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RFduino not pulling NMEA strings from GPS


RFduino not pulling NMEA strings from GPS

By : DazzaRPD
Date : November 17 2020, 11:55 AM
I wish this help you One problem I see: the loop() is trying to read out the GPS coordinates every time loop is executed. This approach has two problems: 1) the loop doesn't wait until serial data is ready, and 2) the loop doesn't wait until the received GPS data is valid.
From reading http://arduino.cc/en/Tutorial/ReadASCIIString and http://arduiniana.org/libraries/tinygps/ I recommend rewriting loop() to something like this:
code :
loop() {
  char c;
  float fLat, fLon;
  unsigned long fix_age;
  static unsigned long previous_fix_age = 0;

  // If nothing to read; do nothing.
  // Read as many characters as are available.
  while (Serial.available() > 0) {

    // Tell the GPS library about the new character.
    c = Serial.read();
    gps.encode(c);

    gps.f_get_position(&flat, &flon, &fix_age);
    if (fix_age != TinyGPS::GPS_INVALID_AGE && fix_age != previous_fix_age) {
      // new GPS data is valid, new, and ready to be printed

      previous_fix_age = fix_age; // remember that we've reported this data.

      String latString = String(lat);
      ...the rest of the code you already have to print the lat and lon.
    }

  }
}


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GPS Driver for .Net/C# for Pulling GPS Data From Any NMEA-Capable GPS Unit

GPS Driver for .Net/C# for Pulling GPS Data From Any NMEA-Capable GPS Unit


By : shiv gupta
Date : March 29 2020, 07:55 AM
Does that help You don't really want a driver, you want a parser. The driver is what handles making it (almost always) a com port, and is device specific. The parser interprets the actual NMEA formatted data. Look at this parser project
http://code.google.com/p/nmeasharp/wiki/NmeaSharpMain
Handling data from external Bluetooth device with GPS NMEA strings

Handling data from external Bluetooth device with GPS NMEA strings


By : Peter Kiraly
Date : March 29 2020, 07:55 AM
hope this fix your issue Solution: I used mock locations. At the moment it is not possible to avoid GPS NMEA string parsing.
Code:
code :
String mocLocationProvider = LocationManager.GPS_PROVIDER;
mLocationManager = (LocationManager) getSystemService(LOCATION_SERVICE);
mLocationManager.addTestProvider(mocLocationProvider, false, false, false, false, true, true, false, Criteria.POWER_LOW, Criteria.ACCURACY_HIGH);
mLocationManager.setTestProviderEnabled(mocLocationProvider, true);
mLocationManager.setTestProviderStatus(mocLocationProvider, LocationProvider.AVAILABLE, null, System.currentTimeMillis());

//update location
Location mCurrentLocation = new Location(mocLocationProvider);
                           mCurrentLocation.setLatitude(mGPSCurrLat);
                           mCurrentLocation.setLongitude(mGPSCurrLon);
                           mCurrentLocation.setAccuracy(1);
                           mCurrentLocation.setTime(mGPSCurrTimeUTC); //long getTime() from UTC string
                           mCurrentLocation.setElapsedRealtimeNanos(SystemClock.elapsedRealtimeNanos());

mLocationManager.setTestProviderLocation(mocLocationProvider, mCurrentLocation);
Send data over BLE with RFDuino

Send data over BLE with RFDuino


By : airmigjr
Date : March 29 2020, 07:55 AM
hope this fix your issue RFduino sends floats in little endian. Your android app will receive it as 4 bytes and you will need to convert it to big endian by reversing the order of the bytes (and converting to float). There's several threads on the topic, eg. Converting Little Endian to Big Endian and the one you used.
It should just be a quick read up on endianness and floating point format to understand the logic behind it. But basically, the 4 byte float has the bytes stored in reverse order of each other in little vs. big endian. When you reverse the 4 bytes in little endian then it becomes big endian and you're good to go for your situation.
Receiving iBeacon signal by RFduino

Receiving iBeacon signal by RFduino


By : Ycy
Date : March 29 2020, 07:55 AM
seems to work fine After long time research AND try and fail, the short answer NO.
More details
Bluetooth Low Energy: RFDuino is not detected

Bluetooth Low Energy: RFDuino is not detected


By : Tanmoy Biswas
Date : March 29 2020, 07:55 AM
I wish did fix the issue. The scanning code looks okay in my opinion.
Some things to check:
code :
android.permission.BLUETOOTH

android.permission.BLUETOOTH_ADMIN
android.permission.ACCESS_COARSE_LOCATION
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