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--- public:watches:watchcheck [04/05/22 10:29 BST] – gm4slv
+++ public:watches:watchcheck [06/03/25 06:49 GMT] (current) – external edit 127.0.0.1
@@ Line 12: / Line 12: @@
 directory. the data from each measurement is stored in a **json** file in the same directory.
+++++ watchcheck.py |
 <file python watchcheck.py>
 #! /usr/bin/env python
@@ Line 212: / Line 212: @@
 </file>
+++++
 Running it for the first time, with no previous records stored, looks like this:
@@ Line 242: / Line 243: @@
 </code>
-I'll update this once I've done a second measurement, in a day or so....
+Running it again, after only 10 minutes looks like this:
+<code>
+Command > : n
+New
+Current Time = 10:30
+Watch time 10:30
+
+Press enter when seconds = 0
+/05/04 10:30:30
+Delta -30.2 seconds
+First record time  2022/05/04 10:19:30
+First record delta  -30.1799800396
+Previous record time  2022/05/04 10:19:30
+Previous record delta  -30.1799800396
+Latest record time  2022/05/04 10:30:30
+Latest record delta  -30.1998269558
+Overall elapsed time  0:11:00
+Latest elapsed time  0:11:00
+Latest delta change  -0.0198469161987
+Latest elapsed time 660 seconds
+Daily PPM : -30.071
+Daily rate error: -2.6 s/d
+Total Time 660 seconds
+Total error  -0.0198469161987
+Total PPM : -30.071
+Total rate error: -2.6 s/d
+========================================================
+ Delta : -30.2 s | Rate : -2.6 s/d | Average : -2.6 s/d
+========================================================
+</code>
+The ''error_list.json'' file now looks like:
+<code>
+[["2022/05/04 10:19:30", -30.179980039596558], ["2022/05/04 10:30:30", -30.199826955795288]]
+</code>
 There's also a small utility called ''watchstat.py'' that reads the ''error_list.json'' file to calculate and
 display the data
+++++ watchstat.py |
 <file python watchstat.py>
@@ Line 355: / Line 403: @@
 </file>
+++++
+Running watchstat.py on the newly updated ''error_list.json''
+<code>
+gm4slv@laptop:~/watchcheck_damasko $ python watchstat.py
+First record time  2022/05/04 10:19:30
+First record delta  -30.1799800396
+Previous record time  2022/05/04 10:19:30
+Previous record delta  -30.1799800396
+Latest record time  2022/05/04 10:30:30
+Latest record delta  -30.1998269558
+Overall elapsed time  0:11:00
+Latest elapsed time  0:11:00
+Latest delta change  -0.0198469161987
+Latest elapsed time 660 seconds
+Daily PPM : -30.071
+Daily rate error: -2.6 s/d
+Total Time 660 seconds
+Total error  -0.0198469161987
+Total PPM : -30.071
+Total rate error: -2.6 s/d
+========================================================
+ Delta : -30.2 s | Rate : -2.6 s/d | Average : -2.6 s/d
+========================================================
+</code>
+''watchcheck.py'' also creates a log file on each run.
+<code>
+/05/2022 09:30:30     -30.2           -2.6            -2.6
+</code>
+The fields are "date time", current error, error in seconds per day since last record, average error in seconds per day since the start.
+This mimics the behaviour of the Android Watchcheck app
+{{:public:watches:screenshot_20220504-104043.png?direct&400|}}
  //[[gm4slv@gm4slv.plus.com|John Pumford-Green]] Wed May  4 09:09:09 2022//