First off I would like to ask if it is possibe to send a stream of data from an arduino with HM11 to an android phone via bluetooth.
The data contains ultrasonic sensor's readings, orientation, battery level, etc.
My android phone will be displaying those data accordingly acting as a monitor.
I tried coding already using the android studio using the bluetooth guide resources but i end up unable to connect to my module with a message "read failed, closed or timeout -1". I have tried connecting while paired or unpaired. My app can discover HM11 as well as receive the data using HMBLE Terminal app i have downloaded from Play Store. So I guess the android studio guides are not meant from android to bluetooth modules.
I would also like to begin from scratch as i may have missed out some very important basic information.
Any help?
Related
I'm developing Flutter app for Android, where I want to exchange some data between few instances of my app on different devices via Bluetooth. I'm using flutter_bluetooth_serial package (this is the only package I found which supports Bluetooth Classic, not Bluetooth Low Energy). I'm able to make connection
between device 1 and device 2 using BluetoothConnection.toAddress(device.address); (but even there was a problem, I had to modify the plugin and apply this workaround to make connection work).
Now I want to run my app on device 2 (which is connected with device 1) and send or receive some data, but I have no idea how I can do that using flutter_bluetooth_serial. In device 1 where I create connection I can use result of BluetoothConnection.toAddress(device.address) to send or listen for some data, but on device 2 I can't use it, because connection is already established by device 1 and I can't see another API for communication.
To simplify: let's say I want to achieve something more or less like Bluetooth chat functionality in this example application, but between multiple Flutter applications, not Flutter app and raspberry pi.
Is there any way of solving it with use of flutter_bluetooth_serial or any other package? Or I have to write some native Android code?
I am trying to build an android app that can be controlled by a laptop with ubuntu installed via Bluetooth. What I want is to develop an android app that listens for incoming messages and performs particular actions according to the message. Basically I want the app to listen for Bluetooth signal (message) in the background while camera intent is open in the foreground and snap the picture when a particular message is received.
For that, I started learning about the Bluetooth serial communication and got to know about the following library on Github:
https://github.com/harry1453/android-bluetooth-serial/tree/master/demoApplication
I have replicated the demo application and the application is sending messages successfully, however when I send the message from Linux to the Android app it is not working. Can anyone help me regarding this issue or can suggest me some good tutorial to follow in order to build the app that can communicate with raspberry pi serially?
We know Bluetooth serial configuration is poorly documented (I read many questions here without any clear results.)
I believe it's due to the Raspberry Pi Bluetooth configuration issue based on your description.
With correct Raspberry Bluetooth serial configuration, your program with serial routines (written in Python using PySerial or serial routines written in C, which you can find it in github), your requirements (sending info about camera status via serial port will work.
Please see Bluetooth Serial Configuration (see latest answer) for more details.
I am trying to develop a companion app for a project of mine.
I want this app to relay incoming notifications on my phone to a device connected via BLE. This device will then display the text data on a screen, similar to a heads up display so that I can use it in my car and not have to go through my phone while driving (also illegal of course).
I want to know what is required for my app to be able to get notifications, and send it via BLE to the already connected device. I'd also really like to know if this can be done for an iOS app since I would prefer to end up with the final app being built for iOS. If not, android is fine for now.
This device is an ESP32 and will run its own code to execute actions when text is received.
Thank you
Target:
Sending a file to connected peers. The connected peers should recieve the File without a preinstalled app.
Situation - Question:
I'm writing an app that opens WiFi-direct or a WiFi-Hotspot for other devices. The other devices connect to the device (Main-Device) where the App is installed on. Now the Main-Device should broadcast a file and every device connected to the Main-Device should get a notification, that it could receive a file. But, the other devices should not need an App to receive the file!
Is this possible? Cause all I found till now describes how you can send something from one to an other device if both installed the same app. Using sockets and one device becomes server and the other client.
Reason:
I try to create a game, which just is installed on a Main-Device. Other devices can join the game by connecting over WiFi, then they'll receive a HTML5-file from the Main-Device which they can open in their browser. As soon as they have the HTML5-file they'll be able to interact with the game on the Main-Device.
But I don't want to force everybody who likes to join the game to download the app. Another Point is, if this is possible, I don't need to rewrite the app for other systems. Cause every Smartphone/Tablet has a Browser.
But, the other devices should not need an App to receive the file! Is this possible?
No, it isn't.
I try to create a game, which just is installed on a Main-Device. Other devices can join the game by connecting over WiFi
That, is possible. What you need to do is build a captive portal.
Basically, all DNS names resolve to your server's IP address, and all traffic that would be routed elsewhere is not routed to the internet. How you do this depends on your network setup. There is a lot of software available. I've used Untangle before with decent results: https://www.untangle.com/store/captive-portal.html
The scenario:
I have a android app running my in cellphone. I´m the owner of this app.
I have a google-glass synced with this cellphone. I´m developing a my app for google-glass using the new GDK launch a few weeks ago.
I want to send a data from glass to cellphone and then receive a answer.
No internet connection is necessary, so i´m planning to use Bluetooth to this data communication.
I can create a Bluetooth socket connection, however this will obligate me to manage it.
There is no android high level abstraction that permit me to call a service or a activity directly on the cellphone?
AFAIK, there's no direct pipe between them, the glass is basically a phone with a different set of inputs and outputs. You can create and manage the connection, and it's yours.
AFAIK, there is no other way to do this, as Travis said there's no direct pipeline between them, seems to be true. You can use use BLUETOOTH Chat Application included in the Android SDK.
Just change the input method to voice input in the application
Install that Application in both the devices
Try It
change the code accordingly to send files too.