{"id":1161,"date":"2024-12-24T18:42:12","date_gmt":"2024-12-25T00:42:12","guid":{"rendered":"https:\/\/thecweb.com\/?p=1161"},"modified":"2024-12-24T18:42:12","modified_gmt":"2024-12-25T00:42:12","slug":"python-interface-to-kasa-devices","status":"publish","type":"post","link":"https:\/\/thecweb.com\/index.php\/2024\/12\/24\/python-interface-to-kasa-devices\/","title":{"rendered":"Python interface to Kasa Devices"},"content":{"rendered":"\n

The starting point for this project is the Kasa powerstrip I posted about, like a month ago. I’m trying o code up something to log power levels directly to a mysql db.<\/p>\n\n\n\n

Python Kasa library<\/a><\/p>\n\n\n\n

Python MySQL library<\/a><\/p>\n\n\n\n

Both seem to have good documentation on how to use them.<\/p>\n\n\n\n

The kasa library requires asyncio, which I haven’t really messed with async programing before, so I get to learn some new concepts. Though what little I know tells me it’s just a way to keep a connection open while waiting on the other end to respond.<\/p>\n\n\n\n

\n

asyncio is a library to write concurrent<\/strong> code using the async\/await<\/strong> syntax.<\/p>\n\n\n\n

asyncio is used as a foundation for multiple Python asynchronous frameworks that provide high-performance network and web-servers, database connection libraries, distributed task queues, etc.<\/p>\nhttps:\/\/docs.python.org\/3\/library\/asyncio.html<\/a><\/cite><\/blockquote>\n\n\n\n

This is really all I need to know, I think.<\/p>\n\n\n\n

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

I’ve slapped together this to print the data I want with python<\/p>\n\n\n\n

import asyncio\nfrom kasa import Discover\n\nasync def main():\n    dev = await Discover.discover_single(\"powerstrip.lan\")\n    await dev.update()\n\n        # possible features:\n        # state\n        # rssi\n        # on_since\n        # reboot\n        # led\n        # cloud_connection\n        # current_consumption\n        # consumption_today\n        # consumption_this_month\n        # consumption_total\n        # voltage\n        # current\n   \n    state = dev.features.get(\"state\")\n    voltage = dev.features.get(\"voltage\")\n    current = dev.features.get(\"current\")\n    current_consumption = dev.features.get(\"current_consumption\")\n    consumption_this_month = dev.features.get(\"consumption_this_month\")\n    consumption_today = dev.features.get(\"consumption_today\")\n\n    # open file and write values\n    f = open(\"power.txt\", \"w\")\n    f.write(f'Power On: {state.value}<br>{voltage.value} V {current.value} A {current_consumption.value} W<br>Today: {consumption_today.value} kwh<br>This Month: {consumption_this_month.value} kwh')\n    \nif __name__ == \"__main__\":\n    asyncio.run(main())<\/code><\/pre>\n\n\n\n
Which gives me this in WordPress:<\/p>\n\n\n\n
\"\"<\/figure>\n\n\n\n
Not directly of course, I haven’t gotten that far yet.  For now, the python writes a text file with HTML tags for display.  I have an hourly cron job that uses scp to copy the file over to \/var\/www, and then some php in my functions.php file to load the file, and display it as a wordpress shortcode.<\/p>\n\n\n\n
The stupid WordPress part took the longest, but I understand the layout of wordpress a little better.  It has been around and popular for so long, that it is easy finding well written documentation, but I’ve found that a lot of it is outdated.  It is very annoying to read through something, try it out, and then find your error is because you’re trying to use a deprecated feature.  <\/p>\n\n\n\n
The vision is a cron job that runs a python script to import data directly into the DB, and then php pulls the data from the DB, but the next step is to just get something into to DB.<\/p>\n","protected":false},"excerpt":{"rendered":"
The starting point for this project is the Kasa powerstrip I posted about, like a month ago. I’m trying o code up something to log power levels directly to a mysql db. Python Kasa library Python MySQL library Both seem to have good documentation on how to use them. The kasa library requires asyncio, which […]<\/p>\n","protected":false},"author":1,"featured_media":1162,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[14,45],"class_list":["post-1161","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-uncategorized","tag-linux","tag-python"],"_links":{"self":[{"href":"https:\/\/thecweb.com\/index.php\/wp-json\/wp\/v2\/posts\/1161","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=1161"}],"version-history":[{"count":2,"href":"https:\/\/thecweb.com\/index.php\/wp-json\/wp\/v2\/posts\/1161\/revisions"}],"predecessor-version":[{"id":1166,"href":"https:\/\/thecweb.com\/index.php\/wp-json\/wp\/v2\/posts\/1161\/revisions\/1166"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/thecweb.com\/index.php\/wp-json\/wp\/v2\/media\/1162"}],"wp:attachment":[{"href":"https:\/\/thecweb.com\/index.php\/wp-json\/wp\/v2\/media?parent=1161"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/thecweb.com\/index.php\/wp-json\/wp\/v2\/categories?post=1161"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/thecweb.com\/index.php\/wp-json\/wp\/v2\/tags?post=1161"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}