{"id":66,"date":"2018-04-03T21:41:01","date_gmt":"2018-04-03T21:41:01","guid":{"rendered":"http:\/\/bvm.stjohncable.com\/?page_id=66"},"modified":"2024-09-27T11:36:30","modified_gmt":"2024-09-27T18:36:30","slug":"weather-station","status":"publish","type":"page","link":"https:\/\/unixwizardry.com\/index.php\/weather-station\/","title":{"rendered":"Weather Station"},"content":{"rendered":"\t\t
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Some History of This Project<\/strong><\/span><\/p>

Ever since I was a kid, I’ve been fascinated by the weather.\u00a0 For a LONG time now, I’ve been working on a weather station to be able to measure weather data.\u00a0 \u00a0After pricing the various commercial weather stations, e,g. Davis,<\/span> I found they were pretty much beyond my means for home and hobby use.\u00a0 Fortunately, many moons ago, I acquired a weather station made by MetOne Instruments that was going to be tossed (!).\u00a0 \u00a0The equipment is now somewhat obsolete, but it’s has been a great vehicle for learning programming using different languages: originally learning about 8051 assembly language, and now C++.\u00a0 I thought developing weather station software based this chip in assembly language would be a fun learning project.\u00a0 Yeah, I know I could have bought one and had it over with, but this was a challenge.\u00a0 I did get the 8051 to bit-bang an I\/O pin to get the 1-wire search algorithm to work for finding 1-wire devices on the 1-wire microLAN<\/em>, but doing all the other stuff in assembly would be pretty much insane!\u00a0 So, I gave up on basing it on assembly language.\u00a0 Sun Microsystems (now Oracle) Java Micro Edition<\/strong>, on a Raspberry Pi looked very cool, but since many of the J2ME evangelists left Oracle, there basically was no support except for searching forums and such.\u00a0 When I DID find info it was pretty old or not really pertinent.\u00a0 \u00a0So, I gave up on using Java Micro Edition.\u00a0 <sigh> But I learned a LOT about Object Oriented Programming!<\/p>

So it’s been interesting…\u00a0 I might have been able to get this project done sooner except now I had to find a new way to obtain the wind direction since, for whatever reason, the “precision” potentiometer reads OPEN!\u00a0\u00a0<\/strong>Fortunately, I found an Instructables<\/em> article about using a Melexis angle sensor that uses a neodymium rare earth diametrically magnetized magnet for the wind direction.\u00a0\u00a0<\/p>

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Currently…<\/span><\/strong><\/p>

Now I’m using Visual Studio Code<\/strong> (aka VSCode<\/strong>) with the PlatformIO<\/strong> extension to write firmware for the ultra-cheap ESP8266\/8255\/ESP32 chips.\u00a0 So now I have Node-Red 2.2 and Mosquito MQTT broker (from the Debian repository) working on a Raspberry Pi accepting JSON data from the station using an Arduino PubSubClient<\/a> and ArduinoJSON<\/a>.\u00a0 Have to say the Node-RED dashboard so far looks pretty nice.\u00a0 \u00a0I modified existing code for the DS2482 1-Wire master (the original versions had a couple issues) on GitHub and released my own version<\/a>.\u00a0 So far, I have the Model 370 rain gauge counting bucket tips (using the DS2482 1-Wire master and DS2423 1-Wire counter\/memory chip), the anemometer, and humidity\/temperature from the 083B sensors.\u00a0 \u00a0<\/p>

UPDATE: <\/strong><\/em><\/span><\/p>

The wind vane was another issue: the 360 degree precision potentiometer for some reason read OPEN!\u00a0 I got the Melexis MLX90316 angle sensor working as a replacement from this\u00a0<\/em>Instructables article<\/a>.\u00a0 \u00a0So now, besides putting all the modules together, I’m learning KiCAD to build PCBs for the wind vane retrofit and the DS2423 counter mod<\/a> for the 370 rain gauge.\u00a0 \u00a0Thanks to the KiCAD forum, I have a replacement PCB for the wind vane based on this article.<\/a> \u00a0<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<\/div>\n\t\t","protected":false},"excerpt":{"rendered":"

Some History of This Project Ever since I was a kid, I’ve been fascinated by the weather.\u00a0 For a LONG time now, […]<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"class_list":["post-66","page","type-page","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/unixwizardry.com\/index.php\/wp-json\/wp\/v2\/pages\/66","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/unixwizardry.com\/index.php\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/unixwizardry.com\/index.php\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/unixwizardry.com\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/unixwizardry.com\/index.php\/wp-json\/wp\/v2\/comments?post=66"}],"version-history":[{"count":74,"href":"https:\/\/unixwizardry.com\/index.php\/wp-json\/wp\/v2\/pages\/66\/revisions"}],"predecessor-version":[{"id":1873,"href":"https:\/\/unixwizardry.com\/index.php\/wp-json\/wp\/v2\/pages\/66\/revisions\/1873"}],"wp:attachment":[{"href":"https:\/\/unixwizardry.com\/index.php\/wp-json\/wp\/v2\/media?parent=66"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}