Author Topic: USB TTL send Boot2 gives connection failure  (Read 2147 times)

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Offline SuperX

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USB TTL send Boot2 gives connection failure
« on: August 02, 2021, 07:31:57 am »
Sorry for reposting this from Ti-Planet ( but I´m really worried about this

I´m trying to send the Boot 2 to my calculator with Hyperterminal but once I get into the menu to flash it with DOC+ENTER+2 , I get the text saying "Begin XMODEM file transfer" which is fine but then a bunch of strange symbols ("") start to happear and if I try to send it to the calculator it just gives connection failure.

Here is a screenshot:

Edit:Sorry, I´ve already found the solution but fogot to say here. Go to the link down below over Ti-Planet. Thank You
What should I do now?

Note:If I don´t connect USB TTL to the PC just to the calculator. It gives me steady red and steady green
« Last Edit: August 04, 2021, 11:13:48 am by SuperX »

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Re: USB TTL send Boot2 gives connection failure
« Reply #1 on: August 04, 2021, 11:10:50 am »
For anybody who finds this thread, the OP found the solution:
After some hours trying to desperatly find the solution. I finally sent the Boot 2 successfully.

Here´s what you need to do.

First, try to see if you have slimmer cables if the ones you have are not so slim. That will be handy. To determine if they are slim enough, just see if it´s easy to stuck them correctly by just pushing it under the plastic cover in the connectors. The cables I was using weren´t exactly that slim, sometimes they would stick and when they did just a small movement would make them fall.

And once you go to the "Begin XMODEM file transfer" message, just carefully start to play around with the TXd cable (don´t let the other cables move) connected to your calculator. Start to push it or pulling it accordingly until those sybols in the screenshot stop multiplying. Once they do, send it normally.