit-nrf52840-feather/arduino-bsp-setup
- Arduino IDE 1.8 or newer - https://www.arduino.cc/en/Main/Software
## Sample Output (Tools > Serial Monitor)
### Not connected to a cental
```
Not connected
4F 1 4B 46 7F FF C 10 46
Temperature: 69.688
BLE:2D 8
Not connected
4F 1 4B 46 7F FF C 10 46
Temperature: 69.688
BLE:2D 8
Not connected
4F 1 4B 46 7F FF C 10 46
Temperature: 69.688
BLE:2D 8
Not connected
4F 1 4B 46 7F FF C 10 46
Temperature: 69.688
BLE:2D 8
```
### Connected to a central
```
Connected, sending notification
58 1 4B 46 7F FF C 10 E8
Temperature: 70.700
BLE:66 8
Connected, sending notification
50 1 4B 46 7F FF C 10 E8
Temperature: 69.800
BLE:34 8
Connected, sending notification
50 1 4B 46 7F FF C 14 E8
Temperature: 69.800
BLE:34 8
Connected, sending notification
50 1 4B 46 7F FF C 10 E8
Temperature: 69.800
BLE:34 8
```
## How It Appears to a Central (e.g. LightBlue by PunchThrough)
