Hi,
I'm implementing a simple message exchange between two motes (to measure
the RSSI, but this is not of interest) and
send the messages as broadcasts.
I'm using the TinyOS Basestation application with the Listen-Tool to
check which messages have been sent.
Here's the problem: I have two motes (call them A and B) with nearly
identical code flashed to them.
A sends a message (broadcast), and after that each mote will send a new
broadcast after receiving a packet.
All messages sent by A are also received, and thus displayed, by the
BaseStation-mote, and the LEDs indicate that
all messages are also received by B [otherwise only one message would be
sent anyway].
But, when B sends a message, it seems to be received by A [as A responds
with yet another packet], but is not displayed
by the BaseStation-App. I tried to verify this by flashing a third mote
with custom code, same issue.
If I just call the SendProbe-method [see below] on mote B it works fine
and switching motes doesn't help either.
LEDs suggest that the SendDone-Event is triggered on both motes.
Ultimately, it seems that the broadcasts are only received by the mote
from which the last message was received (?).
Is there any property of broadcasts that I am not aware of?
Here is the (relevant) code I use:
void SendProbe(){
probe = (ProbeMsg*)(call Packet.getPayload(&pkt,NULL));
probe->source = 1;
probe->counter = counter;
call AMSend.send(AM_BROADCAST_ADDR, &pkt, sizeof(ProbeMsg));
}
event message_t * Receive.receive(message_t *msg, void *payload,
uint8_t len){
if(len==sizeof(ProbeMsg)){
probe = (ProbeMsg*)payload;
call Timer.startOneShot(DELAY_BETWEEN_PROBES);
}
return msg;
}
event void Timer.fired(){
SendProbe();
}
Thanks for your help
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