As promised, I have updated the AM2315 temperature sensor “How-To” document for modern times. The changes include:
- The removal of the obsolete quickwire library that caused so much pain.
- Removing quickwire also removed the dependency on Python3.
- Added the very capable i2c library tentacle-pi written by lexruee.
- Use of the Raspian Switch OS means these instructions work on any Pi.
- Streamlined 6-Step process.
I have tested the new procedures on every Pi that I have in the drawer. This includes a Pi v1, v2, vA+, v3, and the Pi Zero. Yup – they all work using the same software and the same pinout. Sweet!
You can download the new document and test script here.
For all of you that have contacted me in the last couple of months trying to get your sensor working, I apologize for the delay in getting this document updated.
Ebon Upton announced in a blog post on September 8, 2016, that 10 million Rapsberry Pi’s have been sold. This is an incredible feat in the middle of an incredible story. The world is a better place because of people like Ebon and his dedicated team. To top it all off, Ebon is the nicest and most humble guy you could ever meet.
Congratulations and thanks for the coolest gadget of all time.
On November 26, 2015, Eben Upton and his engineering team at the Raspberry Pi Foundation announced the release of another member of the Pi family – Pi Zero. As far as I know, this is the first usable computer that runs Linux and costs $5 USD. This is an amazing accomplishment.
Rather than blog out all of the technical details, I suggest you download the latest issue of the MagPi. This is one of my favorite magazines, and the 40th issue is one of the best ever. It contains everything you need to know about the new Pi.
Cynics may argue that this Pi really does not qualify as a $5 computer since you need to invest in a couple of special cables to make is useful. Also, you need to solder in a pin header if you want to use the IO capabilities. So what? This is just another proof of Sopwith’s theorem – “If it works out of the box – what fun is that?”
The fact anyone can purchase a computer with this power at a $5 price point says it all. I suspect this device will be more popular with hackers and makers than with schools, but this remains to be seen.
Eben posted a video explaining the reasoning behind building a $5 computer. I am struck by his passion and dedication to the education of young people. His humbleness is striking.
Ol’ Sopwith has been pretty slow to warm up to the crowdfunding frenzy. My friends over at the Pi Supply Store alerted me to a pretty cool project that has it all; Pi’s, Pi cameras, nature, hacking, and young people.
I have hacked lot of projects using the Pi cam and have been on the constant lookout for a rugged case to use outdoors. Bingo.The Naturebytes Wildlife Cam Kit Project is a brilliant idea from a very passionate group of talented founders.
Take a look at this project and send a few dollars their way. Project has to be funded by July 25, 2015.
About a year ago I posted a ‘How-To‘ document describing how to connect an AM2315 temperature sensor to a Pi. I received many emails and many people posted responses to my blog entry.
One of the most interesting emails I received was from Dr. Michael Glenn, Plant Physiologist and Director of Research, at the US Department of Agriculture. Dr. Glenn was trying to solve a problem.
As we all know, global warming is an important topic today. Regardless of your personal views on the subject, the only way we will ever know the true facts about the impact of a warmer earth is to study it. Dr. Glenn and his research team do just that.
There continues to be great interest in hacking weather sensors on the Pi. A while ago I wrote a ‘How-To‘ for the AOSONG AM2315 temperature/humidity sensor that was quite popular. Today I have released another ‘How-To‘ for the AM2315’s siblings – the AM2302, DHT11, and DHT22 sensors.
I have found that experienced Pi/Linux users can get these sensors up and running in a very short time. For many hackers new to the Pi and or Linux, it is a challenging learning process, sometimes even intimidating. Sopwith’s ‘How-To‘ series are guides designed to help these folks succeed in their Pi project.
Each ‘How-To‘ includes screen shots for nearly every step of a project. Although this takes some work and makes the documents longer, I have found it is these images that help Pi enthusiasts understand each implementation step.
You can download the ‘How-To‘ below. The Zip file also contains the modified test Python script described in the document.
Post a comment if the ‘How-To‘ Series helps you with your projects. Improvements, edits, bug reports, and requests for other ‘How-To‘ topics are most welcome.
There is a kid out there who would love to help you hack your Pi.
Ol’ Sopwith was fortunate enough to order a couple of Pi 2’s before they quickly sold out. I received them on February 4th and immediately started to hack.
I did not expect this news about my new Pi’s. They are very camera shy. There is a published report on the Register UK web site that the Pi 2 does not like its picture taken. It seems that Pi 2’s will crash when you take a photo of them using a Xenon flash. How crazy is this?
I did what any good hacker would do – recreate the problem. I whipped out my trusty old Canon PowerShot A650 and took a picture of my Pi 2 when it was running a temperature sensor test suite.
Sure enough, the instant the flash went off my little Pi went to sleep. Dead sleep. Some YouTube videos show their Pi’s rebooting, mine shutdown completely. The crash did not affect my Pi; it immediately booted fine when I cycled power.
The Raspberry Pi Foundation released another new Pi last week. Officially called the Pi 2, the new changes are all about performance. The form factor is exactly the same as the B+. The big news is the use of an ARMv7 core processor that has 4 cores plus a boost of additional RAM to 1 GB. Initial reports say this Pi is 6X faster than its siblings. Wow!
Photo courtesy Adafruit via Flikr
One of the great things about the Raspberry Pi Foundation is you never know what they are going to do next. In November 2014, they released a + version of the Model A. It has the extended GPIO pins (40) of its big sister the B+. It is also smaller than any other Pi at 65mm in length.
In order to shrink the footprint, the A+ has no Ethernet port, a single USB port, and 256MB of SDRAM. This not only reduces the physical size of the device, but also the amount of power it consumes. I recently purchased an A+ with the very cool Pibow Royale enclosure. What a beautiful combination of high tech and art.
Raspberry Pi A+ with Pibow Royale enclosure (Photo courtesy Adafruit Industries on Flickr)
I am sure many folks are wondering why bother with a a Pi that is so… ‘legacy.’ For me, this is exactly what I was looking for. Small, simple, lightweight, and capable. Trying to jam the original Pi’s into security camera enclosures has been a headache for me. Not anymore.
Also, the low power requirements of the A+ make it much easier to power the device for long periods of time using batteries or solar power.
The folks at the Raspberry Pi Foundation are not only mad scientists – but geniuses as well. Tip of the hat to you all.
Stay tuned for some of the great projects I plan for this fantastic Pi.
One of the great things about living in London is the fact glossy Linux magazines are so cheap. These magazines are published in the UK and sell in stores for about 6 Quid. The same magazine in the US is $15+ due to the exchange rate and shipping costs. I buy one every chance I get.
I came across a very interesting article in the December 2014 issue of Linux Magazine titled, “Plane Spotting.” Written by Charly Kuhnast, the one-page article describes how to use a USB DVB-T device to capture airplane traffic and plot it on a Google map. What a cool idea! Ol’ Sopwith decided to purchase a DVB-T and see if it would work on the Raspberry Pi.