In the past I have had a feeling my Fine Offset weather station has not been recording all of our rainfall. Then when we had a storm today, my weather station recorded about 5mm less than my manual weather gauge so I knew I’d better look into it. I knew that the weewx software had limits set for various readings to eliminate spurious readings so I thought I’d start there. I couldn’t find anything that made sense though.<\/p>
Time for Google! I eventually found an obscure reference to\u00a0max_rain_rate in the file fousb.py having a maximum rate to stop strange readings which the Fine Offset stations are apparently prone to. The default is 24cm\/hr so any\u00a0rainfall\u00a0over this is ignored.<\/p>
All of my data for the day was still in the console so I disconnected it from the Raspberry Pi and plugged it into a Cumulus setup on my laptop and downloaded the data. I found one entry at a rate of 288mm\/hr or 28.8cm\/hour. This started to make sense. Obviously the location\u00a0the weewx software is written doesn’t experience the downpours SE Qld is prone to in our summer storms. A bit more googling\u00a0\u00a0and checking out the comments in fousb.py and I had the answer. I had to enter some code in the setup file weewx.conf to override the default.<\/p>\n
\r\n##############################################################################\r\n\r\n[FineOffsetUSB]\r\n # This section is for the Fine Offset series of weather stations.\r\n \r\n # The station model, e.g., WH1080, WS1090, WS2080, WH3081\r\n model = WH1080\r\n \r\n # The polling mode can be PERIODIC or ADAPTIVE\r\n polling_mode = PERIODIC\r\n \r\n # How often to poll the station for data, in seconds\r\n polling_interval = 60\r\n \r\n # The pressure calibration offset, in hPa (millibars)\r\n pressure_offset = 0\r\n\t\r\n\tmax_rain_rate = 36 # cm\/hr, default is 24, changed because heavy rain not being measured.\r\n \r\n # The driver to use:\r\n driver = weewx.drivers.fousb\r\n\r\n##############################################################################\r\n<\/pre>\n","protected":false},"excerpt":{"rendered":"In the past I have had a feeling my Fine Offset weather station has not been recording all of our rainfall. Then when we had a storm today, my weather station recorded about 5mm less than my manual weather gauge so I knew I’d better look into it. I knew […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"jetpack_post_was_ever_published":false,"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_publicize_message":"","jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":false,"jetpack_social_options":{"image_generator_settings":{"template":"highway","default_image_id":0,"font":"","enabled":false},"version":2}},"categories":[8],"tags":[],"class_list":["post-4","post","type-post","status-publish","format-standard","hentry","category-weewx"],"jetpack_publicize_connections":[],"jetpack_featured_media_url":"","jetpack_sharing_enabled":true,"jetpack_shortlink":"https:\/\/wp.me\/p5uBIO-4","_links":{"self":[{"href":"https:\/\/stevoz.com\/myweatherblog\/wp-json\/wp\/v2\/posts\/4","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/stevoz.com\/myweatherblog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/stevoz.com\/myweatherblog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/stevoz.com\/myweatherblog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/stevoz.com\/myweatherblog\/wp-json\/wp\/v2\/comments?post=4"}],"version-history":[{"count":1,"href":"https:\/\/stevoz.com\/myweatherblog\/wp-json\/wp\/v2\/posts\/4\/revisions"}],"predecessor-version":[{"id":5,"href":"https:\/\/stevoz.com\/myweatherblog\/wp-json\/wp\/v2\/posts\/4\/revisions\/5"}],"wp:attachment":[{"href":"https:\/\/stevoz.com\/myweatherblog\/wp-json\/wp\/v2\/media?parent=4"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/stevoz.com\/myweatherblog\/wp-json\/wp\/v2\/categories?post=4"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/stevoz.com\/myweatherblog\/wp-json\/wp\/v2\/tags?post=4"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}