[Youtube] LN882H module pinout and setup for flashing - step by step video guide

$ strings tyutool_cli | grep import
import sys; sys.stdout.flush();                 (sys.__stdout__.flush if sys.__stdout__                 is not sys.stdout else (lambda: None))()
import sys; sys.stderr.flush();                 (sys.__stderr__.flush if sys.__stderr__                 is not sys.stderr else (lambda: None))()

$ git clone https://github.com/extremecoders-re/pyinstxtractor.git
$ cd pyinstxtractor
# it only worked partially with a different python version, it has to match the python used in the binary
$ python38 pyinstxtractor.py tyutool_cli
[+] Processing tyutool_cli
[+] Pyinstaller version: 2.1+
[+] Python version: 3.8
[+] Length of package: 9832132 bytes
[+] Found 55 files in CArchive
[+] Beginning extraction...please standby
[+] Possible entry point: pyiboot01_bootstrap.pyc
[+] Possible entry point: pyi_rth_inspect.pyc
[+] Possible entry point: pyi_rth_multiprocessing.pyc
[+] Possible entry point: pyi_rth_pkgutil.pyc
[+] Possible entry point: tyutool_cli.pyc
[+] Found 798 files in PYZ archive
[+] Successfully extracted pyinstaller archive: tyutool_cli

You can now use a python decompiler on the pyc files within the extracted directory
$ cd tyutool_cli_extracted
$ ls
base_library.zip    importlib_metadata-8.5.0.dist-info  lib-dynload    liblzma.so.5         libssl.so.1.1  pyiboot01_bootstrap.pyc  pyimod03_ctypes.pyc          pyi_rth_pkgutil.pyc   struct.pyc
certifi             libbz2.so.1.0                       libexpat.so.1  libmpdec.so.2        libuuid.so.1   pyimod01_archive.pyc     pyi_rth_inspect.pyc          PYZ-00.pyz            tyutool_cli.pyc
charset_normalizer  libcrypto.so.1.1                    libffi.so.7    libpython3.8.so.1.0  libz.so.1      pyimod02_importers.pyc   pyi_rth_multiprocessing.pyc  PYZ-00.pyz_extracted  yaml

 
$ mkdir -p src/tyutool/
$ decompyle3 -o src tyutool_cli.pyc
$ decompyle3 -r -o src/tyutool PYZ-00.pyz_extracted/tyutool/

$ cat src/tyutool/flash/ln882h/ln882h_flash.py | grep -A20 'def check_ram_mode'
    def check_ram_mode(self, times=2, timeout=1):
        data = "version\r\n"
        self.reset()
        self.send_data(data.encode("utf-8"))
        uart_rx_byte = self.read_line(times, timeout)
        self.log.debug(f"check_ram_mode receive: {uart_rx_byte}")
        if "RAMCODE".encode("utf-8") in uart_rx_byte:
            return True
        return False

    def get_flash_uuid(self):
        data = "flash_uid\r\n"
        self.reset()
        self.send_data(data.encode("utf-8"))
        flash_uid = self.read_line(2, timeout=1)
        if len(flash_uid) >= 30:
            return flash_uid
        return False

    def flash_set_addr(self):
        data = "startaddr 0x0\r\n"