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I have a ZMEAUZB1 dongle. and i download a UPD_FIRMWARE_UZB_STATIC_3ch_ZME_05_19_04000001_ZME_05_1b_04000001.bin
{
"id": "244",
"baseid": "",
"enabled": "disabled",
"type": "firmware",
"file": "bin",
"vendorID": "277",
"bootloaderCRC": "40196",
"appVersionMajor": "5",
"appVersionMinor": "25",
"targetBootloaderCRC": null,
"targetAppVersionMajor": "5",
"targetAppVersionMinor": "27",
"fileURL": "UPD_FIRMWARE_UZB_STATIC_3ch_ZME_05_19_04000001_ZME_05_1b_04000001.bin",
"released": "2017-10-05",
"comment": "Update from 5.25 to 5.27 firmware for JP/TW/KR",
"position": "1",
"version": "5.25"
},

then do this
./ZMESerialUpdater serialapi_uzbupdate -d /dev/ttyACM0 -f UPD_FIRMWARE_UZB_STATIC_3ch_ZME_05_19_04000001_ZME_05_1b_04000001.bin
after that i try to change frequency "KR" but i can't
pi@raspberrypi:~/ZMESerialUpdater/arm $ ./ZMESerialUpdater serialapi_freq -d /dev/ttyACM0 KR



Archiving log please wait...


Z-WAVE Serial API Tool
Version:LWE0.9
by Z-WAVE>ME


usage: ZMESerialUpdater serialapi_freq [-h] [-d DEVICE] [-sa [SIMPLIFIED_API]]
{EU,RU,US,IN,ANZ,HK,CN,JP,IL,MY}
ZMESerialUpdater serialapi_freq: error: argument frequency: invalid choice: 'KR' (choose from 'EU', 'RU', 'US', 'IN', 'ANZ', 'HK', 'CN', 'JP', 'IL', 'MY')

I choose the wrong firmware version?

We will check it. May be KR is missing in the tool.

Please use meanwhile https://z-wave.me/download/changezwf.sh

This should work.
The other command will be fixed too.