This tutorial mainly introduces how to simulate data upload by using API testing tool.     **Hardware**   No hardware is required. Only simulate data upload by API testing tool  provided by Devicebit platform.   **Procedure：**   1 Register Devicebit Account (www.devicebit.com)      Pic.1  Sign Up    2 Add ***My Device, Sensors: Humidity and Temperature*** (The steps are as follows. Note: note down the ID, for it will be used in Api calling.)      2.1 Add A Device     After login, go to My Devices -> Devices->Add a Device      First, click on Devices  -> Add A Device , as the picture1 below. After entering the related  information, click on Save.    Pic.2 Add A Device          2.2 Add Humidity            The next step is to add the humidity sensor. Go to** *My Devices-> Sensors&Controllers->Sensor***, click on ***Add****.*    Pic.3  Sensors                 Then there will be the ***Add A Sensor*** page.       Pic.4  Add Humidity         As the above picture shows, enter Humidity for ID (Note down the  **ID** for it will be used in Api calling). Select **Humidity  Monitoring** for ***Type***. Seclet % for ***Unit*** . Select My Device which is created previously. Enter **Humidity ***for** Name***. If you want others could view the humidity data, tick ***Yes*** for ***Public*** item.   2.3 Add Temperature           Add the ***Temperature*** sensor in the same way. Please see the following picture.      Pic.5  Add Temperature               After setting up, as picture 5 shows, note down the ***ID*** because it will be used in Api calling.     Pic.6  Sensor ID    3 Now, let's move on to simulate data upload by using Api testing tool.      At the home page (the website is www.devicebit.com) click on ***Documentation***   Pic.7  Home Page    and then go to **API Directory-> Sensor ->Upload Sensor Data**      Pic.8  API Directory      Website http://www.devicebit.com/dev/apiList?version=1&sk=69                http://www.devicebit.com/dev/apitest/3    Pic.9 On-line test    Click on ***on-line test***    Pic.10  API Testing Tool  Enter your **Userkey**  Enter ***Device ID*** at API URL  http://www.devicebit.com/api/V1/gateway/UpdateSensors/{device ID} [（01 for exampe）](http://www.lewei50.com/api/V1/gateway/UpdateSensors/%E4%BD%A0%E7%9A%84%E7%BD%91%E5%85%B3%E5%8F%B7)   After entering the device ID, the APIURL is: http://www.devicebit.com/api/V1/gateway/UpdateSensors/01      Pic.11  Userkey & Device No.    Change ***T1*** to ***Temperature*** for ***Name***; change ***1*** to ***32*** for **Value***;    Change ***01H1*** to ***Humidity*** for ***Name***; change ***96.2***  to ***75*** for ***Value***.     Pic.12  Post Data   Click on ***Run***, and then the request detail will be displayed.    Pic.13  Request Detail            At last, Go to ***My IOT -> Sensors&Controllers->Sensor List***, you will see the following value.    Pic.14  The Value      Well Done! Your data upload is successfully simulated by using API testing tool!