CO2 readings too low and inaccurate

New sensors integration, sensor boards usage...
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diunu
Posts: 6
Joined: Fri Nov 08, 2019 2:53 am
Company: iUNU, Inc.

CO2 readings too low and inaccurate

Post by diunu » Sat Dec 14, 2019 12:26 am

Hello

We are using several dedicated Environment Pros with a single CO2 sensors connected that are producing results too low to be accurate, even though these are supposed to be factory calibrated units. Warm up time is two minutes for our sensors, with a 28 min sleep cycle to preserve battery life while charging from your Solar panels. The name is a friendly mapping from the serial. All units are at 90+ percent battery levels.

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{'timestamp': '2019-12-12T10:58:40.537292', 'data': {'co2': 637.03710000000001}, 'name': 'wm018'}
{'timestamp': '2019-12-12T11:05:48.425949', 'data': {'co2': 349.60579999999999}, 'name': 'wm028'}
{'timestamp': '2019-12-12T11:35:58.973321', 'data': {'co2': 342.14330000000001}, 'name': 'wm028'}
{'timestamp': '2019-12-12T11:39:36.202490', 'data': {'co2': 93.764970000000005}, 'name': 'wm024'}
{'timestamp': '2019-12-12T11:39:55.120134', 'data': {'co2': 708.84910000000002}, 'name': 'wm027'}
{'timestamp': '2019-12-12T11:46:12.677857', 'data': {'co2': 162.14019999999999}, 'name': 'wm022'}
{'timestamp': '2019-12-12T11:48:47.439537', 'data': {'co2': 423.8485}, 'name': 'wm026'}
{'timestamp': '2019-12-12T11:59:18.394448', 'data': {'co2': 637.03710000000001}, 'name': 'wm018'}
{'timestamp': '2019-12-12T12:06:09.552702', 'data': {'co2': 338.43549999999999}, 'name': 'wm028'}
{'timestamp': '2019-12-12T12:09:44.229726', 'data': {'co2': 79.021839999999997}, 'name': 'wm024'}
{'timestamp': '2019-12-12T12:10:05.261252', 'data': {'co2': 737.59500000000003}, 'name': 'wm027'}
{'timestamp': '2019-12-12T14:06:34.431624', 'data': {'co2': 169.7954}, 'name': 'wm022'}
{'timestamp': '2019-12-12T14:06:44.380910', 'data': {'co2': 320.13130000000001}, 'name': 'wm028'}
{'timestamp': '2019-12-12T14:10:15.339513', 'data': {'co2': 93.577190000000002}, 'name': 'wm024'}
{'timestamp': '2019-12-12T14:10:33.705250', 'data': {'co2': 728.01310000000001}, 'name': 'wm027'}
{'timestamp': '2019-12-12T14:16:59.344729', 'data': {'co2': 162.0933}, 'name': 'wm022'}
{'timestamp': '2019-12-12T14:19:33.403813', 'data': {'co2': 443.10930000000002}, 'name': 'wm026'}
{'timestamp': '2019-12-12T14:24:50.786935', 'data': {'co2': 0}, 'name': 'wm022'}
{'timestamp': '2019-12-12T14:30:29.700717', 'data': {'co2': 656.25609999999995}, 'name': 'wm018'}
{'timestamp': '2019-12-12T14:36:52.142181', 'data': {'co2': 312.66890000000001}, 'name': 'wm028'}
{'timestamp': '2019-12-12T14:55:01.841789', 'data': {'co2': 0}, 'name': 'wm022'}
{'timestamp': '2019-12-12T15:00:36.727700', 'data': {'co2': 636.99019999999996}, 'name': 'wm018'}
{'timestamp': '2019-12-12T15:06:59.612781', 'data': {'co2': 312.66890000000001}, 'name': 'wm028'}
{'timestamp': '2019-12-12T15:10:33.802721', 'data': {'co2': 93.483260000000001}, 'name': 'wm024'}
{'timestamp': '2019-12-12T15:10:54.877708', 'data': {'co2': 699.2672}, 'name': 'wm027'}
{'timestamp': '2019-12-12T15:17:14.875522', 'data': {'co2': 169.7484}, 'name': 'wm022'}
{'timestamp': '2019-12-12T15:19:47.886807', 'data': {'co2': 395.66210000000001}, 'name': 'wm026'}
{'timestamp': '2019-12-12T15:25:05.328573', 'data': {'co2': 0}, 'name': 'wm022'}
{'timestamp': '2019-12-12T15:30:44.360917', 'data': {'co2': 436.38990000000001}, 'name': 'wm018'}
{'timestamp': '2019-12-12T15:37:08.389924', 'data': {'co2': 305.30020000000002}, 'name': 'wm028'}
{'timestamp': '2019-12-12T15:40:41.405439', 'data': {'co2': 19.908239999999999}, 'name': 'wm024'}
{'timestamp': '2019-12-12T15:40:56.353563', 'data': {'co2': 537.2192}, 'name': 'wm027'}
{'timestamp': '2019-12-12T15:47:24.319303', 'data': {'co2': 89.815049999999999}, 'name': 'wm022'}
{'timestamp': '2019-12-12T15:49:55.521168', 'data': {'co2': 271.50110000000001}, 'name': 'wm026'}
{'timestamp': '2019-12-12T15:55:17.090125', 'data': {'co2': 0}, 'name': 'wm022'}
{'timestamp': '2019-12-12T16:00:51.345536', 'data': {'co2': 340.81240000000003}, 'name': 'wm018'}
{'timestamp': '2019-12-12T16:17:31.590730', 'data': {'co2': 1.6628270000000001}, 'name': 'wm022'}
{'timestamp': '2019-12-12T16:20:04.426157', 'data': {'co2': 203.94759999999999}, 'name': 'wm026'}
{'timestamp': '2019-12-12T16:25:20.888972', 'data': {'co2': 0}, 'name': 'wm022'}
{'timestamp': '2019-12-12T16:30:58.819641', 'data': {'co2': 283.15559999999999}, 'name': 'wm018'}
{'timestamp': '2019-12-12T16:37:20.675302', 'data': {'co2': 342.14330000000001}, 'name': 'wm028'}
{'timestamp': '2019-12-12T16:40:57.149789', 'data': {'co2': 0}, 'name': 'wm024'}
{'timestamp': '2019-12-12T16:41:11.857632', 'data': {'co2': 306.68849999999998}, 'name': 'wm027'}
{'timestamp': '2019-12-12T16:47:38.941573', 'data': {'co2': 0}, 'name': 'wm022'}
{'timestamp': '2019-12-12T16:50:11.566791', 'data': {'co2': 175.3854}, 'name': 'wm026'}
{'timestamp': '2019-12-12T16:55:28.482570', 'data': {'co2': 0}, 'name': 'wm022'}
{'timestamp': '2019-12-12T17:01:06.401043', 'data': {'co2': 263.93680000000001}, 'name': 'wm018'}
{'timestamp': '2019-12-12T17:07:28.410510', 'data': {'co2': 371.61790000000002}, 'name': 'wm028'}
{'timestamp': '2019-12-12T17:11:04.465110', 'data': {'co2': 0}, 'name': 'wm024'}
{'timestamp': '2019-12-12T17:11:20.409232', 'data': {'co2': 268.4076}, 'name': 'wm027'}
{'timestamp': '2019-12-12T17:17:47.316050', 'data': {'co2': 0}, 'name': 'wm022'}
{'timestamp': '2019-12-12T17:20:19.592978', 'data': {'co2': 146.11850000000001}, 'name': 'wm026'}
{'timestamp': '2019-12-12T17:31:14.499002', 'data': {'co2': 244.9059}, 'name': 'wm018'}
{'timestamp': '2019-12-12T17:37:36.622868', 'data': {'co2': 386.26119999999997}, 'name': 'wm028'}
{'timestamp': '2019-12-12T17:41:28.474507', 'data': {'co2': 287.57150000000001}, 'name': 'wm027'}
{'timestamp': '2019-12-12T18:31:48.770176', 'data': {'co2': 225.73390000000001}, 'name': 'wm018'}
{'timestamp': '2019-12-12T18:38:21.326320', 'data': {'co2': 401.09230000000002}, 'name': 'wm028'}
{'timestamp': '2019-12-12T18:42:14.527566', 'data': {'co2': 258.87270000000001}, 'name': 'wm027'}
{'timestamp': '2019-12-12T18:48:44.542451', 'data': {'co2': 0}, 'name': 'wm024'}
{'timestamp': '2019-12-12T18:51:58.026847', 'data': {'co2': 0}, 'name': 'wm022'}
{'timestamp': '2019-12-12T19:00:21.168733', 'data': {'co2': 0}, 'name': 'wm022'}
{'timestamp': '2019-12-12T19:07:24.511952', 'data': {'co2': 216.148}, 'name': 'wm018'}
{'timestamp': '2019-12-12T19:08:29.356530', 'data': {'co2': 378.93950000000001}, 'name': 'wm028'}
{'timestamp': '2019-12-12T19:12:22.572347', 'data': {'co2': 258.82569999999998}, 'name': 'wm027'}
{'timestamp': '2019-12-12T19:18:52.964268', 'data': {'co2': 0}, 'name': 'wm024'}
{'timestamp': '2019-12-12T19:21:50.687294', 'data': {'co2': 146.3064}, 'name': 'wm026'}
{'timestamp': '2019-12-12T19:22:05.613696', 'data': {'co2': 0}, 'name': 'wm022'}
{'timestamp': '2019-12-12T19:30:29.212639', 'data': {'co2': 0}, 'name': 'wm022'}
{'timestamp': '2019-12-12T19:37:32.602176', 'data': {'co2': 225.73390000000001}, 'name': 'wm018'}
{'timestamp': '2019-12-12T19:38:36.812528', 'data': {'co2': 371.61790000000002}, 'name': 'wm028'}
{'timestamp': '2019-12-12T19:42:30.578530', 'data': {'co2': 258.77870000000001}, 'name': 'wm027'}
{'timestamp': '2019-12-12T19:49:00.645716', 'data': {'co2': 0}, 'name': 'wm024'}
{'timestamp': '2019-12-12T19:51:58.692105', 'data': {'co2': 146.11850000000001}, 'name': 'wm026'}
{'timestamp': '2019-12-12T19:52:14.078413', 'data': {'co2': 0}, 'name': 'wm022'}
{'timestamp': '2019-12-12T20:07:40.630650', 'data': {'co2': 216.19489999999999}, 'name': 'wm018'}
{'timestamp': '2019-12-12T20:08:43.829991', 'data': {'co2': 302.81279999999998}, 'name': 'wm028'}
{'timestamp': '2019-12-12T20:12:38.614379', 'data': {'co2': 220.45089999999999}, 'name': 'wm027'}
{'timestamp': '2019-12-12T20:19:08.620512', 'data': {'co2': 0}, 'name': 'wm024'}
{'timestamp': '2019-12-12T20:22:08.399529', 'data': {'co2': 146.11850000000001}, 'name': 'wm026'}
{'timestamp': '2019-12-12T20:22:21.071618', 'data': {'co2': 0}, 'name': 'wm022'}
{'timestamp': '2019-12-12T20:26:30.213749', 'data': {'co2': 0}, 'name': 'wm022'}
{'timestamp': '2019-12-12T20:37:48.089169', 'data': {'co2': 225.73390000000001}, 'name': 'wm018'}
{'timestamp': '2019-12-12T20:38:50.850261', 'data': {'co2': 231.8956}, 'name': 'wm028'}
{'timestamp': '2019-12-12T20:42:46.064504', 'data': {'co2': 210.72800000000001}, 'name': 'wm027'}
{'timestamp': '2019-12-12T20:49:16.074944', 'data': {'co2': 0}, 'name': 'wm024'}
{'timestamp': '2019-12-12T20:52:13.726043', 'data': {'co2': 136.5352}, 'name': 'wm026'}
{'timestamp': '2019-12-12T20:52:28.648455', 'data': {'co2': 0}, 'name': 'wm022'}
{'timestamp': '2019-12-12T20:56:38.306137', 'data': {'co2': 0}, 'name': 'wm022'}
{'timestamp': '2019-12-12T21:07:55.676943', 'data': {'co2': 235.31989999999999}, 'name': 'wm018'}
{'timestamp': '2019-12-12T21:08:58.438612', 'data': {'co2': 253.9076}, 'name': 'wm028'}
{'timestamp': '2019-12-12T21:12:53.663087', 'data': {'co2': 287.4776}, 'name': 'wm027'}
{'timestamp': '2019-12-12T21:19:23.683313', 'data': {'co2': 0}, 'name': 'wm024'}
{'timestamp': '2019-12-12T21:32:27.242389', 'data': {'co2': 0}, 'name': 'wm024'}
{'timestamp': '2019-12-12T21:38:03.704496', 'data': {'co2': 225.7809}, 'name': 'wm018'}
{'timestamp': '2019-12-12T21:39:05.979014', 'data': {'co2': 258.83569999999997}, 'name': 'wm028'}
{'timestamp': '2019-12-12T21:43:02.286572', 'data': {'co2': 354.08170000000001}, 'name': 'wm027'}
{'timestamp': '2019-12-12T21:49:31.695086', 'data': {'co2': 0}, 'name': 'wm024'}
{'timestamp': '2019-12-12T21:52:29.777915', 'data': {'co2': 127.1397}, 'name': 'wm026'}
{'timestamp': '2019-12-12T21:52:43.721020', 'data': {'co2': 0}, 'name': 'wm022'}
{'timestamp': '2019-12-12T21:56:59.809618', 'data': {'co2': 0}, 'name': 'wm022'}
{'timestamp': '2019-12-12T22:08:11.168225', 'data': {'co2': 225.73390000000001}, 'name': 'wm018'}
{'timestamp': '2019-12-12T22:09:13.477556', 'data': {'co2': 239.21729999999999}, 'name': 'wm028'}
{'timestamp': '2019-12-12T22:13:10.137496', 'data': {'co2': 392.5505}, 'name': 'wm027'}
{'timestamp': '2019-12-12T22:19:39.725665', 'data': {'co2': 0}, 'name': 'wm024'}
{'timestamp': '2019-12-12T22:27:06.857097', 'data': {'co2': 0}, 'name': 'wm022'}
{'timestamp': '2019-12-12T22:38:18.197495', 'data': {'co2': 235.1788}, 'name': 'wm018'}
{'timestamp': '2019-12-12T22:39:20.946151', 'data': {'co2': 224.57390000000001}, 'name': 'wm028'}
{'timestamp': '2019-12-12T22:43:17.188957', 'data': {'co2': 411.66739999999999}, 'name': 'wm027'}
{'timestamp': '2019-12-12T22:49:47.744702', 'data': {'co2': 0}, 'name': 'wm024'}
{'timestamp': '2019-12-12T22:52:58.263616', 'data': {'co2': 156.0778}, 'name': 'wm026'}
{'timestamp': '2019-12-12T22:53:03.297958', 'data': {'co2': 67.638869999999997}, 'name': 'wm022'}
{'timestamp': '2019-12-12T22:57:14.504187', 'data': {'co2': 0}, 'name': 'wm022'}
{'timestamp': '2019-12-12T23:13:26.935007', 'data': {'co2': 430.8313}, 'name': 'wm027'}
{'timestamp': '2019-12-12T23:19:55.786271', 'data': {'co2': 0}, 'name': 'wm024'}
{'timestamp': '2019-12-12T23:23:06.157256', 'data': {'co2': 203.43090000000001}, 'name': 'wm026'}
{'timestamp': '2019-12-12T23:23:08.116898', 'data': {'co2': 45.528979999999997}, 'name': 'wm022'}
{'timestamp': '2019-12-12T23:27:22.451714', 'data': {'co2': 0}, 'name': 'wm022'}
{'timestamp': '2019-12-12T23:38:32.406713', 'data': {'co2': 302.28059999999999}, 'name': 'wm018'}
{'timestamp': '2019-12-12T23:39:40.601288', 'data': {'co2': 246.58590000000001}, 'name': 'wm028'}
{'timestamp': '2019-12-12T23:43:35.387234', 'data': {'co2': 450.0421}, 'name': 'wm027'}
{'timestamp': '2019-12-12T23:53:13.561612', 'data': {'co2': 261.1191}, 'name': 'wm026'}
{'timestamp': '2019-12-13T16:40:13.238735', 'data': {'co2': 261.1191}, 'name': 'wm026'}
{'timestamp': '2019-12-13T16:44:07.401115', 'data': {'co2': 0}, 'name': 'wm022'}
{'timestamp': '2019-12-13T16:54:57.579852', 'data': {'co2': 302.32749999999999}, 'name': 'wm018'}
{'timestamp': '2019-12-13T16:56:32.043843', 'data': {'co2': 134.08539999999999}, 'name': 'wm028'}
{'timestamp': '2019-12-13T17:00:10.775357', 'data': {'co2': 249.38460000000001}, 'name': 'wm027'}
{'timestamp': '2019-12-13T17:06:47.571811', 'data': {'co2': 0}, 'name': 'wm024'}
{'timestamp': '2019-12-13T17:10:06.322788', 'data': {'co2': 213.578}, 'name': 'wm026'}
{'timestamp': '2019-12-13T17:10:23.268968', 'data': {'co2': 0}, 'name': 'wm022'}
{'timestamp': '2019-12-13T17:14:14.882011', 'data': {'co2': 0}, 'name': 'wm022'}
{'timestamp': '2019-12-13T17:36:56.223329', 'data': {'co2': 0}, 'name': 'wm024'}
{'timestamp': '2019-12-13T17:40:12.556808', 'data': {'co2': 184.68700000000001}, 'name': 'wm026'}
{'timestamp': '2019-12-13T17:40:30.861174', 'data': {'co2': 0}, 'name': 'wm022'}
{'timestamp': '2019-12-13T17:44:23.945319', 'data': {'co2': 0}, 'name': 'wm022'}
{'timestamp': '2019-12-13T17:55:15.756239', 'data': {'co2': 302.37450000000001}, 'name': 'wm018'}
{'timestamp': '2019-12-13T17:56:50.087488', 'data': {'co2': 0}, 'name': 'wm028'}
{'timestamp': '2019-12-13T18:00:25.829882', 'data': {'co2': 220.40389999999999}, 'name': 'wm027'}
{'timestamp': '2019-12-13T18:07:02.902239', 'data': {'co2': 0}, 'name': 'wm024'}
{'timestamp': '2019-12-13T18:14:30.577081', 'data': {'co2': 0}, 'name': 'wm022'}
{'timestamp': '2019-12-13T18:55:29.661365', 'data': {'co2': 302.13959999999997}, 'name': 'wm018'}
{'timestamp': '2019-12-13T18:57:34.869195', 'data': {'co2': 0}, 'name': 'wm028'}
{'timestamp': '2019-12-13T19:01:11.567555', 'data': {'co2': 182.0761}, 'name': 'wm027'}
{'timestamp': '2019-12-13T19:07:19.570346', 'data': {'co2': 0}, 'name': 'wm024'}
{'timestamp': '2019-12-13T19:11:05.629334', 'data': {'co2': 165.47319999999999}, 'name': 'wm026'}
{'timestamp': '2019-12-13T19:11:31.394182', 'data': {'co2': 0}, 'name': 'wm022'}
{'timestamp': '2019-12-13T19:15:16.571377', 'data': {'co2': 0}, 'name': 'wm022'}
{'timestamp': '2019-12-13T19:25:37.690676', 'data': {'co2': 292.64760000000001}, 'name': 'wm018'}
{'timestamp': '2019-12-13T19:27:42.475711', 'data': {'co2': 0}, 'name': 'wm028'}
{'timestamp': '2019-12-13T19:31:18.914265', 'data': {'co2': 191.04740000000001}, 'name': 'wm027'}
{'timestamp': '2019-12-13T19:37:27.690882', 'data': {'co2': 0}, 'name': 'wm024'}
{'timestamp': '2019-12-13T19:41:13.651423', 'data': {'co2': 175.24449999999999}, 'name': 'wm026'}
{'timestamp': '2019-12-13T19:41:38.990320', 'data': {'co2': 0}, 'name': 'wm022'}
{'timestamp': '2019-12-13T19:45:24.041709', 'data': {'co2': 0}, 'name': 'wm022'}
{'timestamp': '2019-12-13T19:55:45.715296', 'data': {'co2': 292.64760000000001}, 'name': 'wm018'}
{'timestamp': '2019-12-13T19:57:49.924957', 'data': {'co2': 0}, 'name': 'wm028'}
{'timestamp': '2019-12-13T20:01:26.647267', 'data': {'co2': 191.61099999999999}, 'name': 'wm027'}
{'timestamp': '2019-12-13T20:07:35.155424', 'data': {'co2': 0}, 'name': 'wm024'}
{'timestamp': '2019-12-13T20:11:21.098553', 'data': {'co2': 185.01580000000001}, 'name': 'wm026'}
{'timestamp': '2019-12-13T20:11:46.451735', 'data': {'co2': 0}, 'name': 'wm022'}
{'timestamp': '2019-12-13T20:15:31.633253', 'data': {'co2': 0}, 'name': 'wm022'}
{'timestamp': '2019-12-13T20:25:53.740904', 'data': {'co2': 292.64760000000001}, 'name': 'wm018'}
{'timestamp': '2019-12-13T20:27:57.517914', 'data': {'co2': 0}, 'name': 'wm028'}
{'timestamp': '2019-12-13T20:31:33.415643', 'data': {'co2': 172.8699}, 'name': 'wm027'}
{'timestamp': '2019-12-13T20:37:42.774373', 'data': {'co2': 0}, 'name': 'wm024'}
{'timestamp': '2019-12-13T20:41:28.128018', 'data': {'co2': 175.24449999999999}, 'name': 'wm026'}
{'timestamp': '2019-12-13T20:41:54.049676', 'data': {'co2': 0}, 'name': 'wm022'}
{'timestamp': '2019-12-13T20:45:39.938350', 'data': {'co2': 0}, 'name': 'wm022'}
{'timestamp': '2019-12-13T20:56:01.769448', 'data': {'co2': 292.8356}, 'name': 'wm018'}
{'timestamp': '2019-12-13T20:58:05.557374', 'data': {'co2': 0}, 'name': 'wm028'}
{'timestamp': '2019-12-13T21:01:40.443386', 'data': {'co2': 181.9821}, 'name': 'wm027'}
{'timestamp': '2019-12-13T21:07:53.907223', 'data': {'co2': 0}, 'name': 'wm024'}
{'timestamp': '2019-12-13T21:11:35.102496', 'data': {'co2': 175.24449999999999}, 'name': 'wm026'}
{'timestamp': '2019-12-13T21:12:02.264996', 'data': {'co2': 0}, 'name': 'wm022'}
{'timestamp': '2019-12-13T21:15:47.692150', 'data': {'co2': 0}, 'name': 'wm022'}
{'timestamp': '2019-12-13T21:26:13.683372', 'data': {'co2': 302.42160000000001}, 'name': 'wm018'}
{'timestamp': '2019-12-13T21:28:13.552482', 'data': {'co2': 0}, 'name': 'wm028'}
{'timestamp': '2019-12-13T21:31:48.032793', 'data': {'co2': 210.77500000000001}, 'name': 'wm027'}
{'timestamp': '2019-12-13T21:37:57.271633', 'data': {'co2': 0}, 'name': 'wm024'}
{'timestamp': '2019-12-13T21:41:42.711074', 'data': {'co2': 175.24449999999999}, 'name': 'wm026'}
{'timestamp': '2019-12-13T21:42:10.148458', 'data': {'co2': 0}, 'name': 'wm022'}
{'timestamp': '2019-12-13T21:45:55.719408', 'data': {'co2': 0}, 'name': 'wm022'}
{'timestamp': '2019-12-13T21:56:21.242856', 'data': {'co2': 302.32749999999999}, 'name': 'wm018'}
{'timestamp': '2019-12-13T21:58:21.016690', 'data': {'co2': 0}, 'name': 'wm028'}
{'timestamp': '2019-12-13T22:01:55.551340', 'data': {'co2': 191.70500000000001}, 'name': 'wm027'}
{'timestamp': '2019-12-13T22:08:04.782401', 'data': {'co2': 0}, 'name': 'wm024'}
{'timestamp': '2019-12-13T22:11:50.407731', 'data': {'co2': 175.24449999999999}, 'name': 'wm026'}
{'timestamp': '2019-12-13T22:12:17.558506', 'data': {'co2': 0}, 'name': 'wm022'}
{'timestamp': '2019-12-13T22:16:03.173534', 'data': {'co2': 0}, 'name': 'wm022'}
{'timestamp': '2019-12-13T22:26:28.808743', 'data': {'co2': 311.96050000000002}, 'name': 'wm018'}
{'timestamp': '2019-12-13T22:28:28.594552', 'data': {'co2': 0}, 'name': 'wm028'}
{'timestamp': '2019-12-13T22:32:04.731027', 'data': {'co2': 191.5641}, 'name': 'wm027'}
{'timestamp': '2019-12-13T22:38:12.808614', 'data': {'co2': 0}, 'name': 'wm024'}
{'timestamp': '2019-12-13T22:41:57.807818', 'data': {'co2': 175.24449999999999}, 'name': 'wm026'}
{'timestamp': '2019-12-13T22:42:25.153228', 'data': {'co2': 0}, 'name': 'wm022'}
{'timestamp': '2019-12-13T22:46:12.000524', 'data': {'co2': 0}, 'name': 'wm022'}
{'timestamp': '2019-12-13T22:56:36.287740', 'data': {'co2': 311.96050000000002}, 'name': 'wm018'}
{'timestamp': '2019-12-13T22:58:36.629906', 'data': {'co2': 0}, 'name': 'wm028'}
{'timestamp': '2019-12-13T23:02:14.868419', 'data': {'co2': 210.72800000000001}, 'name': 'wm027'}
{'timestamp': '2019-12-13T23:08:20.847390', 'data': {'co2': 0}, 'name': 'wm024'}
{'timestamp': '2019-12-13T23:12:05.229771', 'data': {'co2': 165.47319999999999}, 'name': 'wm026'}
{'timestamp': '2019-12-13T23:12:33.146766', 'data': {'co2': 0}, 'name': 'wm022'}
{'timestamp': '2019-12-13T23:16:25.472881', 'data': {'co2': 0}, 'name': 'wm022'}

libelium-dev
Posts: 27967
Joined: Mon Sep 28, 2009 1:06 pm

Re: CO2 readings too low and inaccurate

Post by libelium-dev » Mon Dec 16, 2019 11:52 am

Hi,

Usually, the CO2 gas sensors return low values the first time they are read after being turned ON. Could you please try to discard the first measure and perform the average of 5-10 readings. Something like this

Code: Select all

    gas_PRO_sensor.getConc(); //discard firts value
    concentration = 0.0;
    for(uint8_t i=0; i<10; i++){
        concentration = concentration + gas_PRO_sensor.getConc();
    }
    concentration = concentration/10;
Let us know the result after applying that change.
Regards

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