My apologies; this message got buried
If I recall correctly, we tried setting the alarm thresholds on the
18B20's, then execute a syncronous convert, and all the temp sensors
show up in alarm, even though their temperature hasn't changed. We
tried to continue, in case it was just a temporary
And currently the temperature alarming is very, very broke.
We have a situation where we have many temperature sensors sharing a
onewire bus with many other sensors, for which we're already using
alarming (total of ~40-70 sensors per bus; collection of 2406, 18B20,
and 2450). We'd like to use
On Mon, Apr 28, 2008 at 1:10 PM, Jim Kusznir [EMAIL PROTECTED] wrote:
And currently the temperature alarming is very, very broke.
This is the first report on this problem. Can you tell me more?
Looking through the data sheet (
http://datasheets.maxim-ic.com/en/ds/DS18B20.pdf) the alarm
Paul Alfille wrote:
Have you seen my report about the cvs and DS2413?
Yes, can you test again?
Sorry I've been busy in the last couple of days.
I'm going to test it in the next few minutes but tell me one thing:
where should I read the current status of the switches? PIO.A/B or
Reading:
Latch shows what you set
PIO shows what it senses (only useful if switch is off).
On Mon, Apr 28, 2008 at 5:38 PM, Alessio Sangalli [EMAIL PROTECTED]
wrote:
Paul Alfille wrote:
Have you seen my report about the cvs and DS2413?
Yes, can you test again?
Sorry I've been busy
Paul Alfille wrote:
Reading:
Latch shows what you set
PIO shows what it senses (only useful if switch is off).
Ok. So, the report is, I cannot *set* any value with CVS version...
writing 0 or 1 to PIO.A/B does not change the status of the device.
2.7p4 works fine.
bye
Alessio
For a couple of sensors, you may as well just monitor directly. You can do
more sophisticated temperature control that way as well (rate of change,
etc)
You will have to do temperature measurements in any case. The alarms only
make sense if you have many non-parasitic sensors and do a
Hi, in my embedded application I want to monitor a couple of temperature
sensors and, when the value goes below a certain amount, switch on some
heaters using a pin of the DS2413.
Now: what would you use? A simple script that polls the sensors with
owread and turn on/off the heaters with a
Paul Alfille wrote:
For a couple of sensors, you may as well just monitor directly. You can
Ok thanks.
Have you seen my report about the cvs and DS2413?
bye
Alessio
-
This SF.net email is sponsored by the 2008
