On 10/17/21 7:26 PM, vhsproducts via groups.io wrote:
Compton,
Why not reset the timer more often? (Every day?) Are you finding that once a week is enough to keep the units running reliably? Our problem is not being able to replicate the hanging complaint in a TT4 or an MTT4BT. I recently found that the MAX232 chip has a non-documented problem that occasionally causes the chip to lock up, overheat, and draw a bunch of excess power ( Google "MAX232 overheating" and you will see that the problem with the chip has been going on for years with no satisfactory explanation)
An open input might be asking for trouble. On something where the serial port isn't being used, a connector wired to pull the input to a known state might help.
Putting one of the problem systems in a location where it was easier to troubleshoot when it failed would probably help a lot.
--
David Schultz
