The following page
https://developer.dji.com/onboard-sdk/documentation/Protocol-Documents/main.html
indicates that the Open Protocol and Data Transparent Transmission are not available for the M210 and M600. Is this true? Are there alternatives for these drones?
I would need these features to send custom data and commands between the Mobile SDK and the Onboard SDK.
Best regards,
Bart
I cant speak for the Open Protocol or the M210 but the M600 uses a DJI A3 flight controller which I currently have installed on a custom quadcopter. And I can successfully send commands using the data transmission protocol between the mobile SDK and the Onboard ROS SDK.
An alternative would be to buy the N3/A3 flight controller and just build your own custom drone.
Related
I would like to create a windows app that sends a URL or a small file via NFC (preferably) From windows to android and from windows to ios. Has anyone any info or code examples in C# (or other language) in windows that demonstrates how to do this.
Any help would be greatly appreciated.
I did look at something related, I investigated Sending small files from Android to Android via NFC but decided against it.
This is because in Android as of Android 10 that "Android Beam" has been deprecated this means that Android's ability to receive files has been removed. From experience on early version of Android I can see why they removed it as it was too reliable.
Update:
Additional info Android did use LLCP sockets to do peer to peer NFC transfer. the source code for how Android did one end of this is available at https://android.googlesource.com/platform/packages/apps/Nfc/+/refs/heads/master/src/com/android/nfc/ndefpush/NdefPushServer.java
I'm not sure if there was anything similar in iOS.
This leaves you the option of writing code on Windows that does Host Card Emulation(HCE) to emulate a card that carries a Standard NDEF message which can contain things like URL's or data of certain mime types.
Update:
I can say for Android that if the NDEF message contains a URL in the right form that the OS will Launch a Browser to load that URL automatically (If you have multiple Web browsers install it might ask the user which Web browser to use to do this). For iOS I don't know but expect the same behaviur
While I believe that HCE is possible to emulate an card with NDEF message on it I've not seen any code to do it.
In the context of a research project I'm planning to develop a desktop application to operate with my DJI Mavic Pro 2 (or similar drones).
So, my question is: Is there anyway I can control the DJI drone from a desktop application without using the controller? For example, I would like to get the video stream in realtime on desktop app as well as automatically planning the mission for the drone.
Unfortunately, the Windows SDK only provides few APIs compared to the Mobile SDK.
For most of the other heavy/potential killing drones, e.g mavic 2 pro or above. it need remote on so that you can fly.
If you really need to do so, How about tello? it is a small DJI drone that can allows you to control it. Moreover, it allows you to get video and imu feed from its API. There is plenty of open-source code for it.
The controller is required.
Some of the older drones had a wifi option but the newer ones user controllers at the connection.
I am trying to develop basic applications on my moto 360 (synchronizing messages and notifications, sending sensors data..) connected with a mobile phone. My problem is that I wish not to install android wear application on the mobile phone and I would like to know if there is a way not to do so.
Thank you for your help !
It's probably possible, but it's actively discouraged. From the Wear communication API docs:
Warning: Because these APIs are designed for communication between handhelds and wearables, these are the only APIs you should use to set up communication between these devices. For instance, don't try to open low-level sockets to create a communication channel.
Given that a Wear device runs (nearly) full Android, I expect it's possible to roll your own communications layer using low-level Bluetooth, Wifi, or some such. But the correct answer is "Don't".
I will try to be as specific as possible here :
You mentioned that you don't want to install the Android Wear application on you mobile. If this is the case, then your watch still needs to be paired with some phone if its running AW < 2 [which Moto 360 is, for now]. Without this, you will not be able to get the watch out of factory mode (unless you flash it with an already paired watch' data). Even then, it will not communicate with the phone since it's not paired with it.
If instead, your question was about opening up a low-level bluetooth socket with a mobile phone, or any bluetooth enabled device in general (atleast those that implement RFCOMM functionality), then yes, this is still possible, as long as you can sideload apps to your watch. In order to do this, you have to implement a BluetoothServerSocket or a BluetoothSocket, depending if you want your watch to be a client or a server. In either case, you can open a two-way communication socket, with throughput upto 50KBps, in real world scenarios.
I already have an home automation ios app. I can able to control devices that are configured in my home. I can able to access my device via local and remote network.
I just read apple's new ios8 HomeKit support. I want to integrate HomeKit compatibility into my app.I heard HAP(Home Accessory protocol) supported devices can only able to communicate with HomeKit Framework. Also apple said there is a bridge for third party devices to communicate with HomeKit. There is not much information about hardware protocols or procedures, how to use bridge between third party device and HomeKit ?
Is my HomeKit bridge is a real hardware?
Also i have doubts on communicating with configured accessories. Because apple HomeKit Framework have commands like "startExecutingActionSet" to perform one or multiple task , but how this commands works with our Existing commands protocols defined in ios app.
I am new to hardware engineering . So please give me a simple example of communication between apple's homekit via bridge with my Hardware device.
Thanks in advance...
A HomeKit bridge is a piece of hardware that receives HK style commands from an iDevice and translated them into the specific protocol for the target devices in your home. Phillips Hue have one of these. Apple have a protocol that the hardware manufacturers need to conform to and you need to be signed up to their MFi program to get that protocol. However someone seems to have reverse engineered the specs and you can use their code to write your own software bridge. That's what I'm doing.
In HomeKit you do not talk directly to the devices. That's pretty much the main point of HomeKit. So that each developer doesn't need to know each device's specific protocol you just trigger iOS to do the talking for a predefined action. I believe you can also add triggers and action sets by building up a group of actions that you want to happen and firing of the event. E.g. Turn off all accessories in the garage when I go inside. You don't need to know how to turn off each one, you just tell iOS to run the Off command on each device and it knows the rest. Or at least it does for the ones that have signed up to the MFi program and can listen to HomeKit commands.
Can I use Serial Port Profile (SPP) to communicate with iOS devices over Bluetooth Low Energy (v4.0) without the need for MFi Chip?
If you're designing something from scratch (rather than trying to interface to an existing SPP-enabled device), there is a possible solution.
Laird Technologies make a Bluetooth Low Energy Module (BL600), which can be loaded with a virtual serial port application. This creates a service which is similar to the SPP; at the remote end it can just be treated as a plain serial port (albeit rather low speed). You could roll your own service to do something similar on other devices.
It's not the most elegant solution, but seems to work okay, and far easier than trying to get MFi certification.
If you cannot control the peripheral's protocol choice:
The Serial Port Profile (SPP) is still supported by Bluetooth 4.0. However, Bluetooth 4.0 Low Energy uses different pysical and link layer protocols that are not backwards compatible with older Bluetooth standards. Current iOS and Android devices use "dual mode" interfaces that support the backward compatible part of BT 4.0 and the Low Energy standard.
Bluetooth 4.0 Low Energy does not support SPP whereas regular Bluetooth 4.0 does!
I found a Cordova/Phonegap Plugin on GitHub that might serve as a source of inspiration for you. They advertise to support SPP on iOS and Android alike.
If you are in control of the peripheral, i.e. you implement the peripheral's software:
Bluetooth 4.0 Low Energy communication makes use of the Generic ATTribute Protocol. Based on GATT there exist a number of profiles but no serial port profile.
The good news is that implementing your own proprietary serial port profile on iOS, Android and your device is fairly simple. The API instructions for your BTLE module/SoC should provide some examples for existing profiles.
As soon as you see how simple implementing your own profile is, you will probably choose to go for a more use case specific profile which will save you lots of power on your (battery powered?) peripheral.
Just to clear up John Parsons comment from Feb 16th - the BL600 is definitely not discontinued whatsoever.
vSP works well for a low level, low throughput data connectivity using BLE for iOS devices, as well as Android. Video showing the solution working to an iPad are at this link and full source code is available for the iOS application as well http://www.lairdtech.com/Support-Center/Technical-Library/Videos/VSP-Bridge-Command/#.UwYvzGJ_s1w
There are no MFi requirements for BLE connectivity on iOS.
MFi is only relevant to Classic Bluetooth data connections to / from iOS devices, where you need to use Apple's iAP protocol, be a MFi licensee, use an external Apple Authentication IC and pay a royalty to Apple.
NO,you can't. BLE not support SPP.
No, you can't. In general, it's important to remember that any Bluetooth Classic profile isn't necessarily applicable for Bluetooth Low Energy. With BLE however, you can easily create your own custom service/profile, specially tailored towards your particular application. As far as I know, all BLE communication with iOS is currently allowed without participating in the MFi. You can also take a look at this page for further information on SPP and BLE.
I'm searching for SPP for iOS myself and found a German supplier, lintech.de, that has products for "Bluetooth meets Apple" claiming to support/emulate SSP, apparently using their own embedded software layer combined with iAP. "BlueMFI software communicate with APPLE devices using the iAP (iPod Accessory Protocol) and manage the data communication with the Apple authentication chip...BlueMFI software is designed to run on a variety of hardware platforms (Bluetooth modules), and interested users can obtain the relevant evaluation kits. LinTech’s Bluetooth modules with BlueMFI software not only support the APPLE iAP protocol via Bluetooth, but they are also able to communicate with standard Bluetooth devices." Haven't tried this yet, just exploring and sharing.
I won't say SPP is directly supported under iOS 7, Apple says no. Won't argue :)
But...
I use connectblue modules OBS421 and OBS425 on a data collection project.
BLE modules have SPP profile enabled and I transmit data from my sensors to the iOS devices using BTLE module in SPP mode.
Works pretty fine under iOS 6 and 7
That said, I was having trouble with MFi bluetooth devices under iPhone 5S, that's why I moved to BTLE.
Drawback with BTLE, it's limited to 20 bytes at a time.
I had to adjust hardware and software, but was easy.
You have programmable chips such as Bluegiga BL112 that are doing the job. It is the cable replacement code.
I'm integrating it actually for both iOS and Android 4.3. It works at least on the demo board.