{"id":368,"date":"2021-04-10T11:37:29","date_gmt":"2021-04-10T11:37:29","guid":{"rendered":"https:\/\/andrejacobs.org\/?p=368"},"modified":"2022-04-11T20:22:59","modified_gmt":"2022-04-11T20:22:59","slug":"100-days-of-learning-day-32-testing-a-new-grow-hat-mini","status":"publish","type":"post","link":"https:\/\/andrejacobs.org\/100-days-challenge\/100-days-of-learning-day-32-testing-a-new-grow-hat-mini\/","title":{"rendered":"100 Days of Learning: Day 32 \u2013 Testing a new Grow HAT Mini"},"content":{"rendered":"\n<div class=\"wp-block-jetpack-markdown\"><p>Here is <a href=\"https:\/\/github.com\/andrejacobs\/100DayChallenges\/blob\/main\/2021%20March\/100DaysOfLearning\/Week5\/Week5.md\">Week 5 of my log book<\/a>.<\/p>\n<ul>\n<li>See <a href=\"https:\/\/andrejacobs.org\/100-days-challenge\/100-days-of-learning-day-33-pumping-water-with-the-pimoroni-grow-hat-mini\/\">Day 33<\/a> for how I set up a test rig to test the water pumps.<\/li>\n<\/ul>\n<h2>Time for Round 2 with Grow HAT Mini<\/h2>\n<p>I ordered another <a href=\"https:\/\/shop.pimoroni.com\/products\/grow?variant=32208365486163\">Grow Kit<\/a> while waiting for Pimoroni&#8217;s support team to come back to me on the issues I am facing with the other unit. Also the Easter special discount of 20% off was still on at the time.<\/p>\n<p>I also ordered another <a href=\"https:\/\/shop.pimoroni.com\/products\/raspberry-pi-zero-wh-with-pre-soldered-header\">Raspberry Pi Zero WH<\/a> (the one with pre-soldered headers) because you can never have too many of these awesome little guys.<\/p>\n<p>Update: Pimoroni replied to me and said that they have not encountered this before and that it is worth trying the HAT on another Pi and even do a clean software install of the SD.<\/p>\n<p><strong>UPDATE: Pimoroni sent me a replacement Grow HAT Mini<\/strong> and I tested it on Day 36. It works as expected and shows none of the same glitches as the faulty one. They have excellent customer service and I highly recommend them.<\/p>\n<h3>Assembly<\/h3>\n<p>Attached the Grow HAT Mini directly onto the Raspberry Pi Zero W without the M2.5 stand offs. Again just like before I am being super careful and discharged myself from any potential anti-static build up. What can I say, I am paranoid.<\/p>\n<p>I took the same SD card used in the other unit and inserted it into the Raspberry Pi.<\/p>\n<p>Connected the same soil moisture sensor from the other unit and the power supply. Time to boot up.<\/p>\n<h3>Booting up and running a test<\/h3>\n<p>I can use the same SSH commands etc. as what was setup on <a href=\"https:\/\/andrejacobs.org\/100-days-challenge\/100-days-of-learning-day-28-growing-plants-using-the-pimoroni-grow-hat-mini-and-a-raspberry-pi-zero-w\/\">Day 28<\/a> since the SD card stores all of the data used by the Raspberry Pi including WiFi details etc.<\/p>\n<pre><code class=\"language-bash\">$ ssh -p 8204 pi@growpi.local\npi@growpi:~ $ cd ~\/Pimoroni\/growhat\/examples\n<\/code><\/pre>\n<p>Run the monitor.py example.<\/p>\n<pre><code class=\"language-bash\">pi@growpi:... $ python3 monitor.py\n\nChannels:\nChannel: 1\nEnabled: True\nAlarm level: 0.25\nAuto water: False\nWater level: 0.5\nPump speed: 0.5\nPump time: 0.5\nDelay: 60\nWet point: 3\nDry point: 27\n\nChannel: 2\nEnabled: False\nAlarm level: 0.5\nAuto water: False\nWater level: 0.5\nPump speed: 0.5\nPump time: 0.5\nDelay: 60\nWet point: 3\nDry point: 27\n\nChannel: 3\nEnabled: False\nAlarm level: 0.4\nAuto water: False\nWater level: 0.5\nPump speed: 0.5\nPump time: 0.5\nDelay: 60\nWet point: 3\nDry point: 27\n\nSettings:\nAlarm Enabled: True\nAlarm Interval: 2.00s\n\nWARNING:root:Alarm on Channel: 1 - saturation is 4.50% (warn level 25.00%)\nWARNING:root:Alarm on Channel: 1 - saturation is 17.90% (warn level 25.00%)\nWARNING:root:Alarm on Channel: 1 - saturation is 10.20% (warn level 25.00%)\nWARNING:root:Alarm on Channel: 1 - saturation is 11.10% (warn level 25.00%)\nWARNING:root:Alarm on Channel: 1 - saturation is 18.10% (warn level 25.00%)\nWARNING:root:Alarm on Channel: 1 - saturation is 16.30% (warn level 25.00%)\nWARNING:root:Alarm on Channel: 1 - saturation is 7.40% (warn level 25.00%)\nWARNING:root:Alarm on Channel: 1 - saturation is 6.40% (warn level 25.00%)\nWARNING:root:Alarm on Channel: 1 - saturation is 16.90% (warn level 25.00%)\nWARNING:root:Alarm on Channel: 1 - saturation is 17.60% (warn level 25.00%)\nWARNING:root:Alarm on Channel: 1 - saturation is 20.50% (warn level 25.00%)\nWARNING:root:Alarm on Channel: 1 - saturation is 8.50% (warn level 25.00%)\n<\/code><\/pre>\n<p>So far so good with this new unit. I have been running it now for a few minutes and the LCD and sensor responds as I would expect. Also the buzzer has not missed a beat and sounds consistent.<\/p>\n<p>Just muted the buzzer and will let it sit in the &quot;dry&quot; state for 10 minutes before seeing if the buzzer still works and readings are taken and displayed as expected.<\/p>\n<p>In the mean time I will watch some videos about hydroponics.<\/p>\n<p>Interestingly after about 6 minutes the buzzer unmuted itself and started sounding the alarm. I tested the sensor and it does respond and the LCD does render as expected.<\/p>\n<p>Time to re-enable the other 2 sensor ports and test that as well.<\/p>\n<pre><code class=\"language-bash\"># Type Ctrl+C to stop the running monitor.py\npi@growpi:... $ sudo nano settings.yml\n\n# Set channel2 &amp; 3's enabled state to true\nchannel1: {auto_water: false, dry_point: 27, enabled: true, pump_speed: 0.5, pump_time: 0.5,\n  warn_level: 0.25, watering_delay: 60, wet_point: 3}\nchannel2: {auto_water: false, dry_point: 27, enabled: true, pump_speed: 0.5, pump_time: 0.5,\n  warn_level: 0.5, watering_delay: 60, wet_point: 3}\nchannel3: {auto_water: false, dry_point: 27, enabled: true, pump_speed: 0.5, pump_time: 0.5,\n  warn_level: 0.4, watering_delay: 60, wet_point: 3}\ngeneral: {alarm_enable: true, alarm_interval: 2}\n\n# Save and exit\n\npi@growpi:... $ python3 monitor.py\n\nChannels:\nChannel: 1\nEnabled: True\nAlarm level: 0.25\nAuto water: False\nWater level: 0.5\nPump speed: 0.5\nPump time: 0.5\nDelay: 60\nWet point: 3\nDry point: 27\n\nChannel: 2\nEnabled: True\nAlarm level: 0.5\nAuto water: False\nWater level: 0.5\nPump speed: 0.5\nPump time: 0.5\nDelay: 60\nWet point: 3\nDry point: 27\n\nChannel: 3\nEnabled: True\nAlarm level: 0.4\nAuto water: False\nWater level: 0.5\nPump speed: 0.5\nPump time: 0.5\nDelay: 60\nWet point: 3\nDry point: 27\n\nSettings:\nAlarm Enabled: True\nAlarm Interval: 2.00s\n\nWARNING:root:Alarm on Channel: 1 - saturation is 3.40% (warn level 25.00%)\nWARNING:root:Alarm on Channel: 2 - saturation is 2.70% (warn level 50.00%)\nWARNING:root:Alarm on Channel: 3 - saturation is 4.70% (warn level 40.00%)\nWARNING:root:Alarm on Channel: 1 - saturation is 18.70% (warn level 25.00%)\nWARNING:root:Alarm on Channel: 3 - saturation is 13.70% (warn level 40.00%)\nWARNING:root:Alarm on Channel: 2 - saturation is 44.10% (warn level 50.00%)\nWARNING:root:Alarm on Channel: 1 - saturation is 17.60% (warn level 25.00%)\nWARNING:root:Alarm on Channel: 3 - saturation is 5.50% (warn level 40.00%)\nWARNING:root:Alarm on Channel: 2 - saturation is 43.30% (warn level 50.00%)\nWARNING:root:Alarm on Channel: 1 - saturation is 8.00% (warn level 25.00%)\nWARNING:root:Alarm on Channel: 3 - saturation is 2.70% (warn level 40.00%)\nWARNING:root:Alarm on Channel: 2 - saturation is 24.20% (warn level 50.00%)\nWARNING:root:Alarm on Channel: 2 - saturation is 27.90% (warn level 50.00%)\nWARNING:root:Alarm on Channel: 1 - saturation is 1.70% (warn level 25.00%)\n<\/code><\/pre>\n<p>All three of the sensors are reporting and updating on the LCD as expected. Will let them sit in the dry state until the buzzer unmutes itself.<\/p>\n<p>I also ran the other examples and they worked as expected.<\/p>\n<h2>Troubleshooting the other unit<\/h2>\n<p>Ok so I have established that the new Raspberry Pi Zero and the Grow HAT Mini work with the other unit&#8217;s power supply and sensors as well as the exact same SD card and software setup.<\/p>\n<p>Now I need to establish what is faulty with the other unit.<\/p>\n<p>First I think I am going to gently remove the Grow HAT Mini and re-attach to the exact same Raspberry Pi Zero and run the software. But before doing so I have marked the working Pi and HAT with a sharpie.<\/p>\n<p>(<strong>Turned out to be a red herring\u2014&gt;<\/strong>) Ok this is very interesting. Same Raspberry Pi and Grow HAT Mini that was glitching a week ago is now seeming to be working as I would have first expected. The irony is, last week I did pull the HAT off and attached it to the GPIO pins but it resulted still in the same glitches. Fast forward a week and doing the same of detach and re-attach and now it is behaving like the working unit.<\/p>\n<p>Am I testing the faulty unit? What are the chances that I swapped the two setups? Highly unlikely because I was super careful.<\/p>\n<p>I am going to do the same &quot;dry&quot; level test with the buzzer muted until it comes back and unmutes it self. At this stage I will see if the LCD reads as expected.<\/p>\n<p>After a few minutes the buzzer unmuted and I did some tests. The sound was responding as I would expect but at first I did not notice it and thought the unit is working. After a few tests I realised that the LCD did indeed stop rendering and is stuck on the last working reading.<\/p>\n<p>Shutting down and will try again.<\/p>\n<p>Ran the unit for a good 20 minutes and I noticed that the buzzer did not unmute as expected. Also the LCD did get stuck because it is not responding to new changes in the sensor readings. Ironically I can unmute and mute the buzzer and the reading are being logged on the console as expected.<\/p>\n<p>Shutting down again and will try swapping the HAT over to the other Raspberry Pi.<\/p>\n<h3>Swapping the faulty HAT over to the working Raspberry Pi<\/h3>\n<p>I took the HAT off and attached it to the Pi that I knew was working with the other HAT.<\/p>\n<p>Booted up and time for testing.<\/p>\n<p>Nope exact same result. After a few minutes of just letting the unit sit muted. When the buzzer did unmute after about 6 minutes, the LCD is just not updating at all.<\/p>\n<p>The other weird thing is that once I switch the Raspberry Pi off (sudo shutdown -h now) the LCD was still on. Also if just lightly touch the Pi anywhere (to pick it up or so) then the LCD blinks etc.<\/p>\n<h3>Being doubtful over the working unit<\/h3>\n<p>I think I am going to do a bit more exhaustive testing on the Raspberry Pi + Grow HAT Mini combo that was working before. To ensure that I don&#8217;t have 2 faulty units.<\/p>\n<p>Did the same test of letting the software run and mute the buzzer while waiting for the buzzer to unmute and then I will touch the sensors until the buzzer stops as well as looking to see that the LCD updates as expected. I did about 6 of these tests in a row and the unit did work.<\/p>\n<h2>Last resort<\/h2>\n<p>I am going to do a fresh SD card setup and software install and do one more set of tests with the faulty unit.<\/p>\n<ul>\n<li>&#x2705; Format a different SD card.<\/li>\n<li>&#x2705; Installed Raspberry Pi OS Lite to run headless. See <a href=\"https:\/\/andrejacobs.org\/100-days-challenge\/setting-up-a-headless-raspberry-pi-zero-w-with-raspberry-pi-os-lite\/\">my guide<\/a> on how I do it.<\/li>\n<li>&#x2705; Booted and can SSH into the Pi.<\/li>\n<li>&#x2705; For a variant, I am going to NOT apt update &amp; upgrade. I am also skipping the hardening step.<\/li>\n<li>&#x2705; Shutdown and install the faulty Grow HAT Mini onto the GPIO pins.<\/li>\n<li>&#x2705; Booted and install the grow-python software. Examples = Y, Service = Y, Reboot = Y<\/li>\n<li>&#x2705; Rebooted, Did LCD turn on and start monitoring?<\/li>\n<li>&#x2705; Does it take readings and sound the buzzer?<\/li>\n<li>&#x274c; Does the LCD still update after a few minutes?<\/li>\n<\/ul>\n<h2>Conclusion<\/h2>\n<p>The first Grow HAT Mini I received is faulty. I will be in touch with Pimoroni again to relay what I have learned and ask that they replace the faulty unit.<\/p>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p> [&#8230;]<\/p>\n<p><a class=\"understrap-read-more-link\" href=\"https:\/\/andrejacobs.org\/100-days-challenge\/100-days-of-learning-day-32-testing-a-new-grow-hat-mini\/\">Read more &rarr;<\/a><\/p>\n","protected":false},"author":2,"featured_media":370,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_mi_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0,"footnotes":""},"categories":[37],"tags":[41,31],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v19.13 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>100 Days of Learning: Day 32 \u2013 Testing a new Grow HAT Mini - Andr\u00e9 Jacobs<\/title>\n<meta name=\"description\" content=\"Day 32 complete. 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