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readme.md

Various utility scripts useful when modding / reversing firmware.

All scripts uses my library libuvk5.py. Scripts tested only on windows.

To read write access COM Port (Serial/USB Cable) must be the Serial Module installed into Python.

Install from command prompt/cmd the serial module for Python:

pip install pyserial

Do not confuse with serial module which is incompatible with this lib.

fw_unpack.py

Usage sample:

fw_unpack.py k5_v2.01.19_publish.bin

Sample output:

CRC OK
Saved decoded firmware to k5_v2.01.19_publish.dec.bin
Saved version info to k5_v2.01.19_publish.ver.bin

Description:
Scripts checks file's CRC then decode it and creates two new files with suffix .dec.bin and .ver.bin. If you just want to revere engineer file then only first file is needed. Second one is used by next script fw_pack.py to put together file ready to upload to device.

fw_pack.py

Usage sample:

fw_pack.py k5_v2.01.19_publish.dec.bin k5_v2.01.19_publish.ver.bin k5_v2.01.19_reassembled.bin

Sample output:

Saved encoded firmware to k5_v2.01.19_reassembled.bin

Description:
It creates encoded file with correct CRC and version bytes inserted in file. Ready for use with orginal updater.

configmem_read.py

Arguments:

configmem_read.py <COMx> <address> <len>

Usage sample:

configmem_read.py COM4 0x0F40 8

Sample output:

00010001010101ff

Description:
Script reads contents of configuration memory directly to console.

configmem_write.py

Arguments:

configmem_write.py <COMx> <address> <hex_payload>

Usage sample:

configmem_write.py COM4 0x0F40 00010001010101ff

Sample output:

PAYLOAD= 00010001010101ff

Description:
Script writes bytes given in payload directly to device. Payload has to be multiply of 8 bytes

reboot_radio.py

Arguments:

reboot_radio.py <COMx>

Usage sample:

reboot_radio.py COM4

Description:
Script just reboots device. Command not produce any output in normal situation. Usefull for example after using configmem_write.py

batt_calibrator.py

Arguments:

batt_calibrator.py <COMx> <read | write  val0 val1 val2 val3 val4 val5 | calibrate>

To calibrate ADC so battery voltage display more accurately invoke batt_calibrator.py COM1 calibrate like below:

> batt_calibrator.py COM1 calibrate
Enter voltage from multimeter and press enter:

now follow steps:

  • connect radio to PC
  • power on radio
  • lay your radio with display to the bottom and battery up
  • measure voltage on two exposed pad on bottom of the battery
  • wait till voltage stabilizes
  • write measuder voltage in format 1.23 or 1,23 it shoudl not matter
  • hit enter
  • reboot radio

You can backup current calibration values by starting batt_calibrator.py COM1 read

To read more about values and its meaning please refer to documentation.