Good practices

Sending important amount of data

Advices about Embedded platform

2 things to pay attention to.

• Average amount of data sent (in order to not go beyond baudrate)
• Burst data amount vs TX buffer size

If sending arrays in a loop, always compute burst amount of data.

Ex : array of 128 items. Estimate size of a frame: amount of chars in topic + 1 (string \0) + size of data + 2 (for CRC) + 2 (for framing). Rule of thumbs : For short topics (3 characters + indexing), a frame is ~ 16 bytes.

Then multiply by amount of items to send. 128 * 16 = 2048. This is your burst amount of data. Make sure the TX buffer is at least this size otherwise frames are going to be lost.