The issue I have: when I dont have my finger in the module it get the the pulseOximeter_ProbeAttached event and
pulseOximeter_Heartbeat event. When I insert my finger the pulseOximeter_Heartbeat event stops and I cant measure any readings.
If I boot the device with the finger inserted no events are fired.
Have looked over the code and not much I can do or change, the triggers for these events are deep under my code.
Any tips or known issues?
Have tried to search the forums without any luck.
The code:
In ProgramStarted()
pulseOximeter.ProbeAttached += new PulseOximeter.ProbeAttachedHandler(pulseOximeter_ProbeAttached);
pulseOximeter.ProbeDetached += new PulseOximeter.ProbeDetachedHandler(pulseOximeter_ProbeDetached);
pulseOximeter.Heartbeat += new PulseOximeter.HeartbeatHandler(pulseOximeter_Heartbeat);
I basically copied your code so thanks for the example. It looks like my probe does the invers of what it should do. I get a heartbeat when there are no finger and no heartbeat with the finger inserted. It does not detect any Attached/detached events other than attached at program startup if there are no finger attached.
Cant understand what the problem is other then maybe a broken probe but it is brand new…
I have not given up on my Pulse SPO2 project but cant get it to work. Tried a couple of samples but they all give the same result.
If I start the program without my finger in the probe the ProbeAttached is fired at startup, and I keep getting Heartbeat event with static readings.
If I insert my finger, Heartbeat stops and no other events are fired. Remove finger and Heartbeat start firing again.
If I start my application with the finger in the probe the ProbeAttached event is NOT fired before I remove my finger and then I get Heartbeat events. It look inverted in some sort.
I have included my code latest test code but cant see what can be wrong.
Any pointers from GHI on this? Is my probe defect?
// This method is run when the mainboard is powered up or reset.
void ProgramStarted()
{
/*******************************************************************************************
Modules added in the Program.gadgeteer designer view are used by typing
their name followed by a period, e.g. button. or camera.
Many modules generate useful events. Type +=<tab><tab> to add a handler to an event, e.g.:
button.ButtonPressed +=<tab><tab>
If you want to do something periodically, use a GT.Timer and handle its Tick event, e.g.:
GT.Timer timer = new GT.Timer(1000); // every second (1000ms)
timer.Tick +=<tab><tab>
timer.Start();
*******************************************************************************************/
// Use Debug.Print to show messages in Visual Studio's "Output" window during debugging.
// Event will fire when the probe has been placed on a finger
pulseOximeter.ProbeAttached += new PulseOximeter.ProbeAttachedHandler(pulseOximeter_ProbeAttached);
// Event will fire when a probe has been removed from a finger
pulseOximeter.ProbeDetached += new PulseOximeter.ProbeDetachedHandler(pulseOximeter_ProbeDetached);
pulseOximeter.Heartbeat += new PulseOximeter.HeartbeatHandler(pulseOximeter_Heartbeat);
}
void pulseOximeter_ProbeDetached(PulseOximeter sender)
{
Debug.Print("Probe Detached");
}
void pulseOximeter_ProbeAttached(PulseOximeter sender)
{
Debug.Print("Probe Attached");
}
void pulseOximeter_Heartbeat(PulseOximeter sender, PulseOximeter.Reading reading)
{
Debug.Print("Heartbeat");
Debug.Print("Pulse: " + reading.PulseRate);
Debug.Print("SPO2: " + reading.SPO2);
Debug.Print("Signal: " + reading.SignalStrength);
}
One other person I helped figured power problems were the cause of similar problems they were having (driving a display and the oximeter), I don’t have a FEZ Cobra II so I can’t try to replicate your project here, but maybe someone else can.
@ Duke Nukem, external power supply did the trick, thanks for the tip…
Should be dockumented some place, I am running the FEZ Cobra II Net with only this module, no display nothing and it was not able to power the system using USB…
