Mercurial > templog
annotate web/log.py @ 75:ca08442635ca
report raw ds18b20 values instead
| author | Matt Johnston <matt@ucc.asn.au> |
|---|---|
| date | Tue, 03 Jul 2012 22:44:21 +0800 |
| parents | 0a8639039453 |
| children | 959e88c0bdfa |
| rev | line source |
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1 #:vim:et:ts=4:sts=4:sw=4: |
| 27 | 2 import rrdtool |
| 3 import os | |
| 29 | 4 import os.path |
| 27 | 5 import sys |
| 29 | 6 import glob |
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7 import hashlib |
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8 import tempfile |
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9 import time |
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10 import syslog |
| 44 | 11 import sqlite3 |
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12 import traceback |
| 67 | 13 import datetime |
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14 import struct |
| 29 | 15 from colorsys import hls_to_rgb |
| 27 | 16 |
| 28 | 17 import config |
| 27 | 18 |
| 19 def sensor_rrd_path(s): | |
| 28 | 20 return '%s/sensor_%s.rrd' % (config.DATA_PATH, s) |
| 27 | 21 |
| 29 | 22 # returns (path, sensor_name) tuples |
| 23 def all_sensors(): | |
| 24 return [(r, os.path.basename(r[:-4])) | |
| 25 for r in glob.glob('%s/*.rrd' % config.DATA_PATH)] | |
| 26 | |
| 27 | 27 def create_rrd(sensor_id): |
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28 # start date of 10 seconds into 1970 is used so that we can |
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29 # update with prior values straight away. |
| 61 | 30 if 'voltage' in sensor_id: |
| 63 | 31 args = [ |
| 32 '--step', '3600', | |
| 33 'DS:temp:GAUGE:7200:1:10', | |
| 34 'RRA:AVERAGE:0.5:1:87600'] | |
| 61 | 35 else: |
| 63 | 36 args = [ |
| 37 '--step', '300', | |
| 38 'DS:temp:GAUGE:600:-10:100', | |
| 61 | 39 'RRA:AVERAGE:0.5:1:1051200'] |
| 27 | 40 |
| 61 | 41 rrdtool.create(sensor_rrd_path(sensor_id), |
| 63 | 42 '--start', 'now-60d', |
| 61 | 43 *args) |
| 29 | 44 |
| 45 # stolen from viewmtn, stolen from monotone-viz | |
| 46 def colour_from_string(str): | |
| 47 def f(off): | |
| 48 return ord(hashval[off]) / 256.0 | |
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49 hashval = hashlib.sha1(str).digest() |
| 29 | 50 hue = f(5) |
| 51 li = f(1) * 0.15 + 0.55 | |
| 52 sat = f(2) * 0.5 + .5 | |
| 53 return ''.join(["%.2x" % int(x * 256) for x in hls_to_rgb(hue, li, sat)]) | |
| 54 | |
| 55 def graph_png(start, length): | |
| 56 rrds = all_sensors() | |
| 57 | |
| 58 graph_args = [] | |
| 61 | 59 have_volts = False |
| 29 | 60 for n, (rrdfile, sensor) in enumerate(rrds): |
| 61 | 61 if 'avrtemp' in sensor: |
| 62 continue | |
| 63 if 'voltage' in sensor: | |
| 64 have_volts = True | |
| 65 vname = 'scalevolts' | |
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66 graph_args.append('DEF:%(vname)s=%(rrdfile)s:temp:AVERAGE:step=3600' % locals()) |
| 61 | 67 else: |
| 68 vname = 'temp%d' % n | |
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69 graph_args.append('DEF:raw%(vname)s=%(rrdfile)s:temp:AVERAGE' % locals()) |
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70 graph_args.append('CDEF:%(vname)s=raw%(vname)s,0.1,*,2,+' % locals()) |
| 29 | 71 width = config.LINE_WIDTH |
| 72 legend = config.SENSOR_NAMES.get(sensor, sensor) | |
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73 colour = config.SENSOR_COLOURS.get(legend, colour_from_string(sensor)) |
| 29 | 74 graph_args.append('LINE%(width)f:%(vname)s#%(colour)s:%(legend)s' % locals()) |
| 75 | |
| 67 | 76 end = int(start+length) |
| 77 start = int(start) | |
| 78 | |
| 29 | 79 tempf = tempfile.NamedTemporaryFile() |
| 67 | 80 dateformat = '%H:%M:%S %Y-%m-%d' |
| 81 watermark = ("Now %s\t" | |
| 82 "Start %s\t" | |
| 83 "End %s" % ( | |
| 84 datetime.datetime.now().strftime(dateformat), | |
| 85 datetime.datetime.fromtimestamp(start).strftime(dateformat), | |
| 86 datetime.datetime.fromtimestamp(end).strftime(dateformat) )) | |
| 87 | |
| 88 args = [tempf.name, '-s', str(start), | |
| 89 '-e', str(end), | |
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90 '-w', str(config.GRAPH_WIDTH), |
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91 '-h', str(config.GRAPH_HEIGHT), |
| 29 | 92 '--slope-mode', |
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93 '--border', '0', |
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94 # '--vertical-label', 'Voltage', |
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95 '--y-grid', '0.1:1', |
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96 '--dynamic-labels', |
| 56 | 97 '--grid-dash', '1:0', |
| 98 '--color', 'GRID#00000000', | |
| 99 '--color', 'MGRID#aaaaaa', | |
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100 '--color', 'BACK#ffffff', |
| 67 | 101 '--disable-rrdtool-tag', |
| 102 '--watermark', watermark, | |
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103 '--imgformat', 'PNG'] \ |
| 29 | 104 + graph_args |
| 67 | 105 args += ['--font', 'DEFAULT:12:%s' % config.GRAPH_FONT] |
| 106 args += ['--font', 'WATERMARK:10:%s' % config.GRAPH_FONT] | |
| 61 | 107 if have_volts: |
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108 args += ['--right-axis', '10:-20', # matches the scalevolts CDEF above |
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109 '--right-axis-format', '%.0lf', |
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110 # '--right-axis-label', 'Temperature' |
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111 ] |
| 61 | 112 |
| 29 | 113 rrdtool.graph(*args) |
| 114 return tempf.read() | |
| 115 | |
| 27 | 116 def sensor_update(sensor_id, measurements, first_real_time, time_step): |
| 117 try: | |
| 118 open(sensor_rrd_path(sensor_id)) | |
| 119 except IOError, e: | |
| 120 create_rrd(sensor_id) | |
| 121 | |
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122 if measurements: |
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123 values = ['%d:%f' % p for p in |
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124 zip((first_real_time + time_step*t for t in xrange(len(measurements))), |
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125 measurements)] |
| 27 | 126 |
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127 rrdfile = sensor_rrd_path(sensor_id) |
| 40 | 128 # XXX what to do here when it fails... |
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129 for v in values: |
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130 try: |
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131 rrdtool.update(rrdfile, v) |
| 63 | 132 except rrdtool.error, e: |
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133 print>>sys.stderr, "Bad rrdtool update '%s'" % v |
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134 traceback.print_exc(file=sys.stderr) |
| 33 | 135 |
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136 # be paranoid |
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137 f = file(rrdfile) |
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138 os.fsync(f.fileno()) |
| 27 | 139 |
| 33 | 140 def record_debug(lines): |
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141 f = open('%s/debug.log' % config.DATA_PATH, 'a+') |
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142 f.write('===== %s =====\n' % time.strftime('%a, %d %b %Y %H:%M:%S')) |
| 33 | 143 f.writelines(('%s\n' % s for s in lines)) |
| 144 f.flush() | |
| 145 return f | |
| 146 | |
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147 def convert_ds18b20_12bit(reading): |
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148 value = struct.unpack('>h', binascii.unhexlify(reading))[0] |
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149 return value * 0.0625 |
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150 |
| 27 | 151 def parse(lines): |
| 33 | 152 |
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153 debugf = record_debug(lines) |
| 33 | 154 |
| 27 | 155 entries = dict(l.split('=', 1) for l in lines) |
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156 if len(entries) != len(lines): |
| 27 | 157 raise Exception("Keys are not unique") |
| 158 | |
| 159 num_sensors = int(entries['sensors']) | |
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160 num_measurements = int(entries['measurements']) |
| 27 | 161 |
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162 sensors = [entries['sensor_id%d' % n] for n in xrange(num_sensors)] |
| 27 | 163 |
| 164 meas = [] | |
| 165 for s in sensors: | |
| 166 meas.append([]) | |
| 167 | |
| 168 for n in xrange(num_measurements): | |
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169 vals = [val_scale(int(x)) for x in entries["meas%d" % n].strip().split()] |
| 27 | 170 if len(vals) != num_sensors: |
| 171 raise Exception("Wrong number of sensors for measurement %d" % n) | |
| 172 # we make an array of values for each sensor | |
| 173 for s in xrange(num_sensors): | |
| 174 meas[s].append(vals[s]) | |
| 175 | |
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176 avr_now = float(entries['now']) |
| 27 | 177 avr_first_time = float(entries['first_time']) |
| 178 time_step = float(entries['time_step']) | |
| 179 | |
| 61 | 180 if 'avrtemp' in entries: |
| 181 avrtemp = val_scale(int(entries['avrtemp'])) | |
| 182 sensor_update('avrtemp', [avrtemp], time.time(), 1) | |
| 183 | |
| 184 if 'voltage' in entries: | |
| 185 voltage = 0.001 * int(entries['voltage']) | |
| 186 sensor_update('voltage', [voltage], time.time(), 1) | |
| 187 | |
| 40 | 188 #sqlite |
| 189 # - time | |
| 190 # - voltage | |
| 191 # - boot time | |
| 192 | |
| 27 | 193 first_real_time = time.time() - (avr_now - avr_first_time) |
| 194 | |
| 195 for sensor_id, measurements in zip(sensors, meas): | |
| 40 | 196 # XXX sqlite add |
| 27 | 197 sensor_update(sensor_id, measurements, first_real_time, time_step) |
| 33 | 198 |
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199 debugf.write("Updated %d sensors\n" % len(sensors)) |
| 33 | 200 debugf.flush() |