RF Explorer 3G+ IoT on RPi4

[karu2003]

Has anyone managed to get this board(RF Explorer 3G+ IoT) up and running on Python 3.13 on Raspberry Pi 4? PIN21 goes high once and then stays at zero. After I changed the PIN to always be at one (500000), I got this
RFE_Example_IoT_2.pymple_IoT_2.py
Detected COM ports:

• /dev/ttyS0
• /dev/ttyAMA0
  Detected OS: Linux
  Error in RFCommunicator - IsConnectedPort()Could not configure port: (5, 'Input/output error')
  /dev/ttyAMA0 is a valid available port.
  RF Explorer Valid Ports found: 1 - /dev/ttyAMA0
  User COM port: void
  Connected: /dev/ttyAMA0, 500000 bauds
  Waiting for reset (calling ProcessReceivedString)...
  Requesting config...
  RF Explorer 01.16 18-Jan-18 02.01.01
  Calibrated:1
  User settings: Span: 100MHz - Start freq: 500MHz - Stop freq: 900MHz
  Max Span size: 100.0MHz (using device max)
  Device max freq: 440.0MHz (using device range)
  RF Explorer 01.16 18-Jan-18 02.01.01
  Calibrated:1
  RF Explorer 01.16 18-Jan-18 02.01.01
  Calibrated:1
  But it didn't work anymore.
  Do you have proper documentation?
  I don't want to throw €130 in the trash.

[karu2003]

How can I update the firmware RF Explorer 3G+ IoT on a Raspberry Pi 4?
Your examples only work at speeds up to 2400. :(

[karu2003]

There's no support for the latest Linux and Python.
I wasted $130. plus the time I spent trying to get this device to work on the Raspberry Pi 4. :(