anyone need POGO cable for HP 20b/30b, HP 15C LE?

[fossy]

Hello,

the discription of the converter was not 100% clear for me, but I could realize it. For all other I will post my additional description with drawings an photos.

Another question for me was "how to programm the LE". The SamBa.exe mentioned in the descripton for the new programming cable does not work to program the LE. BTW. the LE need another firmware. The firmware of the CE does not work for the LE.

POGO connector of the LE:
   

Converter for the new programming cable to program the LE
   

Drawing of cable and converter with pinning

   

Pinning of USB-A
https://allpinouts.org/pinouts/connector...erial-bus/

Firmware for the LE
<https://www.hpmuseum.org/forum/thread-18491.html>

find the post of "Katie Wasserman" and the links

• Version 4/11/11 2011-04-11
• Version 4/15/11 2011-04-15 this is the firmware the LE was sold with
• Version 8/19/09 2009-08-19
  

The oldest version (2009-08-19) does not have the PSE-Bug - but it has the Overflow-Bug and as mentioned later in the post eventually most other bugs.

The Overflow-Bug is also annoying. At overflow or when Flag 9 is set (SF 9) the display blink only once and is then off, but the calculator is still on. The blinking (and not seen blinking) can be stopped by [<-] or [ON] [ON].

Windows Program to program the LE

You will need the MySamBa.exe . It will run on a WinXP (and I think also on Win7, Win10, Win11).

Link to MySamBa.zip <https://sourceforge.net/projects/wp34s/files/FlashTool/>


Programming

If you connect the new cable with the converter and press ERASE and RESET you will erase (empty) the firmware. If you cannot program another (or the same) firmware your LE will be bricked.

Before you can programm the LE you must get it in the programming mode - sadly this will erase the actual firmware.

To erase the actual firmware and get the LE into the programming mode do

• press and hold ERASE
• press and release RESET
• release ERASE
• press and release ON
• press and release RESET
• press and release ON
  

After this start MySamBa.exe select the USB-serial converter (COM whatever on your computer), the firmware and press "Send" and wait (ca. 20 seconds).