How to create Environmental Sensing service (UUID 0x181A) display Temperature and Humidity

[Giang]

Hi all ,

I have SHT31 and I can read Temperature and Humidity value by NRF52 . But I want to create 1 service for display it on smart phone with the RH (name: Humidity, UUID: 0x2A6F) and temperature (name: Temperature Measurement, UUID: 0x2A1C) characteristics  . So , have any example for that ? Thank for help !

[Martin Lesund]

Hello Giang,

 

Please check out this Tutorial made by Bjorn. It shows you in step 5 how you can read out the temperature data via TWI and you could use the "ble_app_uart" example as reference on how to send the temperature data to a central (phone etc..)

You can also check out this "custom_ble_service" example on how to make custom BLE services.

[Giang]

Hi , can you help me?

I have Temperature Characteristic , but , I don't display temperature value correct on smart phone . It here : 

https://www.bluetooth.com/specifications/gatt/viewer?attributeXmlFile=org.bluetooth.characteristic.temperature.xml

. It show me temperature is sint16 type . And I dont know display this type in C . If I want to display 40*C . Can you show me have to what is send to smart phone ? Thank