{"id":11333,"date":"2019-07-05T18:11:50","date_gmt":"2019-07-05T16:11:50","guid":{"rendered":"https:\/\/hesmid.nl\/test\/?p=11333"},"modified":"2019-07-05T18:11:52","modified_gmt":"2019-07-05T16:11:52","slug":"watering-plants-with-a-raspberry-pi","status":"publish","type":"post","link":"https:\/\/hesmid.nl\/test\/watering-plants-with-a-raspberry-pi\/","title":{"rendered":"Watering plants with a Raspberry Pi"},"content":{"rendered":"\n

Ask HN: What do you do with your Raspberry Pi?<\/a><\/p>\n\n\n\n

Plant watering<\/h3>\n\n\n\n

The pi runs a reddit bot that reads the \nvotes, and can switch on a pump to water. It also collects data about \nsunlight, moisture, temp and humidity to help inform the decision about \nwatering. Despite many people’s preconceptions about the goodness of the\n internet, I must admit that they do a wonderful job caring for my \nplant!<\/p>\n\n\n\n

website: http:\/\/www.takecareofmyplant.com<\/a><\/p>\n\n\n\n

subreddit w\/ voting: http:\/\/old.reddit.com\/r\/takecareofmyplant<\/a> (also has a lot of info if you want to do it yourself) <\/p>\n\n\n\n

Similar project: <\/strong><\/p>\n\n\n\n

Raspberry pi is automatically uploading video of each watering to YouTube (https:\/\/www.youtube.com\/channel\/UCtl442fLi6KAOowkw_w83rA\/vid…<\/a>) and informing me with summary (incl. watering duration, soil moisture level, temperature, humidity, light level etc.).<\/p>\n\n\n\n

\nI’m using a cheap submersible water pump controlled via relay by a python script running on raspberry pi.\nWater pump is connected to a clear vinyl tube for water distribution to the plant.<\/p>\n\n\n\n

Availability of water level at source is checked by a non-contact liquid level sensor.<\/p>\n\n\n\n

Triggers\n for watering plant are defined as follows:\n1. There is water in tank \/ source (checked by non-contact liquid level \nsensor)\n2. Soil moisture level is below certain threshold (measured by 2 soil \nmoisture capacity sensors embedded in the plant)\n3. Watering duration is determined by current soil moisture level; \nPython script activates relay to run the pump for the right duration. \n4. Same python script also:\n– activates camera to record watering (+2s buffer to have all on the \nvideo) via usb cam connected to the pi (leveraging opencv lib) \n– uploads recorded video automatically to youtube channel (if pi has \ninternet connection)\n– summarizes watering event and sends me notification with link to the \nrecording and other helpful stats (temp, humidity, moisture level etc.)\n– saves all metrics to sqllite db for future reference<\/p>\n\n\n\n

Key parts I ended up using for the project:\n1. Water pump: https:\/\/www.amazon.com\/gp\/product\/B01LWXV7DE\/ref=ppx_yo_dt_b…<\/a><\/p>\n\n\n\n

2. Non-contact Liquid Level Sensor -XKC-Y25-NPN: https:\/\/www.amazon.com\/gp\/product\/B07D3246BH\/ref=ppx_yo_dt_b…<\/a><\/p>\n\n\n\n

3. Gikfun Capacitive Soil Moisture Sensor: https:\/\/www.amazon.com\/gp\/product\/B07H3P1NRM\/ref=ppx_yo_dt_b…<\/a><\/p>\n\n\n\n

4. Relay: https:\/\/www.amazon.com\/KeeYees-Channel-Indicator-Arduino-Ras…<\/a> (though I just bought my when visiting Fry’s)<\/p>\n\n\n\n

<\/p>\n\n\n\n

<\/p>\n","protected":false},"excerpt":{"rendered":"

Ask HN: What do you do with your Raspberry Pi? Plant watering The pi runs a reddit bot that reads the votes, and can switch on a pump to water. It also collects data about sunlight, moisture, temp and humidity to help inform the decision about watering. Despite many people’s preconceptions about the goodness of […]<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[309,146],"tags":[500,298,260],"acf":[],"_links":{"self":[{"href":"https:\/\/hesmid.nl\/test\/wp-json\/wp\/v2\/posts\/11333"}],"collection":[{"href":"https:\/\/hesmid.nl\/test\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/hesmid.nl\/test\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/hesmid.nl\/test\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/hesmid.nl\/test\/wp-json\/wp\/v2\/comments?post=11333"}],"version-history":[{"count":1,"href":"https:\/\/hesmid.nl\/test\/wp-json\/wp\/v2\/posts\/11333\/revisions"}],"predecessor-version":[{"id":11337,"href":"https:\/\/hesmid.nl\/test\/wp-json\/wp\/v2\/posts\/11333\/revisions\/11337"}],"wp:attachment":[{"href":"https:\/\/hesmid.nl\/test\/wp-json\/wp\/v2\/media?parent=11333"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/hesmid.nl\/test\/wp-json\/wp\/v2\/categories?post=11333"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/hesmid.nl\/test\/wp-json\/wp\/v2\/tags?post=11333"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}