{"id":2599,"date":"2020-07-26T12:49:37","date_gmt":"2020-07-26T02:49:37","guid":{"rendered":"https:\/\/jandmf.com\/?p=2599"},"modified":"2020-08-04T14:13:35","modified_gmt":"2020-08-04T04:13:35","slug":"a-neat-little-display","status":"publish","type":"post","link":"https:\/\/jandmf.com\/index.php\/2020\/07\/26\/a-neat-little-display\/","title":{"rendered":"A neat little display"},"content":{"rendered":"

A four line system monitor<\/h3>\t\t\t

Whilst doing a bit of idle web surfing I stumbled across this little gizmo<\/a> and thought that it would provide me with a few hours of amusement so I went ahead and ordered one. After it arrived it sat on my desk for a few days while we shot off to Omeo for a bit of a break for a few days.<\/p>\n

When we got back I installed it and started playing. Fortunately Adafruit have a sample python script which I was able to massage to come up with this.<\/p>\n

\"\"
Raspberry Pi 4 4GB with a heatsink case and four line display<\/figcaption><\/figure>\n

As you can see it displays the date, time, CPU temp and memory and CPU usage.<\/p>\n

I’ve already got USB booting happening so it boots from a 1TB Seagate USB 3.0 SSD which is just two partitions – “\/boot” and “\/”. That works well too.<\/p>\n<\/div>\n\t\t<\/div>

The python script<\/h3>\t\t\t

This was, or is, my first ever python script. I’m adept at Perl, COBOL, Fortran, etc. so I was able to work out a simple script with only minimal messing around. It’s a good thing that Adafruit have some detailed instructions <\/a>which include a python script to get it working. A bit of modifying \/ rewriting the Adafruit script and I had it displaying what I wanted.<\/p>\n

So, without further ado here’s here’s the Python3<\/a> script which I was going to embed here but WordPress is wilfully destroying the indentation.\u00a0 A quick look will reveal that there is no error handling whatsoever. I haven’t learnt how to do that yet so that’ll be introduced on another day. There’s also almost no commenting either.<\/p>\n

 <\/p>\n<\/div>\n\t\t<\/div>

What now<\/h3>\t\t\t

Well now that I’ve got this working and working well I thought that I’d get one of these<\/a> which has buttons and is a bigger. The little one that I have now will go onto my other P1 4 (1GB) which is used for storage and as a test bed for this site. It’s also booting from USB and is also running Pi OS 64bit which seems to me to be nice and stable.<\/p>\n

The bigger display will allow more lines of text but I don’t know what I’ll put there yet. It also has a couple of buttons and a joystick. I can use the buttons for things like “sudo reboot” or “sudo poweroff” or something.<\/p>\n

Stand by for future developments.<\/p>\n

 <\/p>\n

 <\/p>\n

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

Whilst doing a bit of idle web surfing I stumbled across this little gizmo and thought that it would provide me with a few hours of amusement so I went ahead and ordered one. After it arrived it sat on my desk for a few days while we shot off to Omeo for a bit … Continue reading “A neat little display”<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[53],"tags":[],"class_list":["post-2599","post","type-post","status-publish","format-standard","hentry","category-pi"],"post_mailing_queue_ids":[],"_links":{"self":[{"href":"https:\/\/jandmf.com\/index.php\/wp-json\/wp\/v2\/posts\/2599","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/jandmf.com\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/jandmf.com\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/jandmf.com\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/jandmf.com\/index.php\/wp-json\/wp\/v2\/comments?post=2599"}],"version-history":[{"count":17,"href":"https:\/\/jandmf.com\/index.php\/wp-json\/wp\/v2\/posts\/2599\/revisions"}],"predecessor-version":[{"id":2653,"href":"https:\/\/jandmf.com\/index.php\/wp-json\/wp\/v2\/posts\/2599\/revisions\/2653"}],"wp:attachment":[{"href":"https:\/\/jandmf.com\/index.php\/wp-json\/wp\/v2\/media?parent=2599"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/jandmf.com\/index.php\/wp-json\/wp\/v2\/categories?post=2599"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/jandmf.com\/index.php\/wp-json\/wp\/v2\/tags?post=2599"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}