Recently someone told me about Solana. I went throgh their website https://solana.com/. I just wanted to know whether substrate pallet is compatible with solana. If yes, how?
Different bridges are currently being built like Wormhole, but most efforts are concentrated on SOL <> ETH at the moment. For a good reason, as most liquidity is on Ethereum.
Polkadot support is in the plans though, as per a discussion I had yesterday with a core Wormhole developer.
Related
I'm an Android developer.
From Android 11, the GnssAntennaInfo class that can utilize dual-frequency GNSS has been added, and it has been confirmed that developers can use it.
If so, is GnssAntennaInfo already used in getLastLocation method of locationManager provided by google location api??
Or is it still necessary for developers to utilize GnssAntennaInfo provided to improve location accuracy??
Sorry I can't give a definitive answer but, since there hasn't been any other response yet I'll answer what I'm pretty sure is the correct answer.
No.
From: https://www.androidpolice.com/2020/03/19/pixel-4-dual-band-gps/
In the sheer infinite expanse of the Android 11 developer documentation, an entry for GNSS or dual-band GPS support has surfaced. While the Pixel 4 isn't explicitly mentioned, it's plausible that owners will be able to use the hardware once developers add support for the new GnssAntennaInfo class to their apps. Hopefully, Google Maps will be among the first to utilize it — even if the difference isn't too meaningful, it might make GPS more reliable.
This matches my own experience. I recently purchased an S20 hoping for this exact feature (~ 1 yard accuracy), currently I'm seeing ~ 4 yrds. I've confirmed I see L5 satellites and my phone just got the Android 11 update tonight. All of my GPS apps show NO improvement in accuracy. I'm unsure of Google Maps, don't really know how to tell with it. However, if some "provided" function like getLastLocation were benefitting from high accuracy I think I'd see it in my GPS apps.
Hence, if I can figure out exactly how L5 can improve accuracy, I' going to attempt to write this myself. I'm having a hard time tracking that info down though...
We have an existing cross-platform Mobile Application, that also has an accompanying web application, that uses AWS as a back end (RDS for Database, Four server instances, and a Load Balancer to distribute traffic). APK and IPA files are packaged and sent to the stores, while components are retrieved from our server per request, which enables us to reduce the number of store builds, and make the process easier for getting changes out to clients.
We are at the stage of Development that we need to move to another platform to better facilitate our fast growing client base.
Due to the conditions upon our clients, these things must be considered.
must be cross platform (Android / iOS).
must be offline based (users need to be able to access without an internet connection)
must be able to sync with an existing database when there is a connection
requires Authentication
Cloud based (? may not be the right term, but meaning the ability for us to store components on a server and have a device check for updates and download a local copy - enabling us to work and distribute fixes faster)
Ideally compatible with AWS
We are currently looking at Xamarin to facilitate us for this move, however there is a lot of documentation and plugins out there to do all sorts of different things.
As developers, we all have some .net / c# experience, however none particularly with Xamarin.
We have a particular timeline that we need to adhere to (and need to ramp up in the next couple of weeks), and right now are essentially stuck in Limbo in a research phase, as we can't afford to get some things right. We are unable to move forward until we know Xamarin (or some other framework) is able to do everything that we need it to do.
It's hard to escape from the 'code it all ourselves' mentality - especially as we don't know where to start looking in terms of third party packages for Xamarin, and their documentation itself.
A lot of documentation mentions various systems of Azure - we would not be against moving to Azure over AWS if it _had to be done*, but because of the existing infrastructure with AWS - staying with AWS is obviously the preferred option (users need to access the current system whilst we build the new system)
This stack overflow post is to ask for recommendations, comments, or other observations on anything and everything involved with the process in regards to choosing frameworks, design patterns, methodologies, third party packages, etc.
Obviously we would like to use best practises for everything moving forward for optimum scalability and cleaner, more robust code. It's just hard to know where to start!
Any input will be highly appreciated.
Cheers!
edit: I am aware that this is 'asking for recommendations' which is 'specifically off-topic'. I have read the posting guidelines about open ended discussion, and am quite confident that this case is different. There is an underlying problem here, in that we are seeking advice on combinations of frameworks and plugins that are fully compatible with all of the items in the list (above)
Let's try to breakdown each of your requirement and constraint mentioned in the question.
1. You need a offline first architecture (With Sync mechanism)
Xamarin + Azure would make a good comdo for you, as it would support offline storage out of box (With a simple PullAsync call).
Albeit there are AWS SDK available for Xamarin. Here it goes http://docs.aws.amazon.com/mobile/sdkforxamarin/developerguide/setup.html
So the call is yours. There are few other ways to achieve caching offline storage in Xamarin, you can build upon those strategy in your logic. Alternatively there is a very interesting C# library Akavache for caching and offline storage.
2. OAuth 2.0 Authentication
Xamarin has a very good library named Xamarin.Auth. Though I would not say it is very easily extendible at this but there has been some serious work going on from Xamarin on this library.
But I would say it is very easy to use. The apps I have developed so far that includes - Google OAuth, Facebook integration, Microsoft account integration. It worked fine for all of them.
3. Cloud based distribution
There are nice tools available with Microsoft. Which makes the distribution easy. Have a look at https://mobile.azure.com . Also hockeyApp is good for distribution I found.
Where to start:
A very good starting point for you would be https://channel9.msdn.com . Just go there search with keyword "Xamarin" and view some videos. May be all these cross platform dynamics will be much easier for you.
Overall I found Xamarin a cool product to work with. Because anything that can be done in native Objective C/Swift or Java can very well be done in Xamarin using C#.
Maybe I have't looked hard enough, but I spent yesterday googling for a bit and found no relevant projects on hacking the DJI Phantom Drone in order to create new coordinating apps. This is besides the app for coordination DJI currently uses for their drone. I'm trying to see if there's a way to communicate with the Drone with a specific protocol in order to accept a set of procedures.
Any help would be awesome,
Thanks.
Great News for you and all us Droneys! DJI has launched their SDK since you asked this question. They released it last November and you can now apply for a license and write your own apps for the Phantom2 Vision+ using their SDK.
Check it out at https://developer.dji.com/
I am already building a project using the SDK - you can follow my progress on my blog / product site. I will also try to update it with good DJI related development links and tips.
This post is old but I think it is good to leave a foot print for others :)
There is this new company called NVdrones, which created a peace of hardware that you can attach to any drone (you need physical access to the flight controller), and once you do that you can use their SDK (Arduino, Java, Android and Javascript) to write your app without the need of hacking, soldering or anything else. It is just plug and play.
Another benefit is that you are not locked with a specific drone (DJI SDK or 3DRobotics SDK), you can use the board on anything you want. Which gives lots of flexibility.
The developer site is http://developers.NVdrones.com
Hope this helps.
This is a great topic!
You could check how to hack your copter here: https://github.com/flyver/Flyver-SDK/wiki/-2.2--How-To:-Flyver-Hack-a-Copter
By opening the drone, taking out the original controller, soldering a few wires and sticking an Android phone to it, you will have the ability to program your Phantom in a modern manner with an open source SDK and application based development. This means that you could add computer vision to it, automation or additional hardware. You could also use smartphones, web and other interactive devices for remote controlling the copter instead of using the standard remote controls.
The Phantom, however, is offcenter balanced due to the fact that most people use gimbal with it. Without the gimbal is a lot less stable from my experiments so you will have to put some extra work in center balancing it.
Newb here learning rails... any advice/comparison of community engine v. social stream? I'll be writing a dating site, so especially if either lends themselves to that development I'd appreciate the advice.
I have tried CommunityEngine in the old days. Currently to use it with rails3, you will have to use a specific branch mainly updated by the community to make it stable. i'm not sure if that rails3 branch is production ready yet.
I don't know community engine, but have been looking at social stream and it looks very well put together.
We upgraded social stream to a mobile platform by exposing api end points - it took a couple of months. We built separate controllers for each call rather than modifying the core classes. The platform is now flexible enough to cater for any use case and we can hook in to updates on the trunk. It's really well thought architecture and has had iterations of refactoring. (I think the webviews / javascript is a bit of a mess though)
I suggest you have a look at this - it took my tech lead a couple of weeks to be comfortable with this.
https://github.com/ging/social_stream/wiki/Social-Stream-Base-database-schema
WRT communityengine - I abandoned this over 4 years ago.
https://github.com/jdp-global/communityengine/commit/31f9b267706157a63bfc103a290bd6e3d874066a
Any platform you choose needs to have a focus on APIs / web services.
I have an idea that involves social networking (note: it's not just a regular social networking site), and I'm wondering if I should use a social networking platform such as SocialEngine, Elgg, or some other, or get a developer and create a custom-build solution to meet my needs?
Make a list of your requirements and if an existing platform meets your needs (even if it needs some tailoring) then go for it. It'll get you started quickly and allow you to focus on building the online community. You can always switch over to a custom solution if the site takes off as you'll then have the money to pay for its development. Good luck in any case!