The station is based on an ESP-01 WiFi module connected to a BME280 (air pressure, humidity and temperature) and a MAX44009 (light) sensor module using the I2C bus. It operates in deep sleep mode to conserve power and transmits its data over the WIFI at 15 minute wake up intervals. It runs on one 18650 rechargeable battery via a MCP1700 3.3V regulator as the ESP-01 has a maximum recommended voltage of 3.3V.
The software now alerts by email when battery voltage starts to drop.
Note – temperature recording is highly inaccurate during daytime. The case for the station has a perspex cover. When the sun comes out it becomes a mini-greenhouse.
Battery voltage = 3.4 V
Last read – 2022-08-12 18:10:17
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| Pressure | Temperature | Humidity | Light Intensity |
| 1022.2 mb | 20.9 °C | 46.4 % | 8617.0 lux |
| Pressure (mb) | Temperature (°C) | Humidity (%) | Light (lux) | Date/Time |
|---|---|---|---|---|
| 1022.9 | 20.5 | 42.8 | 2741.8 | 2022-08-11 18:20:08 |
| 1023.0 | 20.5 | 42.6 | 3133.4 | 2022-08-11 18:34:24 |
| 1023.2 | 19.6 | 43.2 | 1762.6 | 2022-08-11 18:48:42 |
| 1023.1 | 19.5 | 43.2 | 2937.6 | 2022-08-11 19:02:56 |
| 1023.2 | 19.5 | 43.4 | 2350.1 | 2022-08-11 19:17:12 |
| 1023.2 | 19.8 | 43.3 | 2741.8 | 2022-08-11 19:31:30 |
| 1023.3 | 19.4 | 43.7 | 1370.9 | 2022-08-11 19:45:46 |
| 1023.5 | 18.9 | 44.1 | 783.4 | 2022-08-11 20:00:04 |
| 1023.7 | 18.4 | 44.3 | 538.6 | 2022-08-11 20:14:20 |
| 1023.9 | 18.0 | 44.5 | 489.6 | 2022-08-11 20:28:38 |
| 1023.9 | 17.7 | 44.7 | 244.8 | 2022-08-11 20:42:55 |
| 1024.0 | 17.4 | 44.9 | 85.7 | 2022-08-11 20:57:12 |
| 1024.2 | 17.3 | 45.1 | 36.7 | 2022-08-11 21:11:29 |
| 1024.4 | 17.0 | 45.2 | 15.3 | 2022-08-11 21:25:48 |
| 1024.6 | 16.8 | 45.3 | 2.3 | 2022-08-11 21:40:04 |
| 1024.7 | 16.6 | 45.5 | 0.0 | 2022-08-11 21:54:16 |
| 1024.8 | 16.5 | 45.7 | 0.0 | 2022-08-11 22:08:36 |
| 1024.8 | 16.3 | 45.7 | 0.0 | 2022-08-11 22:22:51 |
| 1024.9 | 16.1 | 45.8 | 0.0 | 2022-08-11 22:37:08 |
| 1025.0 | 15.9 | 46.0 | 0.0 | 2022-08-11 22:51:25 |
| 1025.1 | 15.9 | 46.2 | 0.0 | 2022-08-11 23:05:42 |
| 1025.2 | 15.8 | 46.3 | 0.0 | 2022-08-11 23:20:00 |
| 1025.2 | 15.7 | 46.4 | 0.0 | 2022-08-11 23:34:19 |
| 1025.3 | 15.7 | 46.6 | 0.0 | 2022-08-11 23:48:35 |
| 1025.3 | 15.6 | 46.7 | 0.0 | 2022-08-12 00:02:50 |
| 1025.3 | 15.6 | 46.9 | 0.0 | 2022-08-12 00:17:08 |
| 1025.3 | 15.4 | 47.0 | 0.0 | 2022-08-12 00:31:29 |
| 1025.3 | 15.2 | 47.1 | 0.0 | 2022-08-12 00:45:43 |
| 1025.3 | 15.0 | 47.3 | 0.0 | 2022-08-12 00:59:58 |
| 1025.3 | 14.9 | 47.4 | 0.0 | 2022-08-12 01:14:15 |
| 1025.4 | 14.8 | 47.5 | 0.0 | 2022-08-12 01:28:34 |
| 1025.4 | 14.8 | 47.6 | 0.0 | 2022-08-12 01:42:49 |
| 1025.4 | 14.7 | 47.8 | 0.0 | 2022-08-12 01:57:08 |
| 1025.4 | 14.6 | 47.9 | 0.0 | 2022-08-12 02:11:25 |
| 1025.4 | 14.6 | 48.0 | 0.0 | 2022-08-12 02:25:44 |
| 1025.4 | 14.6 | 48.1 | 0.0 | 2022-08-12 02:40:01 |
| 1025.4 | 14.6 | 48.2 | 0.0 | 2022-08-12 02:54:18 |
| 1025.3 | 14.6 | 48.4 | 0.0 | 2022-08-12 03:08:36 |
| 1025.3 | 14.6 | 48.5 | 0.0 | 2022-08-12 03:22:54 |
| 1025.2 | 14.5 | 48.6 | 0.0 | 2022-08-12 03:37:13 |
| 1025.2 | 14.6 | 48.8 | 0.0 | 2022-08-12 03:51:31 |
| 1025.1 | 14.6 | 48.9 | 0.0 | 2022-08-12 04:05:50 |
| 1025.1 | 14.6 | 49.0 | 0.0 | 2022-08-12 04:20:08 |
| 1025.0 | 14.5 | 49.1 | 0.0 | 2022-08-12 04:34:25 |
| 1024.9 | 14.5 | 49.2 | 0.0 | 2022-08-12 04:48:43 |
| 1024.9 | 14.4 | 49.4 | 3.1 | 2022-08-12 05:03:01 |
| 1024.8 | 14.3 | 49.5 | 15.3 | 2022-08-12 05:17:19 |
| 1024.9 | 14.3 | 49.7 | 49.0 | 2022-08-12 05:31:37 |
| 1024.8 | 14.2 | 49.7 | 269.3 | 2022-08-12 05:45:54 |
| 1024.8 | 14.1 | 49.7 | 391.7 | 2022-08-12 06:00:12 |
| 1025.0 | 14.1 | 49.8 | 636.5 | 2022-08-12 06:14:30 |
| 1025.0 | 14.3 | 49.8 | 881.3 | 2022-08-12 06:28:48 |
| 1025.0 | 14.3 | 49.9 | 783.4 | 2022-08-12 06:43:08 |
| 1025.1 | 14.2 | 49.8 | 1468.8 | 2022-08-12 06:57:23 |
| 1025.1 | 14.3 | 49.5 | 2741.8 | 2022-08-12 07:11:42 |
| 1025.1 | 14.7 | 49.5 | 1958.4 | 2022-08-12 07:26:05 |
| 1025.2 | 15.1 | 49.5 | 2937.6 | 2022-08-12 07:40:20 |
| 1025.2 | 15.2 | 49.5 | 2937.6 | 2022-08-12 07:54:38 |
| 1025.3 | 15.2 | 49.5 | 2741.8 | 2022-08-12 08:08:56 |
| 1025.3 | 15.3 | 49.4 | 3525.1 | 2022-08-12 08:23:14 |
| 1025.2 | 16.1 | 49.1 | 5091.8 | 2022-08-12 08:37:31 |
| 1025.1 | 16.9 | 48.5 | 7050.2 | 2022-08-12 08:51:51 |
| 1025.1 | 17.4 | 48.2 | 5875.2 | 2022-08-12 09:06:12 |
| 1025.1 | 17.5 | 48.5 | 5875.2 | 2022-08-12 09:20:31 |
| 1025.1 | 17.5 | 48.3 | 6266.9 | 2022-08-12 09:34:49 |
| 1025.0 | 17.9 | 48.2 | 7050.2 | 2022-08-12 09:49:08 |
| 1024.9 | 18.5 | 47.9 | 7833.6 | 2022-08-12 10:03:27 |
| 1024.8 | 18.8 | 47.7 | 8617.0 | 2022-08-12 10:17:46 |
| 1024.8 | 18.3 | 48.2 | 6266.9 | 2022-08-12 10:32:05 |
| 1024.8 | 18.1 | 48.6 | 6266.9 | 2022-08-12 10:46:21 |
| 1024.8 | 18.0 | 48.7 | 7833.6 | 2022-08-12 11:00:39 |
| 1024.8 | 18.3 | 48.5 | 7833.6 | 2022-08-12 11:14:58 |
| 1024.6 | 19.2 | 47.7 | 9400.3 | 2022-08-12 11:29:19 |
| 1024.4 | 20.3 | 46.9 | 14100.5 | 2022-08-12 11:43:38 |
| 1024.1 | 23.9 | 44.5 | 17233.9 | 2022-08-12 11:58:07 |
| 1024.0 | 24.3 | 44.9 | 14100.5 | 2022-08-12 12:12:30 |
| 1023.9 | 23.5 | 45.0 | 14100.5 | 2022-08-12 12:26:48 |
| 1023.8 | 23.0 | 45.1 | 14100.5 | 2022-08-12 12:41:06 |
| 1023.7 | 23.3 | 45.2 | 14100.5 | 2022-08-12 12:55:26 |
| 1023.4 | 25.0 | 43.6 | 18800.6 | 2022-08-12 13:09:49 |
| 1023.5 | 24.0 | 44.8 | 12533.8 | 2022-08-12 13:24:09 |
| 1023.5 | 22.7 | 45.5 | 14100.5 | 2022-08-12 13:38:22 |
| 1023.1 | 25.1 | 43.2 | 21934.1 | 2022-08-12 13:52:48 |
| 1023.1 | 24.5 | 44.5 | 15667.2 | 2022-08-12 14:07:04 |
| 1023.1 | 24.3 | 45.0 | 14100.5 | 2022-08-12 14:21:24 |
| 1023.0 | 25.6 | 44.1 | 20367.4 | 2022-08-12 14:35:42 |
| 1022.8 | 27.7 | 42.3 | 21934.1 | 2022-08-12 14:50:06 |
| 1022.8 | 27.4 | 43.0 | 18800.6 | 2022-08-12 15:04:23 |
| 1022.7 | 26.8 | 43.5 | 15667.2 | 2022-08-12 15:18:42 |
| 1022.7 | 26.2 | 43.9 | 12533.8 | 2022-08-12 15:33:00 |
| 1022.7 | 25.5 | 44.5 | 14100.5 | 2022-08-12 15:47:17 |
| 1022.6 | 26.5 | 43.8 | 14100.5 | 2022-08-12 16:01:42 |
| 1022.5 | 25.1 | 45.6 | 10967.0 | 2022-08-12 16:15:55 |
| 1022.5 | 24.5 | 45.6 | 12533.8 | 2022-08-12 16:30:12 |
| 1022.4 | 24.8 | 45.5 | 10967.0 | 2022-08-12 16:44:31 |
| 1022.4 | 25.2 | 44.6 | 12533.8 | 2022-08-12 16:58:50 |
| 1022.3 | 25.0 | 44.5 | 15667.2 | 2022-08-12 17:13:07 |
| 1022.0 | 29.7 | 41.1 | 18800.6 | 2022-08-12 17:27:49 |
| 1022.1 | 27.4 | 42.5 | 20367.4 | 2022-08-12 17:41:59 |
| 1022.2 | 22.4 | 45.8 | 7833.6 | 2022-08-12 17:56:04 |
| 1022.2 | 20.9 | 46.4 | 8617.0 | 2022-08-12 18:10:17 |