[Backlogmanager] [FIWARE-JIRA] (HELP-15411) [fiware-stackoverflow] How to send commands to iot-sensors using android application

[Fernando Lopez (JIRA)]

     [ https://jira.fiware.org/browse/HELP-15411?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Fernando Lopez reassigned HELP-15411:
-------------------------------------

    Assignee: Jason Fox

> [fiware-stackoverflow] How to send commands to iot-sensors using android application
> ------------------------------------------------------------------------------------
>
>                 Key: HELP-15411
>                 URL: https://jira.fiware.org/browse/HELP-15411
>             Project: Help-Desk
>          Issue Type: Monitor
>          Components: FIWARE-TECH-HELP
>            Reporter: Backlog Manager
>            Assignee: Jason Fox
>              Labels: fiware, fiware-orion
>
> Created question in FIWARE Q/A platform on 01-02-2019 at 18:02
> {color: red}Please, ANSWER this question AT{color} https://stackoverflow.com/questions/54484127/how-to-send-commands-to-iot-sensors-using-android-application
> +Question:+
> How to send commands to iot-sensors using android application
> +Description:+
> I setup an the fiware201:iot-sensor inside an Ubuntu 16.04 instance on FIWARE-lab , and am currently building an android application to be able to send commands to access the dummy devices provided by the context provider , i setup a class that formats the data and sends it to the endpoint provided by the tutorial , but i cant seem to get it to work , i get a 422 error whenever i try to send any command.
> additional details:
> i am using volley -> a package to send post,get requests in android
> fiware-lab region : crete
> here is the code:
> import android.content.Context;
> import android.util.Log;
> import com.android.volley.AuthFailureError;
> import com.android.volley.Request;
> import com.android.volley.RequestQueue;
> import com.android.volley.Response;
> import com.android.volley.VolleyError;
> import com.android.volley.toolbox.StringRequest;
> import com.android.volley.toolbox.Volley;
> import java.util.HashMap;
> import java.util.Locale;
> import java.util.Map;
> public class ApiController {
>     private String urlString
>     public String serverResponse;
>     private RequestQueue queue ;
>     public ApiController(Context context) {
>         //set context variables if required
>         serverResponse = "";
>         queue = Volley.newRequestQueue(context);
>     }
>     public void setDevice(String device) {
>         this.device = device;
>         urlString = "http://myFloatingIp:3001/iot/" +"Lamp001"; // URL to call
> }
>     public void send() {
>         String uri = String.format(Locale.US, urlString);
>         // Request a string response from the provided URL.
>         StringRequest stringRequest = new StringRequest(Request.Method.POST,uri,
>                 new Response.Listener<String>() {
>                     @Override
>                     public void onResponse(String response) {
>                                serverResponse = response;
>                     }
>                 }, new Response.ErrorListener() {
>             @Override
>             public void onErrorResponse(VolleyError error) {
>               serverResponse = "Error";
>             }
>         }
>                       ) {
>             @Override
>             protected Map<String, String> getParams() throws AuthFailureError {
>                 Map<String,String> params=new HashMap<String,String>();
>                 params.put("data","urn:ngsi-ld:Lamp:001"@On");
>                 return params;
>             }
>             @Override
>             public Map<String, String> getHeaders() throws AuthFailureError {
>                 Map<String,String> headers=new HashMap<String,String>();
>                 headers.put("Content-Type","text/plain");
>                 return headers;
>             }
>         };
> // Add the request to the RequestQueue.
>         queue.add(stringRequest);
>     }
> }



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