send custom command error when we use comma

When we want to send a custom command to a device with parameters, we need to insert commas,
for example, fifotrack protocol, Output control command is B12,1,0,20

Illegal hexadecimal character , at index 3 - DecoderException (... < DataConverter:29 < BaseProtocol:99 < ActiveDevice:48 < ...)

Looks like you have to send full message in HEX format.

but in the code shows like this.

private Object formatCommand(Command command, String content) {
    String uniqueId = getUniqueId(command.getDeviceId());
    int length = 1 + uniqueId.length() + 3 + content.length();
    String result = String.format("##%02d,%s,1,%s*", length, uniqueId, content);
    result += Checksum.sum(result) + "\r\n";
    return result;
}

@Override
protected Object encodeCommand(Command command) {

    switch (command.getType()) {
        case Command.TYPE_CUSTOM:
            return formatCommand(command, command.getString(Command.KEY_DATA));
        case Command.TYPE_REQUEST_PHOTO:
            return formatCommand(command, "D05,3");
        default:
            return null;
    }
}

I don't see it. Can you please send a link to the file on GitHub.

its https://github.com/traccar/traccar/blob/master/src/main/java/org/traccar/protocol/FifotrackProtocolEncoder.java

Interesting. Yes, I think it should work. Is your device connected?

Yes, I checked again, it works.
Thanks for your time.