4 letter password to be checked and confirm

MIT App Inventor Help
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1

i am new to android programming and learning from this tool. i HAVE A Four letter password .
For now, the user has to type that 4 letters and step in. when it is right it says access granted. Else it has to say sorry.

I wrote in the online tool several times with chat gpt help but everytime some errors unknown to me. when i type, the UI is still nothing happens, can you help me please. thanks.
password chk and confirm android blocks_20sep25

2

Please show your relevant blocks

3

Your if then else blocks must be in an event to be executed, for example in a button click event...
Fix your yellow and red errors!

Taifun

4

thank you very much. But, being a new person, i am not clear what you meant by red and yellow errors. i will try now.

5

I SHARED A Picture above. may i know what you exactly meant more than it pl. thank you.

6

How many of the AI2 tutorials have you done?

ChatGPT is so wrong that we don't bother trying to correct its garbage.

We are here to teach people, not robots.

7

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8

not sure what u mean by AI2 . So, it means i did not do anything conscious.
--"We are here to teach people"
Thank you. can you pl. help me.

9

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i am now able to see the text box allowing me to type the letters but still, i have some doubt on this, when i use the keys, after typing 4 letters and pressing the " DONE" Button, the labels does not appear. but only when press to start button, it happens. how to resolve this . can you help me

10

You have to move these blocks into the DONE Click event

Screenshot_20250922_051838_DuckDuckGo
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A very good way to learn App Inventor is to read the free Inventor's Manual here in the AI2 free online eBook App Inventor 2 Book: Create Your Own Android Apps ... the links are at the bottom of the Web page. The book 'teaches' users how to program with AI2 blocks.
There is a free programming course here Course In A Box and the aia files for the projects in the book are here: App Inventor 2 Book: Create Your Own Android Apps
How to do a lot of basic things with App Inventor are described here: How do you...? .

Also do the tutorials Our Tutorials! to learn the basics of App Inventor, then try something and follow the Top 5 Tips: How to learn App Inventor

Taifun

Trying to push the limits! Snippets, Tutorials and Extensions from Pura Vida Apps by icon24 Taifun.

11

Thank you. i will consider your inputs. Meanwhile, i started moving to my next portion of work, where in i have to connect to a diff. IP Address. I get 1101 error. could you guide me pl.

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12

Your blocks show another url compared to the error message?

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please elaborate what exactly yoj are trying to do and why. What should be returned?

Taifun

13

sir, actually, either of the IP when i use it picked an error. Since, i had an earlier screen shot I added here. so, thanks, i must have explained before putting it here. but, sorry.
please elaborate what exactly yoj are trying to do and why. What should be returned?

I am at the initial stage of learning IOT APPLICATION to trigger a remote switch using an Android App and hence crawling on my baby steps to get it done.
MITAPP, helps me since me not a coding person.

While doing so, to make things easier for me, i have 2 Sim Card used in my mobile. So, I picked one of the sim card and using its dynamic IP Address to activate the SIM Card.
The mobile on which my MIT App is running has a VODAFONE as service provider. The SIM Card that i want reach out is connected to a diff. service provider.
When i use the App, to reach the IP Address i get the error 1101>

Then i referred to CHAT GPT, it indicated that both the app and remote IP ADDRESS Must have same network or be connected by HOT SPOT . But, despite setting up that way, still i get error message.
i also have ESP32 Board, that i want trigger with a WIFI Signal from my second mobile phone whose IP i am triggering. But, it is showing up ERROR . Hope i explained . pl. help me

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14

I do not think this will work... I might be wrong...

Try a search in the community
https://community.appinventor.mit.edu/search?q=Esp32%20wifi

Taifun

15

oooh, does that mean what is the IP ADDRESS being used to communicate through the MIT APPs then. can you pl. give me some inputs

16

How can I activate a sim card programmatically in an Android device?

Answer from Gemini below
Taifun

Directly activating a SIM card programmatically on an Android device isn't possible for third-party apps due to security restrictions. The process of SIM card activation, which involves provisioning the card with network settings and a subscription profile, is a highly controlled process managed by the mobile network operator and the Android OS.
eSIM Activation and Provisioning
For eSIM (embedded SIM), the Android platform provides specific APIs for carriers to manage subscription profiles. This is part of the Remote SIM Provisioning (RSP) process. A Local Profile Assistant (LPA), which is a system-level application, handles the communication between the device's eUICC (the hardware chip) and the mobile network's Subscription Manager (SM).

  • EuiccManager: This API, available since Android 9 (API level 28), allows a carrier's app to interact with the eUICC.
  • Activation Code: An app can use a provided activation code (often from a QR code) to initiate the download of a subscription profile from the network. The EuiccManager.downloadSubscription() method is used for this.
    These eSIM APIs are intended for use by mobile carriers or their partners, not for general third-party applications. Attempting to use them without the necessary carrier privileges will result in a security exception.
    Physical SIM Card Activation
    For traditional, physical SIM cards, there are no public Android APIs for programmatic activation. The activation process is tied to the carrier's network and typically happens when the user inserts the card and the device connects to the network for the first time. The carrier's provisioning servers handle the activation "over the air" (OTA) by configuring the SIM card and device.
    Third-party apps are limited to reading the state of the SIM card, not modifying it. The TelephonyManager and SubscriptionManager classes in the Android SDK provide information like the SIM state (e.g., SIM_STATE_READY, SIM_STATE_NETWORK_LOCKED), carrier information, and subscription details. These APIs require the READ_PHONE_STATE permission.