Elevon_left - elevon_right

ArduCopter
1

i want to send ElevonLeft - ElevonRight from esp32to ardupilot throw mavlink command
i use this message code
mavlink_msg_rc_channels_override_pack(
system_id,
component_id,
&msg,
target_system,
target_component,
elevonLeft,
elevonRight,
throttle,
0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0
);

uint16_t len = mavlink_msg_to_send_buffer(buf, &msg);
SerialMAV.write(buf, len);

but isn’t work