am developing an application where I can get data from ELM327 and display it on an android device.But I have a doubt,the ELM327 is not controllable,I mean it cant keep sending data automatically to the android device,so how would I be able to pull data from the ELM327.I am really stuck here.So help would be appreciated.Thank you!
Can anyone help me with the type of commands I have to use in android to get responses from ELM 327?How would I only receive speed and rpm?How can I read that data and display it on the android device?
The ELM device is a command/response device which requires you to send a command in order for the ELM to process it, communicate with the ECU system, then format and deliver the response back to you. You won't get unsolicited messages (responses) from an ELM327 chip except on power up when the signature is sent, or unless you set the device into a monitor mode.
The ELM327 is that you use Bluetooth.
I'm trying to make an application to read data adnroid ELM 327, you could.
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I am a newbie to Android app coding and I am currently writing an Android app to scan BLE beacons nearby and get the data inside the beacon. Currently I am using LightBlue Explorer which is an iOS app as a BLE beacon for broadcasting data.
I want my app to receive data broadcasted by the beacon. First of all, should I use 'descriptor' as a place for putting the data? (Since I can set the characteristic user description and descriptor value inside LightBlue Explorer) If so, how can I get the value of a descriptor in my app? For now, I can get the service and the characteristics of that beacon. Thanks a lot!
I am not familiar with beacons, but i have worked on BLE devices. SO i might say you a thing or two to start conversation thread.
BLE devices around you gives out broadcast information regarding the device itself necessary for establishing the connection with device itself.
So you cant directly access the data within the device without prior connection.
This is called Generic Access Profile (GAP)
Once after establishing the connection with the device and the app(Mobile) you have to use Generic Attribute Profile (GATT) to get data necessary for the device.
You can receive data after connection by two ways.
1) Write & Notify
2) Write & Read
1) In this you have to write necessary command on the specified write characteristic for specific service on the device and device will push the necessary data on the specific Notify characteristic. Make sure the notify characteristic is enabled
2) In this you have to write necessary command on the specified write characteristic for specific service on the device and then you have to request read to the device from the app, then from the read port you can get the data given by the device.
I hope you get kinda of idea about BLE working. I have worked on BLE devices on Android side.
If any doubts just reply to thread.
To others if any correction you feel is needed, please reply.
Thank You.
I'm at a loss with this, so any help would be greatly appreciated.
I've developed an Android application that's very simple: you push a <Button> on the device layout and it counts and updates the UI. This is all working fine.
What I need this app to do is send a signal down the USB cable that's connected to an Arduino.
I understand the Arduino would need to listen for some data being passed across or something.
I don't even know where to start.
I am an android developer and new to the bluetooth low energy technology here i am creating an application which is receiving some data packets from a BLE Device (it is like a embedded programmed microcontroller).I am able to connect with the device and then i have to send a command to read the data or the characteristic.I don't know ho can i proceed for the further steps to do that.I have the UUID's and those commands but not able to programme it in android.
Please help me guys.
Thanks
Best Regards
Utkarsh
you should read out official tutorial where you can eaislly find how to get data this is link http://developer.android.com/intl/es/guide/topics/connectivity/bluetooth-le.html
I want to send data (for an example it contains the information: name,address) from my app to another hotspot enabled android device using the same app and display the information in it. So, how do I transfer? If it is not possible please tell me if there any possible way to transfer data via WiFi. Since I am new, procedure with code help me a lot.
This is what you need. P2P communication can only by performed by devices that run android 4.0 and up.
I have a bluetooth device that collects some environmental data like temperature. I want to build an Android app that will pull the data from this device and display it. The problem here is the device is a kind of non-pairable. It simply works by writing commands on RFCOMM stream.
I just wanted to know if it is possible to create an RFCOMM connection stream without pairing the device in Android? I have tried to look at the other SO posts and blogs but didn't found any useful information.
Any help or pointing in right direction is appreciated.
Thanks