{"id":1177,"date":"2025-01-02T22:46:15","date_gmt":"2025-01-03T04:46:15","guid":{"rendered":"https:\/\/thecweb.com\/?p=1177"},"modified":"2025-01-02T22:46:57","modified_gmt":"2025-01-03T04:46:57","slug":"dht22-is-logging","status":"publish","type":"post","link":"https:\/\/thecweb.com\/index.php\/2025\/01\/02\/dht22-is-logging\/","title":{"rendered":"DHT22 is logging"},"content":{"rendered":"\n

For my indoor garden I wanted to monitor the temperature inside and outside the tent. It is in the basement, which I don’t think ever gets above 70 or below 50, but to control the plant’s cycles I need to control light and temp. The light came with an App so I just needed to get temp data into my database. Here is the code I’m using at the moment. I’d also like to log outside temperature data, but I haven’t figured that out yet. I’m think there has got to be an API for the NWS that I can put in a zip code and get the temp and humidity. Here is the code, and some notes.<\/p>\n\n\n\n

\"\"<\/figure>\n\n\n\n

We need to get some libraries and connect to the sensors.<\/p>\n\n\n\n

\"\"<\/figure>\n\n\n\n

I have two functions. One to get the data from the sensors, and one to insert the data into the database.<\/p>\n\n\n\n

\"\"
sensors<\/figcaption><\/figure>\n\n\n\n
\"\"
insert data<\/figcaption><\/figure>\n\n\n\n

Where the magic happens<\/p>\n\n\n\n

\"\"<\/figure>\n\n\n\n

and some cleanup<\/p>\n\n\n\n

\"\"<\/figure>\n\n\n\n

So I calculated the space needed by putting 10 readings in the db, and if the average holds(which it should only go down) I will use about 840 MB a year to get a reading every minute, which I don’t really think I would need, so I’ll probably lower it to once an hour maybe later.<\/p>\n\n\n\n

\"\"<\/figure>\n\n\n\n

1638 average row size, in bytes(i think)<\/p>\n\n\n\n

so 1.6kb a reading.<\/p>\n\n\n\n

60 minutes * 24 hours * 1.6kb = 2,304kb a day<\/p>\n\n\n\n

2.3MB * 365 = 839.5MB a year<\/p>\n","protected":false},"excerpt":{"rendered":"

For my indoor garden I wanted to monitor the temperature inside and outside the tent. It is in the basement, which I don’t think ever gets above 70 or below 50, but to control the plant’s cycles I need to control light and temp. The light came with an App so I just needed to […]<\/p>\n","protected":false},"author":1,"featured_media":1185,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[14,49,48,50,45],"class_list":["post-1177","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-uncategorized","tag-linux","tag-mariadb","tag-mysql","tag-pi","tag-python"],"_links":{"self":[{"href":"https:\/\/thecweb.com\/index.php\/wp-json\/wp\/v2\/posts\/1177","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/thecweb.com\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/thecweb.com\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/thecweb.com\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/thecweb.com\/index.php\/wp-json\/wp\/v2\/comments?post=1177"}],"version-history":[{"count":1,"href":"https:\/\/thecweb.com\/index.php\/wp-json\/wp\/v2\/posts\/1177\/revisions"}],"predecessor-version":[{"id":1186,"href":"https:\/\/thecweb.com\/index.php\/wp-json\/wp\/v2\/posts\/1177\/revisions\/1186"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/thecweb.com\/index.php\/wp-json\/wp\/v2\/media\/1185"}],"wp:attachment":[{"href":"https:\/\/thecweb.com\/index.php\/wp-json\/wp\/v2\/media?parent=1177"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/thecweb.com\/index.php\/wp-json\/wp\/v2\/categories?post=1177"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/thecweb.com\/index.php\/wp-json\/wp\/v2\/tags?post=1177"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}