Need help for error: "Invalid '$.Toybox.Lang.Object' passed as parameter 1 of type '$.Toybox.BluetoothLowEnergy.Device'."

Are you sure there's even one paired when this is called?

If Ble.getPairedDevives() is null, you'd be doing a next() on null

It's best to do something like

var device=null;
var iter=Ble.getPairedDevices();
if(iter!=null) {
    device=iter.next();
    //other stuff    
}

Good point!
I changed the code as follows:

jim_m_58 said:

If Ble.getPairedDevives() is null, you'd be doing a next() on null

But according to the Monkey C docs, getPairedDevices() always returns a BluetoothLowEnergy.Iterator (and not null). (I realize reality may be different, but in that case, the documentation is wrong.)

CYBERMAN54 said:

What's wrong with this snippet of code? Compiler complains the _device parameter. But i can't see my error. Code belongs to a BLE delegate.

BluetoothLowEnergy.Iterator.next() returns an Object or Null, not BluetoothLowEnergy.Device. Whether or not this is seen as a bug/limitation in the API, I think your only choice is to change the code to do an explicit cast. e.g.:

device = iter.next();
if (device != null) {
  Ble.unpairDevice(device as BluetoothLowEnergy.Device);
  //...
}

Thanks, the compiler now takes this. Without your hint i never would have solved this. Monkey C is a strange language...

Alternatively you could turn off type checking with the runtime parameter -l0

Still fighting with the types, now for BLE ScanResults...

Turn off type checking, and make sure things still compile Type checking is on by default with the beta compiler..

If you want to use type checking, see this https://forums.garmin.com/developer/connect-iq/b/news-announcements/posts/the-road-to-strict-typing-is-paved-with-good-intentions

as well as this.

https://developer.garmin.com/connect-iq/monkey-c/monkey-types/

It's the same problem as before: the iterator returns a generic Object, but you need a specific type -- in this case, BluetoothLowEnergy.ScanResult.

Try this (add the bolded line):

Invalid '$.Toybox.Lang.Dictionary{:period as $.Toybox.Lang.Number, :order as $.Toybox.Lang.Boolean}' passed as parameter 1 of type 'PolyType<Null or {:period as Null or $.Toybox.Lang.Number or $.Toybox.Time.Duration, :order as $.Toybox.SensorHistory.Order}>'.

Similar issue after using the SDK 4.1.6 to export my project.I have turned off the type check.

If I change the sdk version to 4.1.5. it works fine.

You are passing a Boolean where the compiler expects a parameter of type $.Toybox.SensorHistory.Order. Change the value from true to SensorHistory.ORDER_OLDEST_FIRST and the warning will go away.

It looks like you can also use a type cast to tell the compiler the value you are passing is of a specific type.

var bodybatt = Toybox.SensorHistory.getBodyBatteryHistory({
    :period => 1,
    :order => 1 as SensorHistory.Order,
});