Trigger when you are kilometers/miles from a location

[paps93fr]

Hi there,

MD have Geofence triggers but they are 5 kms max adjustable from a position.

How to know when I'm hundreds of km/ml away, for example from home ?

I want to create some presence routines but I need to know - and differentiate - when i'm out of my home region, from just being out of my street or city.

I would like to know, for example, when I am 150 or 200 km from home.

 

[Dm114]

Hi there,

MD have Geofence triggers but they are 5 kms max adjustable from a position.

How to know when I'm hundreds of km/ml away, for example from home ?

I want to create some presence routines but I need to know - and differentiate - when i'm out of my home region, from just being out of my street or city.

I would like to know, for example, when I am 150 or 200 km from home.

Unless you create Geofence areas for these distances, I'm afraid there's no other way to achieve that.

 

[paps93fr]

I answer to myself and to anyone interested.

I've found formulas in this website:

Fonction mathématique Coordonnées GPS

float a; float lat1; float lat2; float lon1; float lon2; float t1; float t2; float t3; float t4; float t5; float rad_dist; void setup() { Serial.begin(9600); // use the serial port } void loop() { distance(43.838489, 4.349213, 44.131957, 4.085541); delay(1000); } void...

forum.arduino.cc

Translated in MD (first image in French, last in English):




Seem working well.

Coordinates are string variables like this:


Which are manipulated to convert them into decimal array:

 

[Dm114]

I answer to myself and to anyone interested.

I've found formulas in this website:

Fonction mathématique Coordonnées GPS

float a; float lat1; float lat2; float lon1; float lon2; float t1; float t2; float t3; float t4; float t5; float rad_dist; void setup() { Serial.begin(9600); // use the serial port } void loop() { distance(43.838489, 4.349213, 44.131957, 4.085541); delay(1000); } void...

forum.arduino.cc

Translated in MD (first image in French, last in English):
View attachment 7421

View attachment 7422

Seem working well.

Coordinates are string variables like this:
View attachment 7423

Which are manipulated to convert them into decimal array:
View attachment 7424

Ha, ha... Well done

I didn't dare to suggest this method because:
- calculation is a bit long and
- the result is given for a straight line, we no curves

To minimize the inconvenience of the last point, you could apply a percentage to increase the calculated distance, depending on the kind of roads you are driving on.

For those who are interested, here's the Wikipedia link:

Great-circle distance - Wikipedia

en.m.wikipedia.org

 

[paps93fr]

To minimize the inconvenience of the last point, you could apply a percentage to increase the calculated distance, depending on the kind of roads you are driving on.

Thank you. For my today's use - to see if I'm far away from home or not - that first version will be okay. But I note that point if my use case change.

 

[Dm114]

Thank you. For my today's use - to see if I'm far away from home or not - that first version will be okay. But I note that point if my use case change.

I just uploaded to the Template Store an old macro now converted to Action Block (it didn't exist yet at this time ) to calculate the distance between 2 GPS points (if it can help you)...

https://www.macrodroidlink.com/macrostore?id=19028