Sending Commands to device, howto generate command?

Hello

i am using a gps tracker with t808 protocoll on port 5015
the tracker is working but i need to send several custom commands to it (enable/disable buzzer, enable/disable light)

using the website en.aika168.com i can see the payload for these commands.
But how can i send it with traccar?

here are the payloads:

light off
{SN:'19175676450',DeviceID:2886256,CommandType:'808DGXC',Model:510,Phones:'0'}
light on
{SN:'19175676450',DeviceID:2886256,CommandType:'808DGXC',Model:510,Phones:'1'}
buzzer off
{SN:'19175676450',DeviceID:2886256,CommandType:'808SYXC',Model:510,Phones:'0'}
buzzer on
{SN:'19175676450',DeviceID:2886256,CommandType:'808SYXC',Model:510,Phones:'1'}

How can i make a custom commands out of that?

Click send command and select the custom type. Not sure I understand the problem.

i captured those payload from the chinese site en.aika168.com.

now i need to translate them to a traccar custom command

So that's not the expected format? Then you need the protocol documentation to know the format.

the protocoll is jt808 and i have the docs.
but i need a little help please

i made this command while reading the tj808 docs:
7E8300000A019175676450000001286c65642c312c3129237E

but when i send it as custom command it get interpreted as payload and converted to hex to this:
7e830000330191756764500000013745383330303030304130313931373536373634353030303030303132383663363536343263333132633331323932333745257e

i made this command while reading the docs of the tracker for light control:
7e8105000101918102196600a121016E7e

but when i send it as custom command it get interpreted as payload and converted to hex to this:
7e8300002301917567645000000137653831303530303031303139313831303231393636303061313232303136463765317e

how can i prevent the new encoding and send exactly my given command?

It seems like we're currently automatically wrapping commands.

modified traccar and added new commands to server and web.
needed to modify the formatMessage to letz the message through without default modification

This should solve the problem:

https://github.com/traccar/traccar/commit/935cb849cbb11e85b0514eb9b9d8322274dc8897

yes that did it.
i will keep my modifications in my repo, because the device id will be automaticly set and i dont need to create one custom command for each device.
but your fix makes testing a command much easier
thank you for your help