Can someone please do a tutorial to flash the TI-nspire CX CAS?

I upgraded to OS 4.5.5 before realizing it wasn't supported by Ndless.

So now I want to remove the os protection or flash it to downgrade the os and install Ndless.

I'm willing to buy the USB/TTL interface.

Thank you!

amazing !!   

My new album Hardcore for the 21st is now out at the above URL and at other stores:

https://djomnimaga.bandcamp.com/album/hardcore-for-the-21st
https://push.fm/fl/hardcore21

It only includes hardcore music (some of which will probably be eventually remade into electronic power metal or vice-versa).

An increasing amount of users with the recent OS validation loop problem on the TI-84 Plus CE are visiting this topic but since it was originally about another similar issue I wanted to link to the TI Education page about what to do if you have a revision AA TI-84 Plus CE/CE Python calculator stuck in a boot loop when plugged in.

https://education.ti.com/en/customer-support/knowledge-base/ti-83-84-plus-family/troubleshooting-messages-unexpected-results/40446

A few months ago, Texas Instruments released an older batch of TI-84 Plus CE and CE Python calculators, probably due to failure to rotate their inventory properly at one point in time and by the time those calculators (revision AA from 2022) made it to stores the batteries inside those calcs became completely discharged or dead.

Ported to Game Boy Color: https://tiplanet.org/forum/archives_voir.php?id=729821
https://djomnimaga.itch.io/possum

Well, it's called Telnet but it's pretty much a serial monitor on the calc side like the one that comes with the Arduino IDE, no unix shell needed. It was designed for use with one but you don't really need one.

Do you know any other way to communicate without telnet terminal? Because I don't have access to a unix shell and I don't know how to use it. It also seems like an overkill for my purpose.

Yeah, from what I remember it's not easy for a calc to communicate with an Arduino due to timing issues and the CPU being barely powerful enough for fast serial communications, I'd advise trying with one Arduino first at low speeds with the build-in Serial library (iirc you can plug the TX and RX pins directly on the 2.5mm jack), and on the calc itself use a telnet terminal such as this one: https://www.ticalc.org/archives/files/fileinfo/141/14141.html

I'm currently working on a project where I make two calc ti84+ wirelessly message each other using a 2x Arduino Uno and a 2x nrf24l01 module. i connected the calc to my arduino using a 2.5mm jack. i used the Articl library, and it seems to work for sending characters from Arduino to a calc. i have no idea how to receive it from the calc. my idea is to get the sending and recieving from the serial monitor and calc achieved. if that is working, then i replicate this on another TI84+ calc and then use the nrf24l01 to allow both calculators to communicate wirelessly. i'm really bad at coding and don't have much experience with TI calculators. i need someone to help me code the Arduino and TI 84 calculators for this project. ty!