Hello!
I am new to TinyOS and dont know C.
I have a what I think is a simple question.
I am programming my telosb motes on xubuntos in tinyos-2.x and I have
successfully changed the Oscilloscope application to use the onboard
SensirionSht11 temperature sensors.
What I want to do now is to have two different versions of the Oscilloscope
application.
Mote1 will measure the temperature and send its information to all motes in
range, which is working.
Mote2 will also measure the temperature, but also read the temperature from
mote 1 and then forward the mean value to mote3 with the unmodified BaseStation
application installed on it.
So to my question.
How do I modify the Oscilloscope application for mote 2, to be able to read the
message from mote1?
(Because of my lack of knowledge in C, I do not know how to retrieve the
message in the event message_t* Receive.receive)
Thanks for the help!
Best Regards
K
Here is the module code I am using for mote1:
OscilloscopeC.nc
#include "Timer.h"
#include "Oscilloscope.h"
module OscilloscopeC @safe()
{
uses {
interface Boot;
interface SplitControl as RadioControl;
interface AMSend;
interface Receive;
interface Timer<TMilli>;
interface Read<uint16_t>;
interface Leds;
}
}
implementation
{
message_t sendBuf;
bool sendBusy;
uint16_t Temp;
oscilloscope_t local;
uint8_t reading;
bool suppressCountChange;
void report_problem() { call Leds.led0Toggle(); }
void report_sent() { call Leds.led1Toggle(); }
void report_received() { call Leds.led2Toggle(); }
event void Boot.booted() {
local.interval = DEFAULT_INTERVAL;
local.id = TOS_NODE_ID;
if (call RadioControl.start() != SUCCESS)
report_problem();
}
void startTimer() {
call Timer.startPeriodic(local.interval);
reading = 0;
}
event void RadioControl.startDone(error_t error) {
startTimer();
}
event void RadioControl.stopDone(error_t error) {
}
event message_t* Receive.receive(message_t* msg, void* payload, uint8_t len) {
oscilloscope_t *omsg = payload;
report_received();
if (omsg->version > local.version)
{
local.version = omsg->version;
local.interval = omsg->interval;
startTimer();
}
if (omsg->count > local.count)
{
local.count = omsg->count;
suppressCountChange = TRUE;
}
return msg;
}
event void Timer.fired() {
if (reading == NREADINGS)
{
if (!sendBusy && sizeof local <= call AMSend.maxPayloadLength())
{
memcpy(call AMSend.getPayload(&sendBuf, sizeof(local)), &local, sizeof
local);
if (call AMSend.send(AM_BROADCAST_ADDR, &sendBuf, sizeof local) ==
SUCCESS)
sendBusy = TRUE;
}
if (!sendBusy)
report_problem();
reading = 0;
if (!suppressCountChange)
local.count++;
suppressCountChange = FALSE;
}
if (call Read.read() != SUCCESS)
report_problem();
}
event void AMSend.sendDone(message_t* msg, error_t error) {
if (error == SUCCESS)
report_sent();
else
report_problem();
sendBusy = FALSE;
}
event void Read.readDone(error_t result, uint16_t data) {
if (result != SUCCESS)
{
data = 0xffff;
report_problem();
}
if (reading < NREADINGS)
Temp = (-39.6 + 0.01 * data);
local.readings[reading++] = Temp;
}
}
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