4 replies to this topic

[Arron Chapman]

I have some code which reads from an analog temperature sensor, then displays the result (converted to F) on a small LCD. When I run the code with the USB attached it will run fine for hours, however when I run it on battery power it stops working after a few minutes, until I reset it. When this happens I can ping it from MFDeploy (after I reattach the USB cable). I have attached the project that I'm using.

Attached Files

•  Analog Temp Sensor.zip   118.41KB   2 downloads

[haxburgen]

This happens to me when I try to get a HttpWebResponse. I know this doesn't help you, but I think there might be an underlying connection.

[Chris Walker]

Hi Arron, What type of battery and voltage are you running it off of? Using the DC power barrel? Also--if you run the program powered via USB--but not connected to the debugger--does it work fine there? Chris

[Arron Chapman]

This happens to me when I try to get a HttpWebResponse. I know this doesn't help you, but I think there might be an underlying connection.

I'm certainly not using HtthWebResponse, however there may be a related issue. Also have you posted about this somewhere else, I'd like to take a look at your code.

Hi Arron,

What type of battery and voltage are you running it off of? Using the DC power barrel?

Also--if you run the program powered via USB--but not connected to the debugger--does it work fine there?

Chris

I'm using a 7.2V battery pack with the barrel jack. I powered the setup with USB (no debugging, used an iPod wall adaptor), so far it's run longer than I recall it ever running on the battery.

[Stefan W.]

7.2V is below the specs - the netduino asks for at least 7.5V as unregulated input (which means in case of battery you should aim for more since the voltage drops as the battery discharges). This might be the cause for your stability issues ...