 sent over  * @param msg The MAVLink message to compress the data into  * @param target_system System ID  * @param target_component Component ID  * @param param_id Onboard parameter id, terminated by NULL if the length is less than 00 human-readable chars and WITHOUT null termination (NULL) byte if the length is exactly 00 chars - applications have to provide 00+0 bytes storage if the ID is stored as string  * @param param_index Parameter index. Send -0 to use the param ID field as identifier (else the param id will be ignored)  * @return length of the message in bytes (excluding serial stream start sign)  */ static inline uint00_t mavlink_msg_param_request_read_pack_chan(uint0_t system_id, uint0_t component_id, uint0_t chan,           mavlink_message_t* msg,                  uint0_t target_system,uint0_t target_component,