From 37f2eae6fd14cca338015ddf7a50df0e3562c91f Mon Sep 17 00:00:00 2001
From: gregor herrmann <gregor@toastfreeware.priv.at>
Date: Sun, 22 Sep 2024 01:17:15 +0200
Subject: [PATCH] annotate-output now accepts a datetime format, so let's use
 it

update plot_mhz19.py to expect useful datetime values and remove startdate
arg
---
 Makefile      |  5 ++---
 plot_mhz19.py | 15 ++++-----------
 2 files changed, 6 insertions(+), 14 deletions(-)

diff --git a/Makefile b/Makefile
index ad71d10..cfcd0f3 100644
--- a/Makefile
+++ b/Makefile
@@ -20,11 +20,10 @@ all: $(CURDIR)
 log.csv: log
 	cp $< $@
 	fromdos $@
-	sed -i -e '/Started/ d' -e '/Finished/ d' -e '/error: / d' -e '/-[0-9]/ d' -e '/^I: / d' -e 's/ O: /,/g' $@
+	sed -i -e '/Started/ d' -e '/Finished/ d' -e '/error: / d' -e '/,-[0-9]/ d' -e '/^I: / d' -e 's/ O: /,/g' $@
 	perl -ni -e 'BEGIN{$$i=0}; print if ($$_ !~ /CO2/ || $$i == 0); $$i++;' $@
 
-STARTDATE=$(shell date "+%F" --date @$$(stat --format "%Y" $$(find -name "log-*.gz" | sort | tail -n 1)))
 plot: log.csv
-	./plot_mhz19.py --startdate $(STARTDATE) $<
+	./plot_mhz19.py $<
 
 .PHONY: log.csv plot
diff --git a/plot_mhz19.py b/plot_mhz19.py
index defb0da..7d53481 100755
--- a/plot_mhz19.py
+++ b/plot_mhz19.py
@@ -6,24 +6,18 @@ from datetime import datetime, date, timedelta
 from matplotlib import pyplot as plt
 
 '''
+# annotate-output +"%F %T" ./log_mhz19.py -d /dev/arduino | tee -a log
 filename = 'log.csv'
 Time,TS,CO2,Temp
-21:02:02,0,661,24
-21:02:08,5021,657,24
-
+2024-09-22 01:08:15,279472,1578,24
+2024-09-22 01:08:20,284518,1577,24
 '''
 
-def parsedatetime(timevalue, currentdate):
-    dt = datetime.strptime(timevalue, '%H:%M:%S')
-    return datetime.combine(currentdate, dt.time())
-
 def main():
     parser = argparse.ArgumentParser('Plot log.csv.')
     parser.add_argument('filename', nargs='?', default='log.csv', help='Name of csv file')
-    parser.add_argument('-s', '--startdate', nargs='?', default='2020-10-22', help='First date in csv file')
     parser.add_argument('-t', '--temperature', action='store_true', help='Include temperature plot')
     args = parser.parse_args()
-    startdate = datetime.strptime(args.startdate, '%Y-%m-%d').date()
 
     with open(args.filename) as f:
         reader = csv.reader(f)
@@ -33,9 +27,8 @@ def main():
         co2 = []
         temp = []
         for row in reader:
-            dt = parsedatetime(row[0], startdate)
+            dt = datetime.strptime(row[0], '%Y-%m-%d %H:%M:%S')
             if len(time) > 0 and dt - time[-1] < timedelta(hours=-2): # DST switch!
-                startdate += timedelta(days=1)
                 dt += timedelta(days=1)
             time.append(dt)
             co2.append(int(row[2]))
-- 
2.39.5