{"id":7,"date":"2010-06-25T20:55:03","date_gmt":"2010-06-25T20:55:03","guid":{"rendered":"http:\/\/ulrichard.is-a-geek.net\/?p=7"},"modified":"2010-06-25T20:55:03","modified_gmt":"2010-06-25T20:55:03","slug":"weatherstation-problem","status":"publish","type":"post","link":"https:\/\/ulrichard.ch\/blog\/?p=7","title":{"rendered":"Weatherstation problem"},"content":{"rendered":"<p>The plan was to build a mobile weather station with an <a href=\"http:\/\/arduino.cc\">arduino<\/a>, two old windspeed sensors from the local paragliding school, a temperature sensor, a solar panel and an old cellphone.<\/p>\n<p>As the first part I wanted to read the anemometers. I got them for a bargain from <a title=\"Touch&amp;Go\" href=\"http:\/\/paragliding.ch\">Touch&amp;Go<\/a>. Only I couldn&#8217;t figure out how to read them. It was no simple switch, so I suspected a hall effect sensor. From <a title=\"Flytec\" href=\"http:\/\/flytec.ch\/sensoren.htm\">Flytec<\/a> I got a schematic how to make the circuit. On the breadboard it worked immediately, but on the PCB, I got no readings. After a bit of measuring and thinking, I added two more resistors, to have the oscillating voltage pass the reference voltage.<\/p>\n<p>Next, I started to calculate the wind direction from the two sensors for X and Y direction. Only then I realized that the windspeed alone is not enough. I would need a sign (+ or -) meaning if the wind blows from the front or back through the sensor. With only the speed I know only the angle but not which quadrant. And the quadrant is actually more important than the angle for me.<\/p>\n<p>Ideas are welcome&#8230;<\/p>\n<p><a href=\"https:\/\/ulrichard.ch\/piwigo\/index.php?\/category\/79\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/ulrichard.ch\/piwigo\/_data\/i\/upload\/2015\/11\/12\/20151112213120-0442f087-th.jpg\" width=\"150\" alt=\"Arduino proto board\" height=\"113\" \/><\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>The plan was to build a mobile weather station with an arduino, two old windspeed sensors from the local paragliding school, a temperature sensor, a solar panel and an old cellphone. As the first part I wanted to read the anemometers. I got them for a bargain from Touch&amp;Go. Only I couldn&#8217;t figure out how [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[5,6,1],"tags":[19,168,244],"class_list":["post-7","post","type-post","status-publish","format-standard","hentry","category-paragliding","category-projects","category-uncategorized","tag-arduino","tag-paragliding","tag-weather"],"_links":{"self":[{"href":"https:\/\/ulrichard.ch\/blog\/index.php?rest_route=\/wp\/v2\/posts\/7","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/ulrichard.ch\/blog\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/ulrichard.ch\/blog\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/ulrichard.ch\/blog\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/ulrichard.ch\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=7"}],"version-history":[{"count":0,"href":"https:\/\/ulrichard.ch\/blog\/index.php?rest_route=\/wp\/v2\/posts\/7\/revisions"}],"wp:attachment":[{"href":"https:\/\/ulrichard.ch\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=7"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/ulrichard.ch\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=7"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/ulrichard.ch\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=7"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}