How do I send the license by serial to the ht-m00

What software do you use to license by serial? I used putty and kitty but neither allows me to write

I use XCOM.You can download and use it.

If I search for xcom, I only get a game

You can try this.

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use Arduino or any terminal program and send AT+CDKEY=3BEF26XXX3E4D765XXXAC41XXX255ABB
unfortunately the gateway does not return characters
However, the AT command accepts the license
and inserts the license into the chip

I used czech Hercules is great utility if you are working with the serial devices

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the problem was the firmware version, thank you very much