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solamylsolamyl
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switch time delay, diagnostic screen
- time delay for switch is now working - controling the switch is now in new separate file - new diagnostic screen added including the tests for gps, rtc and eeprom - milliseconds removed from printDelay() due to use for uptime counter - precision parameter changed semantics in printDate...() functions - some optimizations for smaller code size
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12 files changed

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lines changed

‎README.md‎

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Original file line numberDiff line numberDiff line change
@@ -5,9 +5,9 @@ depending on sunset/sunrise at actual geo position. With GPS and RTC.
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## Hardware used
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* Arduino Nano
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* GPS module NEO-6M
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* RTC module DS3231 with eeprom AT24C32
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* RTC module DS3231 with EEPROM AT24C32
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* LCD display 20x4 LCD2004A
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* some pushbuttons, cables, etc.
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* some pushbuttons, relay, wires, etc.
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## Libraries used
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* TinyGPSPlus

‎SolarTimer.ino‎

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Original file line numberDiff line numberDiff line change
@@ -1,7 +1,15 @@
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/*
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* This file is only here to make the Arduino IDE happy.
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* Please continue to "src/main.cpp" where are setup() and loop().
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*
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* SolarTimer
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* Timer switch for Arduino (fits Arduino Nano) that turns night lights
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* (like street lamps or decorative lighting) on/off depending on sunset/sunrise
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* at actual geo position. With GPS and RTC.
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*
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* Copyright (C) 2025 by Štěpán Škrob. Licensed under GNU GPL v3.0 license.
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* https://github.com/solamyl/SolarTimer
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*/
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// version string, at least this file has some use...
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const char * appVersion = "SolarTimer v1.1.1";
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const char * appVersion = "SolarTimer v1.2.0";

‎docs/notes.txt‎

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Original file line numberDiff line numberDiff line change
@@ -0,0 +1,284 @@
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global variables memory occupation:
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====================================
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-- main.cpp --
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sizeof(gps)=173
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sizeof(ss)=31
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sizeof(rtc)=24
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sizeof(eeprom)=10
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sizeof(lcd)=27
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sizeof(buttonSelect)=10
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sizeof(buttonPlus)=21
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sizeof(buttonMinus)=21
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sizeof(detectReset)=9
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sizeof(uptimeSecs)=4
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= 330 bytes
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Sketch uses 27810 bytes (90%) of program storage space. Maximum is 30720 bytes.
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Global variables use 1846 bytes (90%) of dynamic memory, leaving 202 bytes for local variables. Maximum is 2048 bytes.
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*** memory overflow!! ***
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-- config.cpp + DateTime.cpp + display.cpp --
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sizeof(config)=18
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sizeof(DateTime::daysInMonth)=12
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sizeof(backlightTS)=4
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sizeof(backlightOn)=1
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sizeof(refreshScreen)=1
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sizeof(selectScreen)=2
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= 38 bytes
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Sketch uses 27708 bytes (90%) of program storage space. Maximum is 30720 bytes.
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Global variables use 1808 bytes (88%) of dynamic memory, leaving 240 bytes for local variables. Maximum is 2048 bytes.
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*** memory looks sufficient ***
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-- gps.cpp --
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sizeof(rtcSetTS)=4
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sizeof(positionSetTS)=4
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sizeof(sunsetCalcTS)=4
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sizeof(sunsetTimeLocal)=6
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sizeof(sunriseTimeLocal)=6
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sizeof(switchOnTimeUtc)=6
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sizeof(switchOnTimeLocal)=6
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sizeof(switchOffTimeUtc)=6
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sizeof(switchOffTimeLocal)=6
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sizeof(TZ_offset)=4
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sizeof(DST_offset)=4
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= 56 bytes
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Sketch uses 27914 bytes (90%) of program storage space. Maximum is 30720 bytes.
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Global variables use 1934 bytes (94%) of dynamic memory, leaving 114 bytes for local variables. Maximum is 2048 bytes.
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*** memory overflow!! ***
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-- switch.cpp --
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sizeof(currentSwitchState)=1
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sizeof(newSwitchState)=1
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sizeof(switchDelayStartTS)=4
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= 6 bytes
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Sketch uses 27606 bytes (89%) of program storage space. Maximum is 30720 bytes.
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Global variables use 1754 bytes (85%) of dynamic memory, leaving 294 bytes for local variables. Maximum is 2048 bytes.
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*** memory looks sufficient ***
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total in global vars = 430 bytes
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GPS runtime stats:
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====================
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GPS OK speed 9600
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Sats HDOP Latitude Longitude Fix Date Time Date Alt Course Speed Card Distance Course Card Chars Sentences Checksum
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(deg) (deg) Age Age (m) --- from GPS ---- ---- to London ---- RX RX Fail
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----------------------------------------------------------------------------------------------------------------------------------------
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**** ***** ********** *********** **** 01/03/2026 17:45:47 29 ****** ****** ***** *** ******** ****** *** 145 0 1
70+
0 100.0 ********** *********** **** 01/03/2026 17:45:48 166 ****** ****** ***** *** ******** ****** *** 619 0 1
71+
0 100.0 ********** *********** **** 01/03/2026 17:45:49 252 ****** ****** ***** *** ******** ****** *** 1097 0 1
72+
0 100.0 ********** *********** **** 01/03/2026 17:45:50 333 ****** ****** ***** *** ******** ****** *** 1561 0 1
73+
0 100.0 ********** *********** **** 01/03/2026 17:45:51 376 ****** ****** ***** *** ******** ****** *** 1955 0 1
74+
0 100.0 ********** *********** **** 01/03/2026 17:45:52 382 ****** ****** ***** *** ******** ****** *** 2349 0 1
75+
0 100.0 ********** *********** **** 01/03/2026 17:45:53 383 ****** ****** ***** *** ******** ****** *** 2743 0 1
76+
0 100.0 ********** *********** **** 01/03/2026 17:45:54 391 ****** ****** ***** *** ******** ****** *** 3137 0 1
77+
0 100.0 ********** *********** **** 01/03/2026 17:45:55 397 ****** ****** ***** *** ******** ****** *** 3531 0 1
78+
0 100.0 ********** *********** **** 01/03/2026 17:45:56 407 ****** ****** ***** *** ******** ****** *** 3925 0 1
79+
0 100.0 ********** *********** **** 01/03/2026 17:45:57 414 ****** ****** ***** *** ******** ****** *** 4319 0 1
80+
0 100.0 ********** *********** **** 01/03/2026 17:45:58 421 ****** ****** ***** *** ******** ****** *** 4713 0 1
81+
0 100.0 ********** *********** **** 01/03/2026 17:45:59 426 ****** ****** ***** *** ******** ****** *** 5107 0 1
82+
0 100.0 ********** *********** **** 01/03/2026 17:46:00 435 ****** ****** ***** *** ******** ****** *** 5501 0 1
83+
0 100.0 ********** *********** **** 01/03/2026 17:46:01 443 ****** ****** ***** *** ******** ****** *** 5895 0 1
84+
0 100.0 ********** *********** **** 01/03/2026 17:46:02 448 ****** ****** ***** *** ******** ****** *** 6289 0 1
85+
0 100.0 ********** *********** **** 01/03/2026 17:46:03 457 ****** ****** ***** *** ******** ****** *** 6683 0 1
86+
0 100.0 ********** *********** **** 01/03/2026 17:46:04 464 ****** ****** ***** *** ******** ****** *** 7077 0 1
87+
0 100.0 ********** *********** **** 01/03/2026 17:46:05 471 ****** ****** ***** *** ******** ****** *** 7471 0 1
88+
0 100.0 ********** *********** **** 01/03/2026 17:46:06 479 ****** ****** ***** *** ******** ****** *** 7865 0 1
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3 6.7 ********** *********** **** 01/03/2026 17:59:54 199 ****** ****** ***** *** ******** ****** *** 25352 0 0
90+
3 6.7 ********** *********** **** 01/03/2026 17:59:55 282 ****** ****** ***** *** ******** ****** *** 25396 0 0
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3 6.7 ********** *********** **** 01/03/2026 17:59:56 339 ****** ****** ***** *** ******** ****** *** 25434 0 0
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3 6.7 ********** *********** **** 01/03/2026 17:59:57 347 ****** ****** ***** *** ******** ****** *** 25470 0 0
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3 6.7 50.007389 14.582209 245 01/03/2026 17:59:58 372 288.50 0.00 7.19 N 1046 284.82 WNW 25517 2 0
94+
3 6.7 50.007396 14.582252 302 01/03/2026 17:59:59 417 288.50 0.00 3.11 N 1046 284.82 WNW 25563 4 0
95+
3 6.7 50.007400 14.582280 312 01/03/2026 18:00:00 428 288.50 0.00 2.07 N 1046 284.82 WNW 25609 6 0
96+
3 6.7 50.007396 14.582283 322 01/03/2026 18:00:01 437 288.50 0.00 1.22 N 1046 284.82 WNW 25656 8 0
97+
3 6.7 50.007400 14.582310 331 01/03/2026 18:00:02 447 288.50 0.00 3.82 N 1046 284.82 WNW 25702 10 0
98+
3 6.7 50.007404 14.582242 344 01/03/2026 18:00:03 458 288.50 0.00 2.20 N 1046 284.82 WNW 25749 12 0
99+
3 6.7 50.007404 14.582286 351 01/03/2026 18:00:04 467 288.50 0.00 4.13 N 1046 284.82 WNW 25795 14 0
100+
3 6.7 50.007408 14.582276 361 01/03/2026 18:00:05 477 288.50 0.00 2.28 N 1046 284.82 WNW 25841 16 0
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charsProcessed=1954
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sentencesWithFix=2
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failedChecksum=6
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passedChecksum=21
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charsProcessed=3575
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sentencesWithFix=18
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failedChecksum=0
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passedChecksum=59
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--------------
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GPS wrong serial speed 4800
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Sats HDOP Latitude Longitude Fix Date Time Date Alt Course Speed Card Distance Course Card Chars Sentences Checksum
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(deg) (deg) Age Age (m) --- from GPS ---- ---- to London ---- RX RX Fail
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----------------------------------------------------------------------------------------------------------------------------------------
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**** ***** ********** *********** **** ********** ******** **** ****** ****** ***** *** ******** ****** *** 0 0 0
120+
**** ***** ********** *********** **** ********** ******** **** ****** ****** ***** *** ******** ****** *** 198 0 22
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**** ***** ********** *********** **** ********** ******** **** ****** ****** ***** *** ******** ****** *** 396 0 43
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**** ***** ********** *********** **** ********** ******** **** ****** ****** ***** *** ******** ****** *** 709 0 76
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**** ***** ********** *********** **** ********** ******** **** ****** ****** ***** *** ******** ****** *** 990 0 106
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**** ***** ********** *********** **** ********** ******** **** ****** ****** ***** *** ******** ****** *** 1188 0 126
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**** ***** ********** *********** **** ********** ******** **** ****** ****** ***** *** ******** ****** *** 1386 0 146
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**** ***** ********** *********** **** ********** ******** **** ****** ****** ***** *** ******** ****** *** 1658 0 172
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**** ***** ********** *********** **** ********** ******** **** ****** ****** ***** *** ******** ****** *** 1980 0 207
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**** ***** ********** *********** **** ********** ******** **** ****** ****** ***** *** ******** ****** *** 2178 0 228
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**** ***** ********** *********** **** ********** ******** **** ****** ****** ***** *** ******** ****** *** 2376 0 249
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**** ***** ********** *********** **** ********** ******** **** ****** ****** ***** *** ******** ****** *** 2606 0 271
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**** ***** ********** *********** **** ********** ******** **** ****** ****** ***** *** ******** ****** *** 2970 0 312
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**** ***** ********** *********** **** ********** ******** **** ****** ****** ***** *** ******** ****** *** 3168 0 332
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**** ***** ********** *********** **** ********** ******** **** ****** ****** ***** *** ******** ****** *** 3366 0 352
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charsProcessed=2207
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sentencesWithFix=0
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failedChecksum=303
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passedChecksum=0
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charsProcessed=2653
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sentencesWithFix=0
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failedChecksum=358
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passedChecksum=1
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--------------
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GPS wrong speed 2400
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Sats HDOP Latitude Longitude Fix Date Time Date Alt Course Speed Card Distance Course Card Chars Sentences Checksum
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(deg) (deg) Age Age (m) --- from GPS ---- ---- to London ---- RX RX Fail
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----------------------------------------------------------------------------------------------------------------------------------------
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**** ***** ********** *********** **** ********** ******** **** ****** ****** ***** *** ******** ****** *** 0 0 0
153+
**** ***** ********** *********** **** ********** ******** **** ****** ****** ***** *** ******** ****** *** 200 0 0
154+
**** ***** ********** *********** **** ********** ******** **** ****** ****** ***** *** ******** ****** *** 300 0 0
155+
**** ***** ********** *********** **** ********** ******** **** ****** ****** ***** *** ******** ****** *** 500 0 0
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**** ***** ********** *********** **** ********** ******** **** ****** ****** ***** *** ******** ****** *** 600 0 0
157+
**** ***** ********** *********** **** ********** ******** **** ****** ****** ***** *** ******** ****** *** 700 0 0
158+
**** ***** ********** *********** **** ********** ******** **** ****** ****** ***** *** ******** ****** *** 900 0 0
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**** ***** ********** *********** **** ********** ******** **** ****** ****** ***** *** ******** ****** *** 1000 0 0
160+
**** ***** ********** *********** **** ********** ******** **** ****** ****** ***** *** ******** ****** *** 1200 0 0
161+
**** ***** ********** *********** **** ********** ******** **** ****** ****** ***** *** ******** ****** *** 1300 0 0
162+
**** ***** ********** *********** **** ********** ******** **** ****** ****** ***** *** ******** ****** *** 1416 0 0
163+
**** ***** ********** *********** **** ********** ******** **** ****** ****** ***** *** ******** ****** *** 1600 0 0
164+
**** ***** ********** *********** **** ********** ******** **** ****** ****** ***** *** ******** ****** *** 1700 0 0
165+
**** ***** ********** *********** **** ********** ******** **** ****** ****** ***** *** ******** ****** *** 1900 0 0
166+
**** ***** ********** *********** **** ********** ******** **** ****** ****** ***** *** ******** ****** *** 2000 0 0
167+
**** ***** ********** *********** **** ********** ******** **** ****** ****** ***** *** ******** ****** *** 2118 0 0
168+
**** ***** ********** *********** **** ********** ******** **** ****** ****** ***** *** ******** ****** *** 2300 0 0
169+
**** ***** ********** *********** **** ********** ******** **** ****** ****** ***** *** ******** ****** *** 2400 0 0
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charsProcessed=1356
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sentencesWithFix=0
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failedChecksum=0
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passedChecksum=0
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charsProcessed=1264
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sentencesWithFix=0
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failedChecksum=0
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passedChecksum=0
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--------------
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draft of screen designs:
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============================
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.........|.........|
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sila signalu 95%
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24.12.2024 14:35:02
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UTC+01:00 zimni cas
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pozice [50.0N] 14.6E
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.........|.........|
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zap/vych 17:01-08:15
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slunce [-3.1] stupnu
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sviceni 17:35-07:45
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zpozdeni [+20] sec
199+
.........|.........|
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TEST sviceni
201+
vypnuti za [5] min
202+
.........|.........|
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GPS pozice/cas FAIL
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RTC hodiny FAIL
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EEPROM config FAIL
207+
208+
209+
.........|.........|
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GPS (8) 50.1N 15.2E
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UTC 24.12.2024 00:35
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TZ +2:00
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214+
sun -5: 16:55-08:10
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ZAPNUTO TEST
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217+
218+
.........|.........|
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31.12.2024 08:58
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zapad 17:01-08:15
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slunce [-10] stupnu
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sviceni 17:35-07:45
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.........|.........|
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GPS sat 8 - dobry
225+
50.13484N 15.26454E
226+
UTC 24.12.2024 00:35
227+
TZ [+1:00] [zimni]
228+
.........|.........|
229+
31.12.2024 08:58
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TESTOVACI mod
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vypnuti za [5] min
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.........|.........|
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31.12.2024 08:58
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baterka - dobry
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posun zap [30] sec
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.........|.........|
237+
238+
239+
-----
240+
GPS 8 satelitu
241+
LOC 50.0075, 14.5820
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UTC 30.11.2025 01:36
243+
TZ +0100 evropa zima
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.........|.........|
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246+
247+
248+
TOTO VYPADA OK:
249+
250+
.........|.........|
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30.11.2025 01:36:30
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zap-vych 17:01-08:15
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sviceni 17:35-07:45
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slunce [-10] stupnu
255+
.........|.........|
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GPS 8 satelitu
257+
aktualni 50.00 14.58
258+
ulozeno 50.00 14.58
259+
[nechat ulozeny]
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[ulozit aktualni]
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.........|.........|
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serizeni pred 1 hod
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TZ evropa +0100 zima
264+
cas leto/zima [ano]
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posun spinac [+30s]
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.........|.........|
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268+
269+
270+
.........|.........|
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GPS 8 50.00,14.58
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30.11.2025 23:24:00
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zap-vych 17:01-08:15
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svic -10 17:35-07:45
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.........|.........|
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277+
.........|.........|
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GPS 100% 10 satelitu
279+
50.007625, 14.581941
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serizeni pred 6h
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posun spinace +0s
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.........|.........|
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slunce -2.0 stupnu
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