I am having almost this exact issue - intermittently stops logging and controlling (LCD is frozen as well), but am getting “negative peak detected”. Would this also potentially be a power issue? For now my low tech solution is putting a power timer on the outlet to hard reset the machine every 6 hours
Aug 03 2016 10:23:08 controller debug message: INFO MESSAGE 18:
Negative peak detected: 46.5, estimated: 46.8. Previous cool
estimator: 3.779, New cool estimator: 3.779.
BrewPi: wifiChecker: Attempt 1 to reach 192.168.0.1 failed (Wed Aug 3 11:00:12 MDT 2016)
Aug 03 2016 11:10:13 controller debug message: INFO MESSAGE 18:
Negative peak detected: 46.7, estimated: 46.8. Previous cool
estimator: 3.779, New cool estimator: 3.779.
Aug 03 2016 11:57:08
controller debug message: INFO MESSAGE 18: Negative peak detected:
46.5, estimated: 46.6. Previous cool estimator: 3.779, New cool
estimator: 3.779.
Aug 03 2016 12:41:43 controller debug message:
INFO MESSAGE 18: Negative peak detected: 46.8, estimated: 47.0.
Previous cool estimator: 3.779, New cool estimator: 3.779.
Aug 03
2016 13:23:12 controller debug message: INFO MESSAGE 18: Negative peak
detected: 47.0, estimated: 47.0. Previous cool estimator: 3.779, New
cool estimator: 3.779.
Aug 03 2016 14:06:12 controller debug
message: INFO MESSAGE 18: Negative peak detected: 46.6, estimated:
46.8. Previous cool estimator: 3.779, New cool estimator: 3.779.
Aug 03 2016 14:50:32 controller debug message: INFO MESSAGE 18:
Negative peak detected: 46.9, estimated: 47.1. Previous cool
estimator: 3.779, New cool estimator: 3.779.
Aug 03 2016 15:35:04
controller debug message: INFO MESSAGE 18: Negative peak detected:
47.0, estimated: 47.2. Previous cool estimator: 3.779, New cool
estimator: 3.779.
Aug 03 2016 16:18:55 controller debug message:
INFO MESSAGE 18: Negative peak detected: 46.7, estimated: 46.8.
Previous cool estimator: 3.779, New cool estimator: 3.779.
BrewPi: wifiChecker: Attempt 1 to reach 192.168.0.1 failed (Wed Aug 3 16:30:12 MDT 2016)
Aug 03 2016 17:01:33 controller debug message: INFO MESSAGE 18:
Negative peak detected: 46.7, estimated: 46.5. Previous cool
estimator: 3.779, New cool estimator: 3.779.
Aug 03 2016 17:45:02
controller debug message: INFO MESSAGE 18: Negative peak detected:
46.7, estimated: 46.8. Previous cool estimator: 3.779, New cool
estimator: 3.779.
Aug 03 2016 18:27:38 controller debug message:
INFO MESSAGE 18: Negative peak detected: 46.4, estimated: 46.5.
Previous cool estimator: 3.779, New cool estimator: 3.779.
Aug 03
2016 19:09:26 controller debug message: INFO MESSAGE 18: Negative peak
detected: 46.7, estimated: 46.6. Previous cool estimator: 3.779, New
cool estimator: 3.779.
Aug 03 2016 19:51:16 controller debug
message: INFO MESSAGE 18: Negative peak detected: 46.5, estimated:
46.7. Previous cool estimator: 3.779, New cool estimator: 3.779.
Aug 03 2016 20:33:48 controller debug message: INFO MESSAGE 18:
Negative peak detected: 46.5, estimated: 46.5. Previous cool
estimator: 3.779, New cool estimator: 3.779.
BrewPi: wifiChecker: Attempt 1 to reach 192.168.0.1 failed (Wed Aug 3 20:40:11 MDT 2016)
Aug 03 2016 21:15:43 controller debug message: INFO MESSAGE 18:
Negative peak detected: 46.9, estimated: 46.8. Previous cool
estimator: 3.779, New cool estimator: 3.779.
Aug 03 2016 21:56:07
controller debug message: INFO MESSAGE 18: Negative peak detected:
46.5, estimated: 46.4. Previous cool estimator: 3.779, New cool
estimator: 3.779.
Aug 03 2016 22:39:29 controller debug message:
INFO MESSAGE 18: Negative peak detected: 46.6, estimated: 46.6.
Previous cool estimator: 3.779, New cool estimator: 3.779.
Aug 03
2016 23:21:04 controller debug message: INFO MESSAGE 18: Negative peak
detected: 46.8, estimated: 46.8. Previous cool estimator: 3.779, New
cool estimator: 3.779.
Aug 04 2016 00:00:00 Notification: New day, creating new JSON file.
Aug 04 2016 00:03:52 controller debug message: INFO MESSAGE 18:
Negative peak detected: 46.5, estimated: 46.6. Previous cool
estimator: 3.779, New cool estimator: 3.779.
Aug 04 2016 00:46:40
controller debug message: INFO MESSAGE 18: Negative peak detected:
46.5, estimated: 46.4. Previous cool estimator: 3.779, New cool
estimator: 3.779.
Aug 04 2016 01:34:30 controller debug message:
INFO MESSAGE 18: Negative peak detected: 46.4, estimated: 46.4.
Previous cool estimator: 3.779, New cool estimator: 3.779.
Aug 04
2016 02:19:35 controller debug message: INFO MESSAGE 18: Negative peak
detected: 46.6, estimated: 46.5. Previous cool estimator: 3.779, New
cool estimator: 3.779.
Aug 04 2016 03:03:56 controller debug
message: INFO MESSAGE 18: Negative peak detected: 46.8, estimated:
46.8. Previous cool estimator: 3.779, New cool estimator: 3.779.
Aug 04 2016 03:49:42 controller debug message: INFO MESSAGE 18:
Negative peak detected: 46.6, estimated: 46.7. Previous cool
estimator: 3.779, New cool estimator: 3.779.
Aug 04 2016 04:33:15
controller debug message: INFO MESSAGE 18: Negative peak detected:
46.7, estimated: 46.6. Previous cool estimator: 3.779, New cool
estimator: 3.779.
Aug 04 2016 05:16:01 controller debug message:
INFO MESSAGE 18: Negative peak detected: 47.1, estimated: 47.2.
Previous cool estimator: 3.779, New cool estimator: 3.779.
Aug 04
2016 05:59:36 controller debug message: INFO MESSAGE 18: Negative peak
detected: 46.8, estimated: 47.0. Previous cool estimator: 3.779, New
cool estimator: 3.779.
BrewPi: wifiChecker: Attempt 1 to reach 192.168.0.1 failed (Thu Aug 4 06:00:11 MDT 2016)
Aug 04 2016 06:43:33 controller debug message: INFO MESSAGE 18:
Negative peak detected: 46.5, estimated: 46.8. Previous cool
estimator: 3.779, New cool estimator: 3.779.
Aug 04 2016 07:28:37
controller debug message: INFO MESSAGE 18: Negative peak detected:
46.9, estimated: 47.0. Previous cool estimator: 3.779, New cool
estimator: 3.779.
Aug 04 2016 08:11:51 controller debug message:
INFO MESSAGE 18: Negative peak detected: 46.5, estimated: 46.8.
Previous cool estimator: 3.779, New cool estimator: 3.779.
Aug 04
2016 08:54:25 controller debug message: INFO MESSAGE 18: Negative peak
detected: 46.7, estimated: 46.7. Previous cool estimator: 3.779, New
cool estimator: 3.779.
Aug 04 2016 09:36:42 controller debug
message: INFO MESSAGE 18: Negative peak detected: 46.9, estimated:
46.9. Previous cool estimator: 3.779, New cool estimator: 3.779.
Aug 04 2016 10:22:34 controller debug message: INFO MESSAGE 18:
Negative peak detected: 46.5, estimated: 46.4. Previous cool
estimator: 3.779, New cool estimator: 3.779.
Aug 04 2016 11:06:12
controller debug message: INFO MESSAGE 18: Negative peak detected:
46.6, estimated: 46.8. Previous cool estimator: 3.779, New cool
estimator: 3.779.
Aug 04 2016 11:49:09 controller debug message:
INFO MESSAGE 18: Negative peak detected: 46.7, estimated: 46.7.
Previous cool estimator: 3.779, New cool estimator: 3.779.
Aug 04
2016 12:33:42 controller debug message: INFO MESSAGE 18: Negative peak
detected: 46.7, estimated: 46.8. Previous cool estimator: 3.779, New
cool estimator: 3.779.
Aug 04 2016 13:17:16 controller debug
message: INFO MESSAGE 18: Negative peak detected: 46.5, estimated:
46.6. Previous cool estimator: 3.779, New cool estimator: 3.779.
Aug 04 2016 14:01:13 controller debug message: INFO MESSAGE 18:
Negative peak detected: 46.6, estimated: 46.7. Previous cool
estimator: 3.779, New cool estimator: 3.779.
Aug 04 2016 14:43:54
controller debug message: INFO MESSAGE 18: Negative peak detected:
46.7, estimated: 46.8. Previous cool estimator: 3.779, New cool
estimator: 3.779.
Aug 04 2016 15:29:29 controller debug message:
INFO MESSAGE 18: Negative peak detected: 46.5, estimated: 46.7.
Previous cool estimator: 3.779, New cool estimator: 3.779.
Aug 04
2016 16:18:06 controller debug message: INFO MESSAGE 18: Negative peak
detected: 46.4, estimated: 46.6. Previous cool estimator: 3.779, New
cool estimator: 3.779.
Aug 04 2016 17:02:50 controller debug
message: INFO MESSAGE 18: Negative peak detected: 46.9, estimated:
47.0. Previous cool estimator: 3.779, New cool estimator: 3.779.
Aug 04 2016 17:48:26 controller debug message: INFO MESSAGE 18:
Negative peak detected: 46.8, estimated: 46.8. Previous cool
estimator: 3.779, New cool estimator: 3.779.
Aug 04 2016 18:15:34 Notification: Script started for beer 'Oktoberfest Lager schedule'
Aug 04 2016 18:15:44 Checking software version on controller...
Aug 04 2016 18:15:44 Found BrewPi v0.2.4, running commit 00000000,
running on an Arduino Uno with a revC shield on port /dev/ttyACM0
Aug 04 2016 18:42:25 controller debug message: INFO MESSAGE 18:
Negative peak detected: 46.5, estimated: 46.4. Previous cool
estimator: 3.779, New cool estimator: 3.779.
Aug 04 2016 19:23:15
controller debug message: INFO MESSAGE 18: Negative peak detected:
46.5, estimated: 46.5. Previous cool estimator: 3.779, New cool
estimator: 3.779.
Aug 04 2016 20:05:21 controller debug message:
INFO MESSAGE 18: Negative peak detected: 46.4, estimated: 46.3.
Previous cool estimator: 3.779, New cool estimator: 3.779.
Aug 04
2016 20:47:35 controller debug message: INFO MESSAGE 18: Negative peak
detected: 46.5, estimated: 46.5. Previous cool estimator: 3.779, New
cool estimator: 3.779.
Aug 04 2016 21:29:41 controller debug
message: INFO MESSAGE 18: Negative peak detected: 46.7, estimated:
46.7. Previous cool estimator: 3.779, New cool estimator: 3.779.
Aug 04 2016 22:12:08 controller debug message: INFO MESSAGE 18:
Negative peak detected: 46.8, estimated: 46.8. Previous cool
estimator: 3.779, New cool estimator: 3.779.
BrewPi: wifiChecker: Attempt 1 to reach 192.168.0.1 failed (Thu Aug 4 22:50:11 MDT 2016)
Aug 04 2016 22:56:07 controller debug message: INFO MESSAGE 18:
Negative peak detected: 46.6, estimated: 46.7. Previous cool
estimator: 3.779, New cool estimator: 3.779.
BrewPi: wifiChecker: Attempt 1 to reach 192.168.0.1 failed (Thu Aug 4 23:00:12 MDT 2016)
Aug 04 2016 23:38:08 controller debug message: INFO MESSAGE 18:
Negative peak detected: 47.0, estimated: 47.1. Previous cool
estimator: 3.779, New cool estimator: 3.779.
Aug 05 2016 00:00:00 Notification: New day, creating new JSON file.
Aug 05 2016 00:21:08 controller debug message: INFO MESSAGE 18:
Negative peak detected: 46.7, estimated: 46.8. Previous cool
estimator: 3.779, New cool estimator: 3.779.
Aug 05 2016 01:06:54
controller debug message: INFO MESSAGE 18: Negative peak detected:
46.7, estimated: 46.8. Previous cool estimator: 3.779, New cool
estimator: 3.779.
Aug 05 2016 01:51:03 controller debug message:
INFO MESSAGE 18: Negative peak detected: 46.7, estimated: 46.8.
Previous cool estimator: 3.779, New cool estimator: 3.779.
Aug 05
2016 02:36:41 controller debug message: INFO MESSAGE 18: Negative peak
detected: 46.8, estimated: 47.1. Previous cool estimator: 3.779, New
cool estimator: 3.779.
Aug 05 2016 03:20:12 controller debug
message: INFO MESSAGE 18: Negative peak detected: 47.1, estimated:
47.1. Previous cool estimator: 3.779, New cool estimator: 3.779.
BrewPi: wifiChecker: Attempt 1 to reach 192.168.0.1 failed (Fri Aug 5 04:00:11 MDT 2016)
Aug 05 2016 04:04:25 controller debug message: INFO MESSAGE 18:
Negative peak detected: 46.6, estimated: 47.0. Previous cool
estimator: 3.779, New cool estimator: 3.779.
Aug 05 2016 04:49:32
controller debug message: INFO MESSAGE 18: Negative peak detected:
46.7, estimated: 47.1. Previous cool estimator: 3.779, New cool
estimator: 3.779.
Aug 05 2016 05:35:22 controller debug message:
INFO MESSAGE 18: Negative peak detected: 46.6, estimated: 46.8.
Previous cool estimator: 3.779, New cool estimator: 3.779.
BrewPi: wifiChecker: Attempt 1 to reach 192.168.0.1 failed (Fri Aug 5 06:00:11 MDT 2016)
Aug 05 2016 06:22:04 controller debug message: INFO MESSAGE 18:
Negative peak detected: 46.5, estimated: 46.8. Previous cool
estimator: 3.779, New cool estimator: 3.779.
Aug 05 2016 07:08:26
controller debug message: INFO MESSAGE 18: Negative peak detected:
46.5, estimated: 46.8. Previous cool estimator: 3.779, New cool
estimator: 3.779.
Aug 05 2016 07:53:55 controller debug message:
INFO MESSAGE 18: Negative peak detected: 46.9, estimated: 47.1.
Previous cool estimator: 3.779, New cool estimator: 3.779.
Aug 05
2016 08:37:12 controller debug message: INFO MESSAGE 18: Negative peak
detected: 46.7, estimated: 47.0. Previous cool estimator: 3.779, New
cool estimator: 3.779.
Aug 05 2016 09:21:27 controller debug
message: INFO MESSAGE 18: Negative peak detected: 46.9, estimated:
47.1. Previous cool estimator: 3.779, New cool estimator: 3.779.
Aug 05 2016 10:05:12 controller debug message: INFO MESSAGE 18:
Negative peak detected: 46.7, estimated: 47.0. Previous cool
estimator: 3.779, New cool estimator: 3.779.
Aug 05 2016 10:50:55
controller debug message: INFO MESSAGE 18: Negative peak detected:
46.8, estimated: 46.8. Previous cool estimator: 3.779, New cool
estimator: 3.779.
Aug 05 2016 11:35:48 controller debug message:
INFO MESSAGE 18: Negative peak detected: 46.7, estimated: 46.9.
Previous cool estimator: 3.779, New cool estimator: 3.779.
Aug 05
2016 12:19:25 controller debug message: INFO MESSAGE 18: Negative peak
detected: 46.8, estimated: 46.9. Previous cool estimator: 3.779, New
cool estimator: 3.779.
Aug 05 2016 13:06:27 controller debug
message: INFO MESSAGE 18: Negative peak detected: 46.6, estimated:
46.8. Previous cool estimator: 3.779, New cool estimator: 3.779.
Aug 05 2016 13:51:37 controller debug message: INFO MESSAGE 18:
Negative peak detected: 46.7, estimated: 47.0. Previous cool
estimator: 3.779, New cool estimator: 3.779.
Aug 06 2016 00:00:00 Notification: New day, creating new JSON file.
BrewPi: wifiChecker: Attempt 1 to reach 192.168.0.1 failed (Sat Aug 6 00:00:12 MDT 2016)
BrewPi: wifiChecker: Attempt 1 to reach 192.168.0.1 failed (Sat Aug 6 00:10:11 MDT 2016)
BrewPi: wifiChecker: Attempt 1 to reach 192.168.0.1 failed (Sat Aug 6 07:20:12 MDT 2016)
BrewPi: wifiChecker: Attempt 1 to reach 192.168.0.1 failed (Sat Aug 6 18:20:12 MDT 2016)
Aug 06 2016 21:15:37 Notification: Script started for beer 'Oktoberfest Lager schedule'
Aug 06 2016 21:15:47 Checking software version on controller...
Aug 06 2016 21:15:47 Found BrewPi v0.2.4, running commit 00000000,
running on an Arduino Uno with a revC shield on port /dev/ttyACM0
Aug 06 2016 21:17:28 Setting profile 'Lager%20schedule%20S23' as active profile
Aug 06 2016 21:17:28 Notification: Profile mode enabled
Aug 06 2016 21:17:29 controller debug message: INFO MESSAGE 12: Received new setting: mode = p
Aug 06 2016 21:19:20 Setting profile 'Lager%20schedule%20S23' as active profile
Aug 06 2016 21:19:20 Notification: Profile mode enabled
Aug 06 2016 21:19:20 controller debug message: INFO MESSAGE 12: Received new setting: mode = p
Aug 06 2016 21:19:20 controller debug message: INFO MESSAGE 12: Received new setting: beerSet = 58.86
Aug 06 2016 21:19:44 controller debug message: INFO MESSAGE 12: Received new setting: beerSet = 58.87
Aug 06 2016 21:21:47 controller debug message: INFO MESSAGE 12: Received new setting: beerSet = 58.88
Aug 06 2016 21:23:00 Setting profile 'Lager%20schedule%20S23' as active profile
Aug 06 2016 21:23:00 Notification: Profile mode enabled
Aug 06 2016 21:23:01 controller debug message: INFO MESSAGE 12: Received new setting: mode = p
Aug 06 2016 21:23:01 controller debug message: INFO MESSAGE 12: Received new setting: beerSet = 48.0
Aug 07 2016 00:00:00 Notification: New day, creating new JSON file.
BrewPi: wifiChecker: Attempt 1 to reach 192.168.0.1 failed (Sun Aug 7 00:00:12 MDT 2016)
Aug 07 2016 02:01:39 controller debug message: INFO MESSAGE 18:
Negative peak detected: 35.7, estimated: 33.5. Previous cool
estimator: 3.779, New cool estimator: 3.004.
BrewPi: wifiChecker: Attempt 1 to reach 192.168.0.1 failed (Sun Aug 7 06:30:11 MDT 2016)
Aug 07 2016 13:02:44 Notification: Script started for beer 'Oktoberfest Lager schedule'
Aug 07 2016 13:02:54 Checking software version on controller...
Aug 07 2016 13:02:54 Found BrewPi v0.2.4, running commit 00000000,
running on an Arduino Uno with a revC shield on port /dev/ttyACM0