how ping packet looks like? about androidtv-remote HOT 3 CLOSED

No.
You need to analyse the frame - read this doc to understand : https://developers.google.com/protocol-buffers/docs/encoding
1rst byte is the length of the frame
2nd byte is the composition of field number and wire type
This second byte is by definition composed of 8 bits 0 or 1 : 10101010
You need to take 5th first bits and convert it to int : it’s your field number => 8 is the ping field number
The last 3 bits represent the wire type (2 it’s a embedded messages)

from androidtv-remote.

Ping request is formed by two varint, you need to resend only first :

Receive : 9,66,7,8,1,16,148,250,150,55 09420708011094fa9637
Receive : {"remotePingRequest":{"val1":1,"val2":115719444}}

Sending 4,74,2,8,1 044a020801
Sending {"remotePingResponse":{"val1":1}}

proto form is here simple :

RemotePingRequest remote_ping_request = 8;
RemotePingResponse remote_ping_response = 9;

message RemotePingResponse {
int32 val1 = 1;
}

message RemotePingRequest {
int32 val1 = 1;
int32 val2 = 2;
}

You can deduce ping request from https://protogen.marcgravell.com/decode by tapping hex form without length of your buffer : 420708011094fa9637

Field #8: 42 String Length = 7, Hex = 07, UTF8 = "������7"
As sub-object :
Field #1: 42 Varint Value = 1, Hex = 07
Field #2: 08 Varint Value = 115719444, Hex = 01-10-94-FA

from androidtv-remote.

I am not sure I understand your answer.
when I get a message from the tv, how can I identify that message as a ping request?
I need to parse the bytes into a hex string, and then if the length of the hex string is 7, it means it's a ping request?

from androidtv-remote.