Mercurial > templog
annotate web/log.py @ 137:d36fe81077cc
strip multiple-of-ten temperatures correctly
author | Matt Johnston <matt@ucc.asn.au> |
---|---|
date | Mon, 22 Oct 2012 21:08:31 +0800 |
parents | 719d5669ab27 |
children | 3b4277aaed3c |
rev | line source |
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78 | 1 # -*- coding: utf-8 -*- |
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2 #:vim:et:ts=4:sts=4:sw=4: |
27 | 3 import rrdtool |
4 import os | |
29 | 5 import os.path |
27 | 6 import sys |
29 | 7 import glob |
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8 import hashlib |
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9 import tempfile |
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10 import time |
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11 import syslog |
44 | 12 import sqlite3 |
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13 import traceback |
67 | 14 import datetime |
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15 import struct |
77 | 16 import binascii |
29 | 17 from colorsys import hls_to_rgb |
27 | 18 |
28 | 19 import config |
27 | 20 |
21 def sensor_rrd_path(s): | |
28 | 22 return '%s/sensor_%s.rrd' % (config.DATA_PATH, s) |
27 | 23 |
29 | 24 # returns (path, sensor_name) tuples |
25 def all_sensors(): | |
26 return [(r, os.path.basename(r[:-4])) | |
27 for r in glob.glob('%s/*.rrd' % config.DATA_PATH)] | |
28 | |
27 | 29 def create_rrd(sensor_id): |
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30 # start date of 10 seconds into 1970 is used so that we can |
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31 # update with prior values straight away. |
61 | 32 if 'voltage' in sensor_id: |
63 | 33 args = [ |
34 '--step', '3600', | |
35 'DS:temp:GAUGE:7200:1:10', | |
36 'RRA:AVERAGE:0.5:1:87600'] | |
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37 elif 'fridge_on' in sensor_id: |
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38 args = [ |
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39 '--step', '300', |
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40 'DS:temp:GAUGE:600:-100:500', |
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41 'RRA:LAST:0.5:1:1051200'] |
61 | 42 else: |
63 | 43 args = [ |
44 '--step', '300', | |
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45 'DS:temp:GAUGE:600:-100:500', |
61 | 46 'RRA:AVERAGE:0.5:1:1051200'] |
27 | 47 |
61 | 48 rrdtool.create(sensor_rrd_path(sensor_id), |
63 | 49 '--start', 'now-60d', |
61 | 50 *args) |
29 | 51 |
52 # stolen from viewmtn, stolen from monotone-viz | |
53 def colour_from_string(str): | |
54 def f(off): | |
55 return ord(hashval[off]) / 256.0 | |
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56 hashval = hashlib.sha1(str).digest() |
29 | 57 hue = f(5) |
58 li = f(1) * 0.15 + 0.55 | |
59 sat = f(2) * 0.5 + .5 | |
60 return ''.join(["%.2x" % int(x * 256) for x in hls_to_rgb(hue, li, sat)]) | |
61 | |
62 def graph_png(start, length): | |
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63 os.environ['MATT_PNG_BODGE_COMPRESS'] = '4' |
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64 os.environ['MATT_PNG_BODGE_FILTER'] = 'paeth' |
29 | 65 rrds = all_sensors() |
66 | |
67 graph_args = [] | |
61 | 68 have_volts = False |
29 | 69 for n, (rrdfile, sensor) in enumerate(rrds): |
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70 unit = None |
61 | 71 if 'avrtemp' in sensor: |
72 continue | |
73 if 'voltage' in sensor: | |
74 have_volts = True | |
75 vname = 'scalevolts' | |
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76 graph_args.append('DEF:%(vname)s=%(rrdfile)s:temp:AVERAGE:step=3600' % locals()) |
78 | 77 unit = 'V' |
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78 elif 'fridge_on' in sensor: |
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79 vname = 'fridge_on' |
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80 graph_args.append('DEF:raw%(vname)s=%(rrdfile)s:temp:LAST' % locals()) |
131 | 81 graph_args.append('CDEF:%(vname)s=raw%(vname)s,-0.2,*,3,+' % locals()) |
61 | 82 else: |
83 vname = 'temp%d' % n | |
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84 graph_args.append('DEF:raw%(vname)s=%(rrdfile)s:temp:AVERAGE' % locals()) |
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85 # limit max temp to 50 |
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86 graph_args.append('CDEF:%(vname)s=raw%(vname)s,35,GT,UNKN,raw%(vname)s,0.1,*,2,+,IF' % locals()) |
78 | 87 unit = '<span face="Liberation Serif">º</span>C' |
88 | |
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89 format_last_value = None |
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90 if unit: |
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91 try: |
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92 last_value = float(rrdtool.info(rrdfile)['ds[temp].last_ds']) |
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93 format_last_value = ('%f' % last_value).rstrip('0').rstrip('.') + unit |
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94 except ValueError: |
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95 pass |
29 | 96 width = config.LINE_WIDTH |
97 legend = config.SENSOR_NAMES.get(sensor, sensor) | |
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98 colour = config.SENSOR_COLOURS.get(legend, colour_from_string(sensor)) |
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99 if format_last_value: |
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100 print_legend = '%s (%s)' % (legend, format_last_value) |
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101 else: |
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102 print_legend = legend |
78 | 103 graph_args.append('LINE%(width)f:%(vname)s#%(colour)s:%(print_legend)s' % locals()) |
29 | 104 |
67 | 105 end = int(start+length) |
106 start = int(start) | |
107 | |
29 | 108 tempf = tempfile.NamedTemporaryFile() |
67 | 109 dateformat = '%H:%M:%S %Y-%m-%d' |
110 watermark = ("Now %s\t" | |
111 "Start %s\t" | |
112 "End %s" % ( | |
113 datetime.datetime.now().strftime(dateformat), | |
114 datetime.datetime.fromtimestamp(start).strftime(dateformat), | |
115 datetime.datetime.fromtimestamp(end).strftime(dateformat) )) | |
116 | |
117 args = [tempf.name, '-s', str(start), | |
118 '-e', str(end), | |
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119 '-w', str(config.GRAPH_WIDTH), |
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120 '-h', str(config.GRAPH_HEIGHT), |
29 | 121 '--slope-mode', |
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122 '--border', '0', |
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123 # '--vertical-label', 'Voltage', |
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124 '--y-grid', '0.1:1', |
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125 '--dynamic-labels', |
56 | 126 '--grid-dash', '1:0', |
77 | 127 '--zoom', str(config.ZOOM), |
56 | 128 '--color', 'GRID#00000000', |
129 '--color', 'MGRID#aaaaaa', | |
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130 '--color', 'BACK#ffffff', |
67 | 131 '--disable-rrdtool-tag', |
78 | 132 '--pango-markup', |
67 | 133 '--watermark', watermark, |
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134 '--imgformat', 'PNG'] \ |
29 | 135 + graph_args |
67 | 136 args += ['--font', 'DEFAULT:12:%s' % config.GRAPH_FONT] |
137 args += ['--font', 'WATERMARK:10:%s' % config.GRAPH_FONT] | |
61 | 138 if have_volts: |
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139 args += ['--right-axis', '10:-20', # matches the scalevolts CDEF above |
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140 '--right-axis-format', '%.0lf', |
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141 # '--right-axis-label', 'Temperature' |
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142 ] |
61 | 143 |
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144 print>>sys.stderr, ' '.join("'%s'" % s for s in args) |
29 | 145 rrdtool.graph(*args) |
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146 #return tempf |
29 | 147 return tempf.read() |
148 | |
125 | 149 def validate_values(measurements): |
150 for m in measurements: | |
151 if m == 85: | |
152 yield 'U' | |
153 else: | |
154 yield '%f' % m | |
155 | |
27 | 156 def sensor_update(sensor_id, measurements, first_real_time, time_step): |
157 try: | |
158 open(sensor_rrd_path(sensor_id)) | |
159 except IOError, e: | |
160 create_rrd(sensor_id) | |
161 | |
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162 if measurements: |
125 | 163 values = ['%d:%s' % p for p in |
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164 zip((first_real_time + time_step*t for t in xrange(len(measurements))), |
125 | 165 validate_values(measurements))] |
27 | 166 |
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167 rrdfile = sensor_rrd_path(sensor_id) |
40 | 168 # XXX what to do here when it fails... |
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169 for v in values: |
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170 try: |
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171 rrdtool.update(rrdfile, v) |
63 | 172 except rrdtool.error, e: |
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173 print>>sys.stderr, "Bad rrdtool update '%s': %s" % (v, str(e)) |
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174 traceback.print_exc(file=sys.stderr) |
33 | 175 |
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176 # be paranoid |
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177 #f = file(rrdfile) |
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178 #os.fsync(f.fileno()) |
27 | 179 |
103 | 180 def debug_file(mode='r'): |
181 return open('%s/debug.log' % config.DATA_PATH, mode) | |
182 | |
33 | 183 def record_debug(lines): |
103 | 184 f = debug_file('a+') |
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185 f.write('===== %s =====\n' % time.strftime('%a, %d %b %Y %H:%M:%S')) |
33 | 186 f.writelines(('%s\n' % s for s in lines)) |
187 f.flush() | |
188 return f | |
189 | |
103 | 190 |
191 def tail_debug_log(): | |
192 f = debug_file() | |
193 f.seek(0, 2) | |
194 size = f.tell() | |
195 f.seek(max(0, size-30000)) | |
196 return '\n'.join(l.strip() for l in f.readlines()[-400:]) | |
197 | |
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198 def convert_ds18b20_12bit(reading): |
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199 value = struct.unpack('>h', binascii.unhexlify(reading))[0] |
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200 return value * 0.0625 |
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201 |
94 | 202 def time_rem(name, entries): |
203 val_ticks = int(entries[name]) | |
95 | 204 val_rem = int(entries['%s_rem' % name]) |
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205 tick_wake = int(entries['tick_wake']) + 1 |
94 | 206 tick_secs = int(entries['tick_secs']) |
207 return val_ticks + float(val_rem) * tick_secs / tick_wake | |
208 | |
27 | 209 def parse(lines): |
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210 |
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211 start_time = time.time() |
33 | 212 |
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213 debugf = record_debug(lines) |
33 | 214 |
27 | 215 entries = dict(l.split('=', 1) for l in lines) |
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216 if len(entries) != len(lines): |
27 | 217 raise Exception("Keys are not unique") |
218 | |
131 | 219 if 'sensors' not in entries: |
220 # only debug info, it's been recorded | |
221 return | |
222 | |
27 | 223 num_sensors = int(entries['sensors']) |
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224 num_measurements = int(entries['measurements']) |
27 | 225 |
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226 sensors = [entries['sensor_id%d' % n] for n in xrange(num_sensors)] |
27 | 227 |
228 meas = [] | |
229 for s in sensors: | |
230 meas.append([]) | |
231 | |
232 for n in xrange(num_measurements): | |
77 | 233 vals = [convert_ds18b20_12bit(x) for x in entries["meas%d" % n].strip().split()] |
27 | 234 if len(vals) != num_sensors: |
235 raise Exception("Wrong number of sensors for measurement %d" % n) | |
236 # we make an array of values for each sensor | |
237 for s in xrange(num_sensors): | |
238 meas[s].append(vals[s]) | |
239 | |
94 | 240 avr_now = time_rem('now', entries) |
241 avr_first_time = time_rem('first_time', entries) | |
242 avr_comms_time = time_rem('comms_time', entries) | |
27 | 243 time_step = float(entries['time_step']) |
244 | |
94 | 245 debugf.write('now %f, comms_time %f, first_time %f, delta %f\n' % |
246 (avr_now, avr_comms_time, avr_first_time, avr_now - avr_comms_time)) | |
247 | |
61 | 248 if 'avrtemp' in entries: |
249 avrtemp = val_scale(int(entries['avrtemp'])) | |
250 sensor_update('avrtemp', [avrtemp], time.time(), 1) | |
251 | |
252 if 'voltage' in entries: | |
253 voltage = 0.001 * int(entries['voltage']) | |
254 sensor_update('voltage', [voltage], time.time(), 1) | |
255 | |
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256 if 'fridge_status' in entries: |
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257 fridge_on = int(entries['fridge_status']) |
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258 sensor_update('fridge_on', [fridge_on], time.time(), 1) |
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259 |
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ui tweaks, add fridge values
Matt Johnston <matt@ucc.asn.au>
parents:
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260 if 'fridge' in entries: |
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parents:
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261 fridge_setpoint = float(entries['fridge']) |
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parents:
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262 sensor_update('fridge_setpoint', [fridge_setpoint], time.time(), 1) |
40 | 263 #sqlite |
264 # - time | |
265 # - voltage | |
266 # - boot time | |
267 | |
27 | 268 first_real_time = time.time() - (avr_now - avr_first_time) |
269 | |
270 for sensor_id, measurements in zip(sensors, meas): | |
40 | 271 # XXX sqlite add |
27 | 272 sensor_update(sensor_id, measurements, first_real_time, time_step) |
33 | 273 |
104
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- few more web tweaks. don't fsync, it's slow.
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parents:
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274 timedelta = time.time() - start_time |
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parents:
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275 debugf.write("Updated %d sensors in %.2f secs\n" % (len(sensors), timedelta)) |
33 | 276 debugf.flush() |