Reliability?
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Was excited last night, a new batch of DS18B20 arrived, so I connected it, uploaded the original sketch and........ This morning @ 4:48 with a temp of 74.6F it locked up.
Well, I guess it's not the DS18B20 hardware... This is just ridiculous, I've got to be doing something wrong here....
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As suggested by @gregl, I loaded the 'single' sketch found in the MySensors download on one of the other sensors that was locking up and put it in the freezer for ~2 days. Removed it this morning, and connected it to the serial monitor. (there was a power cycle when moving from the batteries to the serial connector) and it was humming along just fine.
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@ServiceXp said:
As suggested by @gregl, I loaded the 'single' sketch found in the MySensors download on one of the other sensors that was locking up and put it in the freezer for ~2 days. Removed it this morning, and connected it to the serial monitor. (there was a power cycle when moving from the batteries to the serial connector) and it was humming along just fine.
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Wouldnt that power cycle have also reset any evidence of if the sketch was hanging? try connecting just a wire from gnd to gnd and the TX from the mini pro to the RX on your programmer.
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Can you post ( codebender) your sketch as you have it? I can run it up and see if i can replicate.
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@ServiceXp said:
As suggested by @gregl, I loaded the 'single' sketch found in the MySensors download on one of the other sensors that was locking up and put it in the freezer for ~2 days. Removed it this morning, and connected it to the serial monitor. (there was a power cycle when moving from the batteries to the serial connector) and it was humming along just fine.
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Wouldnt that power cycle have also reset any evidence of if the sketch was hanging? try connecting just a wire from gnd to gnd and the TX from the mini pro to the RX on your programmer.
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Can you post ( codebender) your sketch as you have it? I can run it up and see if i can replicate.
- 'most' of the time, when this 'event' takes place the Arduino's eeprom has to be cleared and new sketch uploaded. I would say 7 out of 10 times this is necessary. One time disconnecting the DS18B20 allowed the Arduino to restart, and a few times connecting the Arduino to the programmer allowed it to restart.
I updated the DallasTemperature and OneWire libraries to the most recent version I could find yesterday, and so far (it's been about 13 hrs so more time is needed) this Arduino is still functioning. I also changed power source (so I could monitor the communications) using the programmer. It has locked up in the past using the programmer, which led me to think it's NOT a power issue, but really at this point I'm running out of hair to pull out.
CodeBender doesn't seem to be working ATM.. When it comes back I'll post the sketch..
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- 'most' of the time, when this 'event' takes place the Arduino's eeprom has to be cleared and new sketch uploaded. I would say 7 out of 10 times this is necessary. One time disconnecting the DS18B20 allowed the Arduino to restart, and a few times connecting the Arduino to the programmer allowed it to restart.
I updated the DallasTemperature and OneWire libraries to the most recent version I could find yesterday, and so far (it's been about 13 hrs so more time is needed) this Arduino is still functioning. I also changed power source (so I could monitor the communications) using the programmer. It has locked up in the past using the programmer, which led me to think it's NOT a power issue, but really at this point I'm running out of hair to pull out.
CodeBender doesn't seem to be working ATM.. When it comes back I'll post the sketch..
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Wouldn't it be the problem when putting the sensor in the freezer which could affect the chip timings/wire resistance (rise/fall timings) over time where it is possible that the one wire library hangs because it maybe reads malformed data because of this?
I haven't read all the posts but does it also lock up outside the freezer?
I'm no expert but it just came into mind
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@ServiceXp short question; how does the sketch behave when started without a ds1820 connected? Does it hang?
@Yveaux
It still locks up. When the code that gets the temp is commented out, then it does not lock up.By the way, the EH40 project sensor is still running. I'm getting optimistic about the new library's. If I get another 12 hours, I will be VERY happy.
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Wouldn't it be the problem when putting the sensor in the freezer which could affect the chip timings/wire resistance (rise/fall timings) over time where it is possible that the one wire library hangs because it maybe reads malformed data because of this?
I haven't read all the posts but does it also lock up outside the freezer?
I'm no expert but it just came into mind
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Well, all the sensors as still running YEAH YEAH YEAH...
I think this problem is finally behind me. We have not locked up since moving to the latest versions of the DallasTemperature and OneWire libraries.
Not sure what the differences are between the MySensor download versions and the latest, but it appears that was indeed the cause.
Is there any way the MySensor project download can be updated to include the latest version of these libraries?
Thanks to all who gave suggestions and time in helping me sort this out. I was very close to throwing in the towel..
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