I want to create IBAction for the iPhone or iPad that wirelessly or remotely cause a circuit to complete. So again. I am not sure what API I need to use. I need help to connect the IBAction to the process. Please any help would be appreciated.
The iPhone doesn't contain a specific API for controlling external devices. You need to refer instead to the user manual or data sheet of the device you are attempting to control.
If you use a networked device, such as the make controller or Ethernet shield on an arduino, you can use networking commands to control the circuit.
We can give more specific help if you explain more about what you are controlling, and whether you already have hardware to act as a gateway between the iPhone and the device you are controlling.
Related
I am trying to prototype a solution to a problem and am currently exploring multiple routes I could try. Is it possible for one iOS device, running a certain app, to communicate directly with another iOS device, running the same application - without the need to be on the same LAN?
Solutions I am currently investigating are using Bluetooth and ad-hoc wireless connections.
Ideally, the application when installed would ask the user for the required permissions, and then would accept and/or send data to/from another client after a handshake had happened.
My concern with Bluetooth is that 'pairing' would need to happen with every device, rather than happen in the background once the user has installed the app. I have a feeling what I am talking about isn't possible from what I've been reading elsewhere on Stackoverflow.
Take a look at Bluetooth Low Energy.
https://developer.apple.com/library/ios/#samplecode/BTLE_Transfer/Introduction/Intro.html#//apple_ref/doc/uid/DTS40012927
Here is another example,
https://github.com/KhaosT/CBPeripheralManager-Demo
You might also want to look into GameKit and peer-to-peer connectivity there.
I can't tell you anything about it, but you might try looking at iOS 7. If that's an option, I'd take a look. Can't talk about what it is because of NDA though.
Depending on what you need to communicate, you could try checking out this project, which lets you share arrays of strings between iOS devices over Bluetooth LE.
You don't need to "pair" the devices and it can still communicate while the app is in the background. SimpleShare
Hope it helps!
From the documentation of MultipeerGroupChat:
MultipeerGroupChat sample application utilizes the Multipeer Connectivity framework to enable nearby users to discover, connected, and send data between each other. This sample simulates a simple chat interface where up to 8 devices can connect with each other and send text messages or images to each other. Here you will learn how to bring up framework UI for discovery and connections and also how to monitor session state, listen for incoming data and resources, and send data and resources.
This is an excellent example at developer.apple.com here is the link
https://developer.apple.com/library/ios/samplecode/MultipeerGroupChat/Introduction/Intro.html
Also this tutorial from Ralf Ebert demonstrates how to use Multipeer Connectivity framework for peer communication should help you.
https://www.ralfebert.de/tutorials/ios-swift-multipeer-connectivity/
I am looking to write application for iPhone which will be able to control radio and CD player in car. Radio and player have Bluetooth connection available.
I started this question in order to obtain all informations I need for this one one place. I have few questions, but if you find anything I didn't ask important for me to start developing this application, please, let me know.
I have read about AVRCP profile and Bluetooth device in car supports AVRCP 1.3, which is good enough for me, having in mind controls which can be performed in that protocol version.
I read a lot about people saying "Apple device can only interact with each other", "Apple device can't be connected via Bluetooth to non-Apple device", "MFi program is obligatory if you want to do that", "MFi is not needed", etc. My first question is:
1)Is it even possible to pair iPhone (4, 4S) with radio and CD player in car via Bluetooth and control radio stations and music with any iPhone version? If yes, what are the limitations for making this kind of successful Bluetooth connection?
There is also very few informations about roles in which iPhone can work. For AVRCP there are two kind of roles: controller and target role. By reading this paper: https://developer.apple.com/hardwaredrivers/BluetoothDesignGuidelines.pdf I didn't find answer to my second question:
2) Can iPhone act as a controller and issue all available commands stated in AVRCP 1.3 to target device (radio and CD player)?
I would also like to know about available frameworks for this particular problem. I know there are several of them, but if anyone recognizes the right one for my problem, I'd like to know:
3) Which framework for interacting with target device should I use?
From developer point of view, I am also interested in available APIs for interacting with connected Bluetooth device. Since I am making my own application and assigning actions to buttons, inside of methods assigned to buttons I need to perform message sending to target device. So my next question is:
4) Does anyone know how if there's a way to send commands to target device (start/stop/pause/forward/backward, etc) as part of some API provided in XCode, or each message which I attend to send via Bluetooth to target device I need to make according to protocol documentation (make entire message (header, body, command part, etc) by myself)?
AVRCP was my thought for accomplishing this application. If I am wrong, please let me know.
Bluetooth has different profiles and when message is sent from one device, as far as I understand, profile itself handles message and interprets it and delivers to target device so target device can understand it. I do not understand how a message sent from iPhone to target Bluetooth device is handled from the moment I send it from my Objective-C (or C) code. That's the main doubt I have and it is related with question 4 - do I need to make raw messages in correct format in order to send AVRCP commands to device or I can use some API which will recognize those messages as AVRCP (or any other kind) and deliver it to target device?
This last question (if I suppose there is any kind of positive answer to all previous) concerns me the most from developer point of view. So, if anyone had maybe experience with this specific problem, I would appreciate any kind of answer or advice.
I am really looking forward to your answers. I hope that constructive and useful discussion will start on this topic and that lots of useful informations will be written.
Best regards.
You can do it using CoreBluetooth if your device (CD Player) is Bluetooth 4.0 LE compliant
Most likely you shall not be able to do it even if your car CD player has BLE 4.0.
With Core Bluetooth devices act as "Central" (client) or "Peripheral" (server), the peripheral "has data" and expose services with characteristics (variables). The central (client) reads data from the peripheral or subscribe for notifications.
Your only chance is to connect to the CD player as peripheral (server) and your iPhone being the central (client). In this case the CD player must expose services that allow you to control it. To be honest I do not know how this can be done, since the central (the iPhone) will read data and receive notifications from the peripheral, not vice versa.
Reversing roles, implementing iPhone as peripheral makes sense, but there is no predefined Bluetooth LE service for remote control, so your car CD player does not know what service to expect from you. It might work using HID service (Human Interface Device), used in general for keyboards and mouse, but according to this post the HID is forbidden by Apple on iOS.
I want to control a string of LEDs directly from my iPhone. The LED controller chips talk the i2c serial protocol.
Can I do this with Apple-supported APIs on a non-jailbroken iPhone? Which frameworks do I need to use?
Yes, but you will need an external hardware to do that. iOS does not give you access directly to I2C in the docking connector.
KissBos has a OEM board to do that, with a special firmware. You can connect to their board via WiFi, using a TCP based protocol, or via a RTP-MIDI based protocol (RTP-MIDI is implemented in iOS, you don't have to deal with the protocol details, it's just a MIDI port for your application).
If you want to go through the dock connector, you will need their USB interface (it will transform the USB into RTP-MIDI, which goes in the OEM board)
I'm quite sure that you can't do that. Apple is very strict about what you are allowed to and not. I spent days trying to find a way to get access to the iphone's bluetooth layer and ended up with my head against the wall (only a limited game api is public, else you have to go with the Made For Iphone program). However, you are able to do some stuff using the usb cable, but I guess that the possibilities are limited with that too.
My iPhone connects over adhoc wifi to a wifi sensor module.
The challenge is to code an app that uses this sensor module. But I'm not sure what specific API's to use to best architect this implementation.
I've started looking into the CocoaAsyncSocket class as it seems to be an appropriate tool for such use.
Does the user always have to manually connect to the adhoc wifi device? (through the Settings app) or can my own app handle the searching, making, and breaking of the wifi connection?
I doubt iOS lets me programmatically toggle whether Wifi is on/off.
Once the sensor data is being received, what container would best handle the stream?
For example, on other platforms, I coded a rotating queue buffer.
Thanks for your input.
Edit: The protocol in question is straight CSV formatted ASCII. Not HTTP, FTP, etc. Just raw data. The app is to simply open a port on the connected IP, and read/write.
Your application cannot turn wifi on/off, or select a wifi network.
Without more information on what protocols this wifi sensor module speaks, it will be impossible for anyone to give more than vague recommendations. If the module can serve data over an http connection, that would probably be ideal. If it requires your software to open a connection on a specific port and communicate over something other than http or ftp, your job will be a bit more complicated. CFNetwork and projects derived from it's usage, such as CocoaAsyncSocket which you mentioned. You can see another implementation of an HTTP connection over CFNetwork in ASIHTTPRequest, that may help as a reference for handling download streams, queuing operations, etc.
As for storing the data, again it's hard to give any concrete recommendations without more information. If you want to store the data to the filesystem of the iOS device, NSData will probably meet your needs. If you need/prefer to use a queue for buffering data, there is a simple category on NSArray which provides queue semantics. The link to CHCircularBuffer in that SO article is dead, but this github project appears to have it.
edit: Here is the official version of the CHDataStructures. I don't know if it's an improvement over the previous link, but it appears to be updated for the more recent iOS SDK.
Add the SSID of your wifi ad hoc networks in settings. When you see the SSID of the network, click the arrow and choose connect automatically. After this, the phone will automatically connect whenever it comes in range. After this, the two devices can communicate using regular socket APIs.
I want to use a custom interface to connect with other iDevices in a p2p game. I know I can either use GKSession and GKSessionDelegate or use the lower level Bonjour browsing. But both of them will search for devices both over bluetooth AND wifi.
I want to list only bluetooth devices. I know this was answered in the past as impossible, but the Flight Control app seems to be able to do it.
I thought I would answer to let you know that YOU ARE NOT ALONE, I am trying to do the same thing and it is kicking my butt! This link might help you:
http://www.iphonedevsdk.com/forum/iphone-sdk-development/40710-gamekit-api.html
I am trying to setup a server/client relationship and that requires me to use my own custom interface too.