(Almost) identical software, doesn't work the same

sinnadyr · **Joined:** Wed Feb 22, 2012 1:34 pm **Posts:** 22

Hi!

I am trying to send data from two slaves to one master.

First, the master initiates the clock, send a synchronization signal to both slaves so they can set the clock.
Then the two slaves send their sensor data (having trouble with sending some, so I send pre-defined data instead but this doesn't matter now), but only one of the slaves sends the actual data.

Please, have a look at this: http://diffchecker.com/00G92F2
It is the difference between the two files.

The left one sends all data correct, while the right one only sends payload[0] correct.

Please, can anyone suggest why? Thank you very much in advance.
There is a lot of code, but this is done for debugging purposes.

libelium-dev · **Joined:** Mon Sep 28, 2009 1:06 pm **Posts:** 7508

sinnadyr,

First of all sorry about delay answering.

While we think in your issue, did you tested both slaves separately?
Besides that, did you try to send a "hello word" message with both slaves?

Tell us in the meantime.

Regards.

libelium-dev · **Joined:** Mon Sep 28, 2009 1:06 pm **Posts:** 7508

sinnadyr,

thinking about your issue, it would be good if you introduce a random delay to avoid packet collision.

We do something similar in our API, but you can generate random delay in your preferred way.

random delay wrote:

srand(millis()); // set seed
delay( (rand()%1000+ 1) ); // delay between 1ms and 1s

Try this and tell us what happens.

best regards.