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

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

Martin Lesund — Thu, 05 Apr 2018 12:53:19 GMT

Hi Giang,

Sorry for the delay. Have you found a solution or do you have any updates to this case you could share?

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

Giang — Fri, 23 Mar 2018 08:46:03 GMT

hi i use android with nrf connect . It is requirement of me . I created custom service and can display humidity value corect. It is uint16 type , but temperature is sint16 type . And you can help me display correct

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

Martin Lesund — Fri, 23 Mar 2018 08:36:23 GMT

What app do you use to read out the data sent from the peripheral?

I assume you have checked out the "custom_ble_service" tutorial and understand how BLE work described in the BLE tutorials? (specifically the Characteristics tutorial)

If you want to display the numbers another way, I think the best way to do it on the Central side.

(similar project)

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

Giang — Thu, 22 Mar 2018 07:03:16 GMT

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

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

Martin Lesund — Tue, 20 Mar 2018 13:22:05 GMT

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.