I was hoping that it would be easy to reset, but no luck. I would like to do usb flash drive. I was expecting something different, maybe having it thermally bonded to the case to get a better response. We can do reusable for about the same cost as this Temptale one with software included for free. Support me and the blog with a small donation. I took of the battery and after re installing display stared flashing. It covers a temperature range of 0 to 30 degrees Celsius, and records data every 10 minutes for days.
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Another thing that I'm not sure about is how the thermistor is read, as the traces run into the chip on board.
Sensitech TempTale 4 Multi-Alarm Multi-Use USB Monitor.
I've been messing around with a couple of these units as well and figured I would share what I have discovered. They're typically used to monitor the temperature of stock through a logistics chain, be it refrigerated or not.
Grant Trebbin March 5, at It's also likely that it coordinates taking temperature measurements and storing them in memory. For example, if you run a grocery store and you notice that the quality of the fruit on sale isn't of an acceptable standard, you might get your supplier to put one of these in a delivery to monitor the temperature throughout the cold sensirech.
Anonymous April 6, at 7: The temptaoe provides some info as shown here, in reference to one of the units that was received this morning: To meet the requirement of days of operation it's likely that the micro-controller makes extensive use of sleep modes. The purpose of the Winbond kiB flash memory isn't clear to me.
It could have been mounted a little better, but I guess it does the job. Grant Trebbin July 26, at 4: At that price how could I not buy tsmptale to see how they worked. There is software to configure the device senitech may be able to reset it, but it's not free and not worth the effort. We can do reusable for about the same cost as this Temptale one with software included for free. Support it with a small donation.
Grant Trebbin: Sensitech TempTale 4 USB Teardown
There are little indentations on the back that I thought were part of the case, but it turns out that they are stick on covers that hide the screw head.
Grant Trebbin June 4, at 3: A temperature logger that runs for days should have some way to keep a stable time base, so there should be a real time clock somewhere, and sure enough, on the back, there's the expected 32 kHz watch crystal.
I also have one of these, and should be able to get many more. You may have a nagging feeling that something is missing. Unknown September 10, at If you find out any more about them I'd love to sfnsitech.
User Manuals
When plugged into a computer the temperature logger appears as a mass osftware device containing a pdf report and an encrypted file containing the logged data. Mine is blue, with exposed screws. How i can use this chip with usb?
The first is an Atmel 32 bit micro controller that handles the USB communication, and presumably generates the PDF report when the logger is plugged into a computer.
By Grant Trebbin at Grant Tempttale May 26, at 9: At work we go through about 40 of these a month, we do however send them back to our supplier who i assume resets and reuses them. At first I tried to do it carefully, but when it wouldn't come apart I assumed that it was ultrasonically welded to stop moisture ingress.
There is this ftp server that has the TTMD sw - ftp: Anonymous July 26, at 2: The traces from the crystal run into the chip on board assembly that contains the the driver for the LCD.
Finally we come to the actual sensor, it's a bead style thermistor.
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