Get the location info from Google API and Show location on Map widget

Need Help With My Project
1

Dear All,

Can you please help me with getting the location information from Google Geolocation API and Show location on Map widget in the Blynk app?

I am using Arduino Yun with iOS Blynk app.

https://www.googleapis.com/geolocation/v1/geolocate?key=YOUR_API_KEY

#define BLYNK_PRINT Serial

#define BLYNK_MAX_READBYTES 4096

#include <Bridge.h>
#include <BlynkSimpleYun.h>


char auth[] = "4730d34a23444444818656b8424399b95a";

WidgetTerminal terminal(V1);

BLYNK_WRITE(V17)
{
    String webhookdata = param.asStr();
    yield();
   if((webhookdata.length() > 1) && (webhookdata.length() < 4096)){ 

  Serial.println("WebHook data:");
  Serial.println(param.asStr());
  Serial.print("Data size: ");
  Serial.println(webhookdata.length()); 
    terminal.println(webhookdata);
    terminal.print("Data size: ");
    terminal.println(webhookdata.length());
    terminal.flush(); 
    webhookdata = "";
    yield();
   }
    
    else{}
    Serial.println("Unknown problem");
    terminal.print("Unknown problem");
     Serial.println(webhookdata);
     Serial.println(webhookdata.length());
    }
          }
        }
            void setup()
            {
              // Debug console
              Serial.begin(9600);

              Blynk.begin(auth);

              // If you want to remove all points:
              //myMap.clear();

              //int index = 1;
              //float lat = 41.9;
              //float lon = 2.2;
              
              myMap.location(index, lat, lon, "value");
            }

            void loop()
            {
              Blynk.run();
            }

I am not sure how to get the webhook data from POST request and to assign lat and lon info to Map widget.

Any help is appreciated…

2

@devecihalil GET was modified to accept POST requests so I never use POST.

If you are trying to send 4096 character to Terminal you will also need SENDBYTES but with SENDBYTES and READBYTES I have never been able to go above around 2000.

Personally I would forget any attempt to send this to Terminal, use Serial Monitor to start with.

Google json parsing with the Arduinojson library.

3

I have tried to use both POST and GET.

I removed also Terminal lines and working only with Serial monitor.

Somehow Google geolocation API does not seem to work in this way. I believe it requires Request body containing all Cell Tower objects or wifi access point objects.

I really would like to find a way to get the geolocation data without using any GPS or GSM module.

Do you think maybe is there a way to manage it?

Thanks…

4

@devecihalil with my own API key and a MAC address of an AP located somewhere in California I was able to get some results with the API. I couldn’t work out how to use the MAC address of my AP or that of my ISP though.

5

it is also working for me if i make a POST or GET Geolocation request with “Request Body”.

But my aim is to make the request without any cell tower or wifi access point objects. (https://www.googleapis.com/geolocation/v1/geolocate?key=YOUR_API_KEY)

I am trying to understand if it is technically possible. When I try to use any HTTP requester program in the web browser, I can easily get a response without having to use any additional “Request Body”
Something like this:
{
“location”: {
“lat”: 46.9743,
“lng”: 14.2542803
},
“accuracy”: 3956.0
}

I believe that there should be a way to get a similar response only by using Arduino YUN and this API without any additional GSM or GPS shield.

Any help or comment appreciated

Thanks…