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 should now be more accurate as the new enclosure shades the sensor more effectively. Light intensity measurement is incorrect. The sensor is currently within the enclosure. Hopefully that will be remedied soon.

To see how the weather station was put together follow this link - Construction


Battery voltage = 3.3 V
Last read - 2024-06-21 16:18:07

Pressure Temperature Humidity Light Intensity
1004.5 mb 20.2 °C 61.7 % 11750.4 lux
Data graphed for last 24 hours
Data graphed for last 28 days
Raw data for the past 24 hours.

Pressure (mb) Temperature (°C) Humidity (%) Light (lux) Date/Time
1014.8 23.3 41.7 14100.5 2024-06-20 16:33:07
1014.7 22.5 45.0 14100.5 2024-06-20 16:47:12
1014.7 26.0 42.8 23500.8 2024-06-20 17:01:29
1014.5 27.6 39.0 12533.8 2024-06-20 17:15:41
1014.5 27.2 37.6 18800.6 2024-06-20 17:29:48
1014.3 27.4 35.8 12533.8 2024-06-20 17:43:56
1014.3 27.0 36.5 10967.0 2024-06-20 17:58:05
1014.2 26.3 37.4 10967.0 2024-06-20 18:12:11
1014.1 25.0 37.1 8617.0 2024-06-20 18:26:16
1014.0 24.8 38.0 7833.6 2024-06-20 18:40:23
1013.8 23.9 39.7 12533.8 2024-06-20 18:54:24
1013.6 23.9 38.7 5091.8 2024-06-20 19:08:33
1013.6 22.0 41.6 10967.0 2024-06-20 19:22:35
1013.5 20.9 45.2 7050.2 2024-06-20 19:36:40
1013.4 20.0 48.1 5875.2 2024-06-20 19:50:45
1013.3 19.3 51.1 3133.4 2024-06-20 20:04:51
1013.3 18.5 52.1 3525.1 2024-06-20 20:18:58
1013.2 17.8 54.3 4308.5 2024-06-20 20:33:03
1013.1 17.1 56.8 2741.8 2024-06-20 20:47:08
1013.2 16.2 59.3 2350.1 2024-06-20 21:01:13
1013.0 15.8 61.3 3133.4 2024-06-20 21:15:19
1012.9 15.6 62.8 783.4 2024-06-20 21:29:22
1012.8 15.5 63.8 587.5 2024-06-20 21:43:28
1012.6 15.2 65.2 587.5 2024-06-20 21:57:35
1012.5 14.9 66.4 220.3 2024-06-20 22:11:40
1012.5 14.8 67.5 91.8 2024-06-20 22:25:47
1012.4 14.7 68.2 27.5 2024-06-20 22:39:53
1012.2 14.6 69.0 11.5 2024-06-20 22:53:59
1011.9 14.5 69.7 3.1 2024-06-20 23:08:05
1011.7 14.5 70.4 1.5 2024-06-20 23:22:11
1011.7 14.5 71.0 0.0 2024-06-20 23:36:17
1011.4 14.5 71.4 0.0 2024-06-20 23:50:24
1011.2 14.2 73.3 0.0 2024-06-21 00:04:30
1011.2 14.0 75.0 0.0 2024-06-21 00:18:36
1011.0 13.9 76.3 0.0 2024-06-21 00:32:42
1010.8 13.9 77.1 0.0 2024-06-21 00:46:48
1010.6 13.6 77.8 0.0 2024-06-21 01:00:53
1010.6 13.6 78.2 0.0 2024-06-21 01:15:00
1010.4 13.4 79.1 0.0 2024-06-21 01:29:05
1010.3 13.6 79.5 0.0 2024-06-21 01:43:16
1010.1 13.5 79.6 0.0 2024-06-21 01:57:23
1009.8 13.3 80.6 0.0 2024-06-21 02:25:24
1009.6 13.1 81.0 0.0 2024-06-21 02:39:29
1009.4 13.2 81.4 0.0 2024-06-21 02:53:36
1009.3 13.1 81.8 0.0 2024-06-21 03:07:43
1009.1 13.4 82.2 1.5 2024-06-21 03:21:49
1008.7 13.7 82.4 9.2 2024-06-21 03:35:56
1008.5 13.7 82.6 24.5 2024-06-21 03:50:03
1008.4 13.5 82.9 61.2 2024-06-21 04:04:10
1008.1 13.8 83.5 159.1 2024-06-21 04:18:17
1008.0 13.9 83.9 293.8 2024-06-21 04:32:23
1007.9 13.9 84.0 440.6 2024-06-21 04:46:30
1008.0 13.6 84.4 685.4 2024-06-21 05:00:36
1008.0 13.6 84.7 1958.4 2024-06-21 05:14:42
1008.1 13.9 85.1 1958.4 2024-06-21 05:28:49
1008.0 14.2 84.9 2741.8 2024-06-21 05:42:57
1007.9 14.5 84.5 3916.8 2024-06-21 05:57:07
1007.9 14.6 84.1 5875.2 2024-06-21 06:11:03
1007.9 14.9 83.7 3916.8 2024-06-21 06:25:10
1007.9 15.0 83.5 7050.2 2024-06-21 06:39:15
1007.9 15.2 82.8 5091.8 2024-06-21 06:53:22
1007.8 15.2 82.6 3916.8 2024-06-21 07:07:30
1007.7 15.1 82.6 6266.9 2024-06-21 07:21:38
1007.7 15.4 82.4 7050.2 2024-06-21 07:35:44
1007.4 15.9 82.1 14100.5 2024-06-21 07:49:53
1007.4 16.6 81.6 15667.2 2024-06-21 08:04:01
1007.3 16.9 79.9 15667.2 2024-06-21 08:18:09
1007.1 16.9 79.1 11750.4 2024-06-21 08:32:16
1007.0 17.2 78.2 18800.6 2024-06-21 09:00:31
1007.0 17.5 77.5 17233.9 2024-06-21 09:14:41
1006.8 18.0 76.5 18800.6 2024-06-21 09:28:38
1006.7 18.3 75.3 20367.4 2024-06-21 09:42:46
1006.6 19.0 72.8 23500.8 2024-06-21 09:56:55
1006.5 20.3 70.4 21934.1 2024-06-21 10:11:06
1006.4 19.6 70.6 28201.0 2024-06-21 10:25:10
1006.3 19.2 70.5 14100.5 2024-06-21 10:39:16
1006.0 20.2 69.5 28201.0 2024-06-21 10:53:30
1005.8 20.9 68.2 31334.4 2024-06-21 11:07:28
1005.9 20.6 67.8 25067.5 2024-06-21 11:21:35
1005.9 19.6 69.0 10967.0 2024-06-21 11:35:41
1005.9 19.1 70.6 12533.8 2024-06-21 11:49:42
1005.8 19.5 70.7 17233.9 2024-06-21 12:03:51
1005.8 19.4 70.7 7050.2 2024-06-21 12:17:54
1005.7 18.8 71.2 7833.6 2024-06-21 12:31:59
1005.6 19.3 71.0 17233.9 2024-06-21 12:46:07
1005.5 19.5 71.2 15667.2 2024-06-21 13:00:14
1005.5 19.4 71.5 15667.2 2024-06-21 13:14:25
1005.2 21.9 67.4 31334.4 2024-06-21 13:28:36
1005.1 24.3 60.7 31334.4 2024-06-21 13:42:50
1005.0 22.9 61.6 15667.2 2024-06-21 13:56:56
1005.0 21.9 65.1 23500.8 2024-06-21 14:11:00
1004.8 21.6 65.6 17233.9 2024-06-21 14:25:06
1004.7 21.7 65.4 23500.8 2024-06-21 14:39:13
1004.7 21.0 65.5 15667.2 2024-06-21 14:53:22
1004.5 20.6 66.2 18800.6 2024-06-21 15:07:29
1004.6 20.7 65.0 17233.9 2024-06-21 15:21:37
1004.6 20.8 64.2 17233.9 2024-06-21 15:35:45
1004.7 20.8 63.2 15667.2 2024-06-21 15:49:52
1004.6 20.7 62.2 12533.8 2024-06-21 16:03:59
1004.5 20.2 61.7 11750.4 2024-06-21 16:18:07