Skip to main content

Deals You Can't Miss

1 Year Subscription

Dev Setup of Expo for React Native Development

When you do React Native development using Expo framework there are three ways you can see your development works on your Android device or emulators, depending on how you connect to the Expo development server. 

Note : The one commonality is that you use an Expo-Client on your Android/ios device/emulator to talk to the development server.

Note : The pictures below consider WSL2 on Windows 10 as development environment where Expo server is running. This is purely for representational purpose, and the concepts apply irrespective of your dev env where Expo server is running.

1. Connect using Localhost


  • There is no iOS simulator on Windows. That said, if your dev env is Mac, you could have Expo server running along side ios and Android emulators on the same machine.
  • When you have both the server and the client running on the same host, the best approach to connect them is through localhost.


2. Connect using LAN

  • If you hate emulators/simulators like I do and wish to use the device for development purpose as well, you could well connect the server and the mobile device when they are on the same network. For this make sure you connect your mobile device Wi-Fi to the same network that your laptop is connected to. The is ideal and super fast.
  • When using WSL 2 on Windows, though, I wasn't able to get this set-up working (see my other post on this subject). If you are like me stuck in this, the next option that is available is to make use of Tunneling option.

3. Connect using Tunnel

  • Tunneling is the slowest of the options, because you go through the internet to connect two devices that are literally close to each other.
  • When everything else fails, this is still there for your rescue. Here you leverage the Expo's platform to ship development code to client device for testing using the url that it exposes in the dev-server.
  • This option is also cool when you want to showcase your development work in progress to your clients or other stakeholders as you work through something to get their feedback. Call it Agile, if you wish to ;)


My Popular Posts

Ten Commandments of Egoless Programming

We are nothing but the values we carry. All through my life thus far, I tried to influence people around me with the virtues I value. Thanks to some good reading habits I had inculcated, and the fortune of being in good community of peers and mentors alike, I managed to have read some real good books. This post is about the 10 commands of egoless programming in Weinberg's book. I shall explain the commandments based on my experience here. So very many decades ago, Gerald M. Weinberg authored  The Psychology of Computer Programming . In it, he listed The Ten Commandments of  Egoless Programming , which remains relevant even today for us as not just programmers but as team-members. Weinberg is regarded as a pioneer in taking a people-centric approach to computing, and his work endures as a good guide to intelligence, skill, teamwork, and problem-solving power of a developer. When they appear to inspire and instruct, we find that they can apply to just about every business area, and e

Should I buy refurbished laptop from Amazon?

This post is based on my experience with amazon.in and guess it to be true on all other platforms as well. At least you can check out and verify for these pointers before you make that decision to buy renewed/refurbished laptop on Amazon with your hard earned money. I see this question propping up in several forums and on many different occasions. In the recent past, I had my 5 year old dell laptop that gave up because its motherboard failed. One of the options that I had in my mind was to re-use the HDD and the 16GB DDR4 RAM of that old laptop in the one that I purchase next as secondary.  I had come to a conclusion that it is not worth buying a refurbished/renewed laptop at all. Why? For the following reasons, most of which I see as BIG #RedFlags: You got to remember that Amazon provides a platform for 3rd party sellers to sell their products as well. So in your search for refurbished laptops you wouldn’t want to choose some random 3rd party seller who Amazon doesn’t endorse. You cou

Multi-tenant Architectures

  Multi-tenancy Application Deployment Architecture could be modeled in 4 broad ways: Separate Apps & Separate Databases Shared Apps & Shared Databases Separate Apps & Shared Databases Shared Apps & Separate Databases There is no right or wrong here. It's about choice and consequence that you should consider taking into your business context and constraints. In this post I intend to jot down a some key points to keep in mind for each of these multi-tenant architecture. These are more of quick notes for my quick reference, a cheat-sheet of sorts when I have to make choices. And I guess this can come handy to you too in your wise decision making. Separate Apps & Separate Databases Easiest to implement from development and deployment stand-point. Just automate the deployment infrastructure for every tenant for quick set-up. Most expensive of all the models from infrastructure cost stand-point. Relatively longer deployment t