Skip to main content
Version: 3.0.0

Send a basic message

To send a message, you have to:

  1. Create a message variable
  2. Set the target_mode
  3. Set the target
  4. Set the cmd
  5. Set your data size
  6. Set your data
  7. Send it.

// Create and fill the message info
msg_t pub_msg;
pub_msg.header.target_mode = SERVICEID;
pub_msg.header.target      = msg->header.source;
pub_msg.header.cmd         = IO_STATE;
pub_msg.header.size        = sizeof(char);
pub_msg.data[0]            = 0x01;
Luos_SendMsg(service, &pub_msg);
infos
  1. The function Luos_SendMsg returns an error_status that informs the user whether the message was stored in a buffer and is ready to be sent. User can monitor the returned value to be sure that the message will be sent.

  2. The Luos_SendMsg function is non blocking. This function loads the message into a Luos engine memory and Luos engine, leaded by your hardware, will send it as soon as possible.