# About the How to get started category **URL:** \ **Category:** How to get started\ **Created:** [September 8, 2015, 8:25am UTC](https://www.thethingsnetwork.org/forum/t/about-the-how-to-get-started-category/12 "2015-09-08T08:25:00Z")\ **Posts on this page:** 9\ **Page:** 1
**Author:** ![wienkegiezeman](https://www.thethingsnetwork.org/forum/user_avatar/www.thethingsnetwork.org/wienkegiezeman/32/48495_2.png) [@wienkegiezeman](https://www.thethingsnetwork.org/forum/u/wienkegiezeman)\ **Post date:** [September 8, 2015, 8:25am UTC](https://www.thethingsnetwork.org/forum/t/about-the-how-to-get-started-category/12/1 "2015-09-08T08:25:00Z")
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**Author:** ![Passepartout](https://www.thethingsnetwork.org/forum/user_avatar/www.thethingsnetwork.org/passepartout/32/35697_2.png) [@Passepartout](https://www.thethingsnetwork.org/forum/u/Passepartout)\ **Post date:** [November 22, 2020, 12:07pm UTC](https://www.thethingsnetwork.org/forum/t/about-the-how-to-get-started-category/12/3 "2020-11-22T12:07:58Z")
Hello, I’m using an RN2483 together with a PIC and a temperature/humidity sensor. The RN2483 is transmitting 2 bytes for temperature and 2 bytes for humidity. I can see the data at the TTN console. The payload is 12 34 56 78 for example. Now I want to transmit the data to Cayenne and show the temperature and the humidity. How to do? Where do I have to implement the formula to convert from 16 bit to float? ---
**Author:** ![kersing](https://www.thethingsnetwork.org/forum/user_avatar/www.thethingsnetwork.org/kersing/32/44777_2.png) [@kersing](https://www.thethingsnetwork.org/forum/u/kersing)\ **Post date:** [November 22, 2020, 12:52pm UTC](https://www.thethingsnetwork.org/forum/t/about-the-how-to-get-started-category/12/4 "2020-11-22T12:52:27Z")
You need to format the data on the node using the [LPP format](https://developers.mydevices.com/cayenne/docs/lora/#lora-cayenne-low-power-payload-data-types). This basically involves adding a few ‘header’ bytes to each value and making sure it uses the right precision. For instance for the temperature you use (hex values): 01 67 00 FF (channel 1, temperature, 25.5 C) ---
**Author:** ![Passepartout](https://www.thethingsnetwork.org/forum/user_avatar/www.thethingsnetwork.org/passepartout/32/35697_2.png) [@Passepartout](https://www.thethingsnetwork.org/forum/u/Passepartout)\ **Post date:** [November 22, 2020, 1:22pm UTC](https://www.thethingsnetwork.org/forum/t/about-the-how-to-get-started-category/12/5 "2020-11-22T13:22:55Z")
Thanks for the hints. So in my application I have to calculate the temperature/humidity (for example +20.4 / 45.6), multiply them by ten, put these values in 2 bytes (temperature) and 1 byte (humidity), in TTN payload decoder I have to add some header according the LPP format and that’s it? ---
**Author:** ![Passepartout](https://www.thethingsnetwork.org/forum/user_avatar/www.thethingsnetwork.org/passepartout/32/35697_2.png) [@Passepartout](https://www.thethingsnetwork.org/forum/u/Passepartout)\ **Post date:** [November 22, 2020, 1:25pm UTC](https://www.thethingsnetwork.org/forum/t/about-the-how-to-get-started-category/12/6 "2020-11-22T13:25:38Z")
Or must all be done in my sensor-node before sending data to TTN via LoRaWAN? ---
**Author:** ![kersing](https://www.thethingsnetwork.org/forum/user_avatar/www.thethingsnetwork.org/kersing/32/44777_2.png) [@kersing](https://www.thethingsnetwork.org/forum/u/kersing)\ **Post date:** [November 22, 2020, 1:52pm UTC](https://www.thethingsnetwork.org/forum/t/about-the-how-to-get-started-category/12/7 "2020-11-22T13:52:24Z")
> [@Passepartout](#): > > So in my application I have to calculate the temperature/humidity No you need to do this on the node. You can not manipulate the data in the application. The data sent over LoRaWAN should be in LPP format. ---
**Author:** ![Passepartout](https://www.thethingsnetwork.org/forum/user_avatar/www.thethingsnetwork.org/passepartout/32/35697_2.png) [@Passepartout](https://www.thethingsnetwork.org/forum/u/Passepartout)\ **Post date:** [November 22, 2020, 1:56pm UTC](https://www.thethingsnetwork.org/forum/t/about-the-how-to-get-started-category/12/8 "2020-11-22T13:56:29Z")
Let me summarize: - take the measurement in my node. - transvert the data in the LPP format - transmit that tarnsverted data via TTN to Cayenne - add a device in mydevice with the keys of my node/RN2483 - Cayenne will show the data That’s wright? ---
**Author:** ![kersing](https://www.thethingsnetwork.org/forum/user_avatar/www.thethingsnetwork.org/kersing/32/44777_2.png) [@kersing](https://www.thethingsnetwork.org/forum/u/kersing)\ **Post date:** [November 22, 2020, 4:40pm UTC](https://www.thethingsnetwork.org/forum/t/about-the-how-to-get-started-category/12/9 "2020-11-22T16:40:06Z")
Yes that is the right way to do it. ---
**Author:** ![Passepartout](https://www.thethingsnetwork.org/forum/user_avatar/www.thethingsnetwork.org/passepartout/32/35697_2.png) [@Passepartout](https://www.thethingsnetwork.org/forum/u/Passepartout)\ **Post date:** [November 22, 2020, 5:28pm UTC](https://www.thethingsnetwork.org/forum/t/about-the-how-to-get-started-category/12/10 "2020-11-22T17:28:55Z")
Many thanks, I got it working as I wanted.