Send ZLP (Zero Length Packet) over COM port

[CERTUser22]

I sniffed Odin while flash and see 0 byte packet being sent to phone. How do I send 0 byte packet? I try "0", "00", "0x00" and none of these work.

I using serialport with c#. Wrong programming language to do this in? Secret I do not know about? Would greatly appreciate any help!

[cafonabob1]

This is easy. I know how to do it.

[CERTUser22]

I was able to do it over CDC interface (USB) but COM port just ignore 0 byte packet. My program say "0 bytes were written" but in USB logger there was not zero byte packet sent. Very confusing. Perhaps encoding while sending it over COM port? I try "", " ", "\0", NULL, 0x00 and 0. None of them work over COM port. This works over CDC interface in C#:

string testzero = "0";
byte[] testzerobyte = Encoding.Default.GetBytes(testzero);

Then I send testzerobyte to CDC interface and zero byte packet show up in USB log. I try to do same thing over COM/Serial interface and zero byte packet never show up in USB log.

[CERTUser22]

Originally Posted by cafonabob1

This is easy. I know how to do it.

Lol. Actually you can't do it over the COM port exposed by the CDC interface. Nice try clown. Go back under your bridge troll. I've already figured out how to do this over the COM port instead of the CDC interface just like Odin. It has nothing to do with ZLP.

[oakieville]

Any chance you can share the method