Setting date and time problem - Printable Version

Setting date and time problem - Printable Version

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+--- Thread: Setting date and time problem (/Thread-Setting-date-and-time-problem)

Pages: 1 2 3

RE: Setting date and time problem - jarekh3 - 10-09-2018

Cumulus log:

10.09.2018 01:42:40.054 : Firmware Version: 1.90
10.09.2018 01:42:40.054 : Discon period: 3
10.09.2018 01:42:40.054 : VP2: Setting station clock
10.09.2018 01:42:40.054 : y=2018 m=9 d=10 h=1 m=42
10.09.2018 01:42:41.828 : VP2: SetStationTime_V res = 0
10.09.2018 01:42:41.828 : VP2: Getting station clock
10.09.2018 01:42:42.405 : VP2: GetStationTime_V res = 0
10.09.2018 01:42:42.405 : y=2019 m=5 d=2 h=1 m=42
10.09.2018 01:42:42.405 : Loading last N hour data from data logs: 10.09.2018 01:41:01
10.09.2018 01:42:42.405 : Loaded 31 entries to last hour data list
10.09.2018 01:42:42.406 : Loaded 31 entries to last 3 hour data list
10.09.2018 01:42:42.407 : Loaded 31 entries to last 24 hour data list
10.09.2018 01:42:42.408 : Log file does not exist: C:\Cumulus\data\paź18log.txt
10.09.2018 01:42:42.408 : Log file does not exist: C:\Cumulus\data\lis18log.txt
10.09.2018 01:42:42.408 : Loaded 31 entries to recent data list

RE: Setting date and time problem - werk_ag - 10-09-2018

Is the RTC clock correctly detected by the I2C scanner utility?
Could you try running the system without connecting the ATM sensor?

RE: Setting date and time problem - jarekh3 - 10-09-2018

It's idea!!!! Idea

I'll check check when I get home.

RE: Setting date and time problem - jarekh3 - 10-09-2018

I removed BME280 - no results Angry

I2C Scanner:

Code:
-> Scanning...

49:42.852 -> I2C device found at address 0x50  !  <- Display

49:42.852 -> I2C device found at address 0x68  !  <- RTC DS3231

49:42.852 -> I2C device found at address 0x76  !  <- BME280

49:42.852 -> done

RE: Setting date and time problem - werk_ag - 10-09-2018

That's a very strange situation. Huh

If possible I suggest you to use the MultiSpeedI2CScanner.ino included on the software.

Or something is messing with the I2C communication, or the RTC modules are faulty.
It don't seems a problem in the I2C bus as the data from BME280 is read perfectly .

Just a small correction:

Code:
17:49:42.852 -> I2C device found at address 0x50  !  <- External EEPROM

RE: Setting date and time problem - jarekh3 - 10-09-2018

Hmm....

Multi Speed I2C Scanner:

Code:
TIME    DEC    HEX        50    100    200    300    400    [KHz]

26:09.859 -> --------------------------------------------------------------------------------

26:09.859 -> 51283    0    0x00        .    .    .    .    .

26:09.893 -> 51286    1    0x01        .    .    .    .    .

26:09.893 -> 51288    2    0x02        .    .    .    .    .

26:09.893 -> 51290    3    0x03        .    .    .    .    .

26:09.893 -> 51292    4    0x04        .    .    .    .    .

26:09.893 -> 51294    5    0x05        .    .    .    .    .

26:09.893 -> 51296    6    0x06        .    .    .    .    .

26:09.893 -> 51298    7    0x07        .    .    .    .    .

26:09.893 -> 51300    8    0x08        .    .    .    .    .

26:09.893 -> 51302    9    0x09        .    .    .    .    .

26:09.893 -> 51304    10    0x0A        .    .    .    .    .

26:09.893 -> 51306    11    0x0B        .    .    .    .    .

26:09.893 -> 51309    12    0x0C        .    .    .    .    .

26:09.893 -> 51311    13    0x0D        .    .    .    .    .

26:09.893 -> 51313    14    0x0E        .    .    .    .    .

26:09.893 -> 51315    15    0x0F        .    .    .    .    .

26:09.893 -> 51317    16    0x10        .    .    .    .    .

26:09.893 -> 51319    17    0x11        .    .    .    .    .

26:09.927 -> 51322    18    0x12        .    .    .    .    .

26:09.927 -> 51324    19    0x13        .    .    .    .    .

26:09.927 -> 51326    20    0x14        .    .    .    .    .

26:09.927 -> 51329    21    0x15        .    .    .    .    .

26:09.927 -> 51331    22    0x16        .    .    .    .    .

26:09.927 -> 51333    23    0x17        .    .    .    .    .

26:09.927 -> 51336    24    0x18        .    .    .    .    .

26:09.927 -> 51338    25    0x19        .    .    .    .    .

26:09.927 -> 51340    26    0x1A        .    .    .    .    .

26:09.927 -> 51342    27    0x1B        .    .    .    .    .

26:09.927 -> 51344    28    0x1C        .    .    .    .    .

26:09.927 -> 51346    29    0x1D        .    .    .    .    .

26:09.927 -> 51348    30    0x1E        .    .    .    .    .

26:09.927 -> 51351    31    0x1F        .    .    .    .    .

26:09.927 -> 51353    32    0x20        .    .    .    .    .

26:09.960 -> 51355    33    0x21        .    .    .    .    .

26:09.960 -> 51357    34    0x22        .    .    .    .    .

26:09.960 -> 51359    35    0x23        .    .    .    .    .

26:09.960 -> 51361    36    0x24        .    .    .    .    .

26:09.960 -> 51364    37    0x25        .    .    .    .    .

26:09.960 -> 51366    38    0x26        .    .    .    .    .

26:09.960 -> 51368    39    0x27        .    .    .    .    .

26:09.960 -> 51371    40    0x28        .    .    .    .    .

26:09.960 -> 51373    41    0x29        .    .    .    .    .

26:09.960 -> 51375    42    0x2A        .    .    .    .    .

26:09.960 -> 51378    43    0x2B        .    .    .    .    .

26:09.960 -> 51380    44    0x2C        .    .    .    .    .

26:09.960 -> 51382    45    0x2D        .    .    .    .    .

26:09.960 -> 51384    46    0x2E        .    .    .    .    .

51386    47    0x2F        .    .    .    .    .

26:09.994 -> 51388    48    0x30        .    .    .    .    .

26:09.994 -> 51390    49    0x31        .    .    .    .    .

26:09.994 -> 51393    50    0x32        .    .    .    .    .

26:09.994 -> 51395    51    0x33        .    .    .    .    .

26:09.994 -> 51397    52    0x34        .    .    .    .    .

26:09.994 -> 51399    53    0x35        .    .    .    .    .

26:09.994 -> 51401    54    0x36        .    .    .    .    .

26:09.994 -> 51403    55    0x37        .    .    .    .    .

26:09.994 -> 51406    56    0x38        .    .    .    .    .

26:09.994 -> 51408    57    0x39        .    .    .    .    .

26:09.994 -> 51410    58    0x3A        .    .    .    .    .

26:09.994 -> 51412    59    0x3B        .    .    .    .    .

26:09.994 -> 51415    60    0x3C        .    .    .    .    .

26:09.994 -> 51417    61    0x3D        .    .    .    .    .

26:10.028 -> 51420    62    0x3E        .    .    .    .    .

26:10.028 -> 51422    63    0x3F        .    .    .    .    .

26:10.028 -> 51424    64    0x40        .    .    .    .    .

26:10.028 -> 51426    65    0x41        .    .    .    .    .

26:10.028 -> 51428    66    0x42        .    .    .    .    .

26:10.028 -> 51430    67    0x43        .    .    .    .    .

26:10.028 -> 51432    68    0x44        .    .    .    .    .

26:10.028 -> 51435    69    0x45        .    .    .    .    .

26:10.028 -> 51437    70    0x46        .    .    .    .    .

26:10.028 -> 51439    71    0x47        .    .    .    .    .

26:10.028 -> 51441    72    0x48        .    .    .    .    .

26:10.028 -> 51443    73    0x49        .    .    .    .    .

26:10.028 -> 51445    74    0x4A        .    .    .    .    .

26:10.028 -> 51448    75    0x4B        .    .    .    .    .

26:10.028 -> 51450    76    0x4C        .    .    .    .    .

26:10.028 -> 51452    77    0x4D        .    .    .    .    .

26:10.028 -> 51454    78    0x4E        .    .    .    .    .

26:10.062 -> 51457    79    0x4F        .    .    .    .    .

26:10.062 -> 51459    80    0x50        V    V    V    V    V

26:10.062 -> 51462    81    0x51        .    .    .    .    .

26:10.062 -> 51464    82    0x52        .    .    .    .    .

26:10.062 -> 51466    83    0x53        .    .    .    .    .

26:10.062 -> 51468    84    0x54        .    .    .    .    .

26:10.062 -> 51470    85    0x55        .    .    .    .    .

26:10.062 -> 51472    86    0x56        .    .    .    .    .

26:10.062 -> 51474    87    0x57        .    .    .    .    .

26:10.062 -> 51477    88    0x58        .    .    .    .    .

26:10.062 -> 51479    89    0x59        .    .    .    .    .

26:10.062 -> 51481    90    0x5A        .    .    .    .    .

26:10.062 -> 51483    91    0x5B        .    .    .    .    .

26:10.062 -> 51485    92    0x5C        .    .    .    .    .

26:10.062 -> 51487    93    0x5D        .    .    .    .    .

26:10.097 -> 51490    94    0x5E        .    .    .    .    .

26:10.097 -> 51492    95    0x5F        .    .    .    .    .

26:10.097 -> 51494    96    0x60        .    .    .    .    .

26:10.097 -> 51496    97    0x61        .    .    .    .    .

26:10.097 -> 51499    98    0x62        .    .    .    .    .

26:10.097 -> 51501    99    0x63        .    .    .    .    .

26:10.097 -> 51504    100    0x64        .    .    .    .    .

26:10.097 -> 51506    101    0x65        .    .    .    .    .

26:10.097 -> 51508    102    0x66        .    .    .    .    .

26:10.097 -> 51510    103    0x67        .    .    .    .    .

26:10.097 -> 51513    104    0x68        V    V    V    V    V

26:10.097 -> 51515    105    0x69        .    .    .    .    .

26:10.097 -> 51517    106    0x6A        .    .    .    .    .

26:10.097 -> 51519    107    0x6B        .    .    .    .    .

26:10.097 -> 51521    108    0x6C        .    .    .    .    .

26:10.097 -> 51524    109    0x6D        .    .    .    .    .

26:10.131 -> 51526    110    0x6E        .    .    .    .    .

26:10.131 -> 51528    111    0x6F        .    .    .    .    .

26:10.131 -> 51530    112    0x70        .    .    .    .    .

26:10.131 -> 51533    113    0x71        .    .    .    .    .

26:10.131 -> 51535    114    0x72        .    .    .    .    .

26:10.131 -> 51537    115    0x73        .    .    .    .    .

26:10.131 -> 51539    116    0x74        .    .    .    .    .

26:10.131 -> 51543    117    0x75        .    .    .    .    .

26:10.131 -> 51545    118    0x76        V    V    V    V    V

26:10.131 -> 51547    119    0x77        .    .    .    .    .

26:10.131 -> 51549    120    0x78        .    .    .    .    .

26:10.131 -> 51552    121    0x79        .    .    .    .    .

26:10.131 -> 51554    122    0x7A        .    .    .    .    .

26:10.131 -> 51556    123    0x7B        .    .    .    .    .

26:10.166 -> 51558    124    0x7C        .    .    .    .    .

26:10.166 -> 51561    125    0x7D        .    .    .    .    .

26:10.166 -> 51563    126    0x7E        .    .    .    .    .

26:10.166 -> 51565    127    0x7F        .    .    .    .    .

26:10.166 -> 

26:10.166 -> 3 devices found in 290 milliseconds.

26:10.166 ->

RE: Setting date and time problem - jarekh3 - 10-09-2018

(10-09-2018, 23:30)jarekh3 Wrote: Hmm....

Multi Speed I2C Scanner:

Code:
TIME DEC HEX 50 100 200 300 400 [KHz] 00:26:09.859 -> -------------------------------------------------------------------------------- 00:26:09.859 -> 51283 0 0x00 . . . . . 00:26:09.893 -> 51286 1 0x01 . . . . . 00:26:09.893 -> 51288 2 0x02 . . . . . 00:26:09.893 -> 51290 3 0x03 . . . . . 00:26:09.893 -> 51292 4 0x04 . . . . . 00:26:09.893 -> 51294 5 0x05 . . . . . 00:26:09.893 -> 51296 6 0x06 . . . . . 00:26:09.893 -> 51298 7 0x07 . . . . . 00:26:09.893 -> 51300 8 0x08 . . . . . 00:26:09.893 -> 51302 9 0x09 . . . . . 00:26:09.893 -> 51304 10 0x0A . . . . . 00:26:09.893 -> 51306 11 0x0B . . . . . 00:26:09.893 -> 51309 12 0x0C . . . . . 00:26:09.893 -> 51311 13 0x0D . . . . . 00:26:09.893 -> 51313 14 0x0E . . . . . 00:26:09.893 -> 51315 15 0x0F . . . . . 00:26:09.893 -> 51317 16 0x10 . . . . . 00:26:09.893 -> 51319 17 0x11 . . . . . 00:26:09.927 -> 51322 18 0x12 . . . . . 00:26:09.927 -> 51324 19 0x13 . . . . . 00:26:09.927 -> 51326 20 0x14 . . . . . 00:26:09.927 -> 51329 21 0x15 . . . . . 00:26:09.927 -> 51331 22 0x16 . . . . . 00:26:09.927 -> 51333 23 0x17 . . . . . 00:26:09.927 -> 51336 24 0x18 . . . . . 00:26:09.927 -> 51338 25 0x19 . . . . . 00:26:09.927 -> 51340 26 0x1A . . . . . 00:26:09.927 -> 51342 27 0x1B . . . . . 00:26:09.927 -> 51344 28 0x1C . . . . . 00:26:09.927 -> 51346 29 0x1D . . . . . 00:26:09.927 -> 51348 30 0x1E . . . . . 00:26:09.927 -> 51351 31 0x1F . . . . . 00:26:09.927 -> 51353 32 0x20 . . . . . 00:26:09.960 -> 51355 33 0x21 . . . . . 00:26:09.960 -> 51357 34 0x22 . . . . . 00:26:09.960 -> 51359 35 0x23 . . . . . 00:26:09.960 -> 51361 36 0x24 . . . . . 00:26:09.960 -> 51364 37 0x25 . . . . . 00:26:09.960 -> 51366 38 0x26 . . . . . 00:26:09.960 -> 51368 39 0x27 . . . . . 00:26:09.960 -> 51371 40 0x28 . . . . . 00:26:09.960 -> 51373 41 0x29 . . . . . 00:26:09.960 -> 51375 42 0x2A . . . . . 00:26:09.960 -> 51378 43 0x2B . . . . . 00:26:09.960 -> 51380 44 0x2C . . . . . 00:26:09.960 -> 51382 45 0x2D . . . . . 00:26:09.960 -> 51384 46 0x2E . . . . . 51386 47 0x2F . . . . . 00:26:09.994 -> 51388 48 0x30 . . . . . 00:26:09.994 -> 51390 49 0x31 . . . . . 00:26:09.994 -> 51393 50 0x32 . . . . . 00:26:09.994 -> 51395 51 0x33 . . . . . 00:26:09.994 -> 51397 52 0x34 . . . . . 00:26:09.994 -> 51399 53 0x35 . . . . . 00:26:09.994 -> 51401 54 0x36 . . . . . 00:26:09.994 -> 51403 55 0x37 . . . . . 00:26:09.994 -> 51406 56 0x38 . . . . . 00:26:09.994 -> 51408 57 0x39 . . . . . 00:26:09.994 -> 51410 58 0x3A . . . . . 00:26:09.994 -> 51412 59 0x3B . . . . . 00:26:09.994 -> 51415 60 0x3C . . . . . 00:26:09.994 -> 51417 61 0x3D . . . . . 00:26:10.028 -> 51420 62 0x3E . . . . . 00:26:10.028 -> 51422 63 0x3F . . . . . 00:26:10.028 -> 51424 64 0x40 . . . . . 00:26:10.028 -> 51426 65 0x41 . . . . . 00:26:10.028 -> 51428 66 0x42 . . . . . 00:26:10.028 -> 51430 67 0x43 . . . . . 00:26:10.028 -> 51432 68 0x44 . . . . . 00:26:10.028 -> 51435 69 0x45 . . . . . 00:26:10.028 -> 51437 70 0x46 . . . . . 00:26:10.028 -> 51439 71 0x47 . . . . . 00:26:10.028 -> 51441 72 0x48 . . . . . 00:26:10.028 -> 51443 73 0x49 . . . . . 00:26:10.028 -> 51445 74 0x4A . . . . . 00:26:10.028 -> 51448 75 0x4B . . . . . 00:26:10.028 -> 51450 76 0x4C . . . . . 00:26:10.028 -> 51452 77 0x4D . . . . . 00:26:10.028 -> 51454 78 0x4E . . . . . 00:26:10.062 -> 51457 79 0x4F . . . . . 00:26:10.062 -> 51459 80 0x50 V V V V V 00:26:10.062 -> 51462 81 0x51 . . . . . 00:26:10.062 -> 51464 82 0x52 . . . . . 00:26:10.062 -> 51466 83 0x53 . . . . . 00:26:10.062 -> 51468 84 0x54 . . . . . 00:26:10.062 -> 51470 85 0x55 . . . . . 00:26:10.062 -> 51472 86 0x56 . . . . . 00:26:10.062 -> 51474 87 0x57 . . . . . 00:26:10.062 -> 51477 88 0x58 . . . . . 00:26:10.062 -> 51479 89 0x59 . . . . . 00:26:10.062 -> 51481 90 0x5A . . . . . 00:26:10.062 -> 51483 91 0x5B . . . . . 00:26:10.062 -> 51485 92 0x5C . . . . . 00:26:10.062 -> 51487 93 0x5D . . . . . 00:26:10.097 -> 51490 94 0x5E . . . . . 00:26:10.097 -> 51492 95 0x5F . . . . . 00:26:10.097 -> 51494 96 0x60 . . . . . 00:26:10.097 -> 51496 97 0x61 . . . . . 00:26:10.097 -> 51499 98 0x62 . . . . . 00:26:10.097 -> 51501 99 0x63 . . . . . 00:26:10.097 -> 51504 100 0x64 . . . . . 00:26:10.097 -> 51506 101 0x65 . . . . . 00:26:10.097 -> 51508 102 0x66 . . . . . 00:26:10.097 -> 51510 103 0x67 . . . . . 00:26:10.097 -> 51513 104 0x68 V V V V V 00:26:10.097 -> 51515 105 0x69 . . . . . 00:26:10.097 -> 51517 106 0x6A . . . . . 00:26:10.097 -> 51519 107 0x6B . . . . . 00:26:10.097 -> 51521 108 0x6C . . . . . 00:26:10.097 -> 51524 109 0x6D . . . . . 00:26:10.131 -> 51526 110 0x6E . . . . . 00:26:10.131 -> 51528 111 0x6F . . . . . 00:26:10.131 -> 51530 112 0x70 . . . . . 00:26:10.131 -> 51533 113 0x71 . . . . . 00:26:10.131 -> 51535 114 0x72 . . . . . 00:26:10.131 -> 51537 115 0x73 . . . . . 00:26:10.131 -> 51539 116 0x74 . . . . . 00:26:10.131 -> 51543 117 0x75 . . . . . 00:26:10.131 -> 51545 118 0x76 V V V V V 00:26:10.131 -> 51547 119 0x77 . . . . . 00:26:10.131 -> 51549 120 0x78 . . . . . 00:26:10.131 -> 51552 121 0x79 . . . . . 00:26:10.131 -> 51554 122 0x7A . . . . . 00:26:10.131 -> 51556 123 0x7B . . . . . 00:26:10.166 -> 51558 124 0x7C . . . . . 00:26:10.166 -> 51561 125 0x7D . . . . . 00:26:10.166 -> 51563 126 0x7E . . . . . 00:26:10.166 -> 51565 127 0x7F . . . . . 00:26:10.166 -> 00:26:10.166 -> 3 devices found in 290 milliseconds. 00:26:10.166 ->

Aaaa..... This is a message with an extended DS3231 (Without RTC):

Code:
ESP8266 FW Version: WIFI GOT IP

39:19.708 -> AT+GMR

39:19.708 -> AT version:1.3.0.0(Jul 14 2016 18:54:01)

39:19.743 -> SDK version:2.0.0(5a875ba)

39:19.743 -> Farylink Technology Co., Ltd. v1.0.0.2

39:19.778 -> May 11 2017 22:23:58

39:19.778 -> OK

Mode station OK

39:26.272 -> Multiple mux OK

Join AP success!

39:31.301 -> Connected to AP: AT+CWJAP?

39:31.301 -> +CWJAP:"morska1","e8:de:27:cd:52:35",6,-65

39:31.336 -> 

39:31.336 -> OK

39:31.336 -> 

39:31.336 -> IP Address: 192.168.1.116

39:31.370 -> Broadcast IP: 192.168.1.255

39:31.370 -> Start tcp server OK

STATUS:2

39:31.439 -> Set tcp server timout 30 seconds

39:31.474 -> RTC current date: Apr 24 2018

39:31.474 -> RTC current time: 23:46:39

39:31.509 -> Sending NTP request to sync clock...

NTP replied

39:31.613 -> UTC time from NTP server: 22:39:29

39:31.613 -> RTC adjusted to local time: 23:39:29

WiFi connection is ON

RE: Setting date and time problem - werk_ag - 11-09-2018

Hi,

Quote:Aaaa..... This is a message with an extended DS3231 (Without RTC):

Sorry I don't understand what you mean, can you please explain it better...

Trying to guess... even if the RTC module isn't attached to the board, software always output some values here:

Quote:00:39:31.474 -> RTC current date: Apr 24 2018
00:39:31.474 -> RTC current time: 23:46:39

The software doesn't check or produce any error message in case the RTC module isn't present or not working.
We can discard any problem with RX software because it is working for many others, including myself. Whatever is happening its an hardware problem. My best bet is that the RTC modules are faulty.
Try to test them using a breadboard and a spare Arduino (or use the Nano installed on the TX unit).

RE: Setting date and time problem - jarekh3 - 11-09-2018

Exactly, I received this message after removing the RTC from the plate. (Plate without DS3231):

Code:
00:39:31.439 -> Set tcp server timout 30 seconds

00:39:31.474 -> RTC current date: Apr 24 2018

00:39:31.474 -> RTC current time: 23:46:39

00:39:31.509 -> Sending NTP request to sync clock...

NTP replied

00:39:31.613 -> UTC time from NTP server: 22:39:29

00:39:31.613 -> RTC adjusted to local time: 23:39:29

WiFi connection is ON

Well, I'm ordering another RTC.

RE: Setting date and time problem - jarekh3 - 17-09-2018

I am a happy owner of four modules DS3231 Smile

Each bought at different store. When you start the Weatherduino chip is set to the correct date and time by NTP (ignoring the hour shift (?))
but the displayed the date 8-04-2018.
This module when it is connected to another Arduino shows the correct date and time on LCD (e.g. 16-09-2018 21:45).
[Image: 9246329be9db.jpg]

When I connect Cumulus Weatherduino adjust correctly time only on the display (eliminates the hour offset) but the date is in the format e.g.. 222-05-2019 and the RTC when connected to the reference turns out to be reset and shows 01-01-2000 00:00.
Cumulus log:

Code:
09.2018 21:52:08.817 : Discon period: 3

09.2018 21:52:08.817 : VP2: Setting station clock

09.2018 21:52:08.817 : y=2018 m=9 d=16 h=21 m=52

09.2018 21:52:10.190 : VP2: SetStationTime_V res = 0

09.2018 21:52:10.190 : VP2: Getting station clock

09.2018 21:52:10.771 : VP2: GetStationTime_V res = 0

09.2018 21:52:10.771 : y=2019 m=5 d=8 h=21 m=52

09.2018 21:52:10.771 : Loading last N hour data from data logs: 16.09.2018 19:36:00

Sketch from RTClib library sets correctly DS3231 both on the WeatherDuino and reference the layout of the Arduino Mega.
I removed the BME280 and put SHT21 and its indication of T/H are also valid.
All this happens on a clean install of Weatherduino v. 7 and is independent of the settings of the longitude and latitude or time zone.

I do not understand why the program ignores my time zone settings.

Code:
TimeChangeRule PST = {"PST", Last, Sun, Mar, 1, 120};   //Portuguese Summer Time -  "UTC + 1" or GMT + 1

TimeChangeRule GMT = {"GMT", Last, Sun, Oct, 2, 60};    //Portuguese Winter Time -  "UTC + 0" or GMT 

Timezone myTZ(PST, GMT);

Slowly end to me ideas, replace the EEPROM, Meduino, whether to buy a fifth RTC?