rosserial_arduino avoid lost messages

asked 2014-11-24 10:14:18 -0500

Wedontplay
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Hi, i'm using rosserial_arduino package to communicate with my robot hardware. I'm noticing that some messages are lost in both ways (Arduino->Desktop & Desktop->Arduino) I'm not publishing at high speed, to be more precise messages are sent with several seconds interval between them.

Is there a way to make message delivery guaranteed? I can wrap messages in services and use the service responses as aknowledges for but it sounds pretty ugly.

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answered 2014-11-24 18:27:53 -0500

Wedontplay
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After some "in depth" debugging I discovered that in my case the problem was caused by a buffer overflow on arduino serial rx buffer. In this case higher baud rates increase the problem :) Is easy to modify the buffer size on arduino source though.

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answered 2014-11-24 17:56:07 -0500

Wes G

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I'm going through something similar with my project. I suggest upping the baud rate (this answer explains how to do that), making sure you aren't sending or receiving too much data and limit the publishing rate to the minimum. I'm exploring the limits of the Arduino MEGA with my current system and with the different encoders, sensors and motor outputs, I may have to move to a second Arduino in the future.

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