I designed an application for my car.
I need to launch the application of the rear camera car when I switch on the rear lights and return to my appinventor application when rear lights are switch off.
I'm searching with notifier but I didn't find how.
Thanks for your help.
From what I understand, you can use this extension here.
You will need the package name of the other app.
You may be able to use an ActivityStarter,
There is an example of a technique you might be able to use in Using the Activity Starter
The call of rear camera car from my application woks fine when rear lights are switch on.
But my application doesn't display again when rear lights are switch off.
I get data from serial link from Arduino.
How to data when my application is in background ?
@Christophe_Armand christophe perhaps this link will help: background extension
@Wes_Savage, the link you provided has paid or incompleted extensions. This is a free one.
@Gordon_Lu nice! I dint read deep into it Gordon .. apologies for that. I just figured it was a good place to start. Thank you much for this lead / extension
@Gordon_Lu the extension seems very cool but I don't understand how to use it for my project.
Which block using to activate the application when rear lights are switching off ?
The signal is recovered with a serial link.
Thanks for your help
I found a similar example for the paid version of a similar extension. Maybe you can take a look at it.
The extension you've been pointed to should be used to run tasks in the background. You'll have to use Arduino (a camera/LDR, I suppose) in conjunction with App Inventor to watch over the car lights.
I use Arduino to get the signal of rear lights and I use a wifi camera. I develop my own AppInventor application for a lot of features.
When the signal is switching ON I want to display the camera application at the top.
When the signal is switching OFF I want to display my application at the top.
I think you'll have to use a Bluetooth module (such as HC-05). Juan Antonio has a very good tutorial on integrating HC-05 with your app:
I choose to connect with serial and not BT because I use BT for media.
Can you help me please to set up the task ?
I get the signal of rear light from serial connection and with a clock.
If the value equals 1 (switch on lights) I launch the application for camera com.zeng.wifiavhd else I want to put my application at the top on the page "consos".
Thanks for your help.