Software alone is useless without the proper hardware interface. To program your GM338, assemble the following tools:
✅ Professional Series CPS R06.12.00 (found via ham radio forums). ✅ Cable: USB Programming Cable with FTDI chip (~$20 on Amazon/eBay). ✅ PC: Windows 10 with COM port forced to 1-4 and speed set to 9600. ✅ Method: Always Read before Write. Never create a new codeplug; modify an existing one.
Whether you are using a or an older serial cable setup?
Ensure the radio cable remains securely attached and power is stable. motorola gm338 programming software free best
Connect the cable to the front mic jack of the GM338 and power on the radio. Launch the CPS software.
Is CPS free? CPS Software for MOTOTRBO & ASTRO is free, and can be accessed through the Software Downloads pages linked above. Motorola Solutions Support Motorola CPS is now Free I'm Told! : r/MotorolaSolutions
By utilizing the appropriate R03.x software and having the correct hardware, the Motorola GM338 can be programmed successfully for any commercial or specialized radio application. Software alone is useless without the proper hardware
You can toggle between high power (up to 25W–45W depending on model) and low power (often 1W–5W) for different use cases.
Motorola Solutions retains the copyright for its programming software. Officially, the software requires a paid license and account through the Motorola Solutions Media Mol (MyView) portal.
Click on > Preferences (or Set COM Port ) and match it to the number found in Device Manager. 3. Read the Radio (Crucial Step) Never write a blank or random codeplug to your radio. Click the Read button (or press Ctrl + R ). The software will pull the current data from the radio. ✅ PC: Windows 10 with COM port forced
: This version is a specialized derivative of the official software, often found on online forums and databases. It's crucial to note that while it's a free version for many, it's not an official release and comes with no support. It does, however, support both the GP338 handheld and GM338 mobile radios , making it a versatile tool for users of either platform. However, it may lack some advanced features or support for later firmware revisions.
To configure the radio effectively, you will need the following components:
Software is only half the battle. To connect your radio to a computer, you will need the appropriate hardware.