ADD Z-modem function support for serial terminal please

[musicwei]

version 1.0.164. when i use sz (send a file via zmodem)in a serial terminal it works fine,but rz will end with error ZMODEM Session started be50

Error Received unsupported header: ZNAK

[Ekkone]

me too

[lozenyin]

我也出现了这样的情况，请问是不支持串口上传的功能吗？

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This happened to me too, is it because the serial port upload function is not supported?

[alanhe421]

So what is the direct cause of this error?

Received unsupported header: ZNAK