Skip navigation
1 2 Previous

Ralph Yamamoto's Blog

23 posts
ralphjy

LoRa Gateway Activated

Posted by ralphjy Jul 6, 2019
It has been a while since I received The Things Network (TTN) LoRa Gateway and two MKR WAN 1300 boards for winning the IoT in the Cloud challenge.  I've been busy with roadtests, but really would like to start playing with LoRa based sensors.  I checked in my local area and there are 5 gateways listed on the TTN map.  One is a Things Gateway like mine, two are homebrew (RPi/Arduino) and two are unspecified.  The closest gateway to me is about 4 km away as the crow flies.  ...
I just received my prizes for the Project14 IoT: In the Cloud Competition.  I received a 915MHz LoRaWan Gateway to the Things Network. In addition I received 2 Arduino MKR Wan 1300 boards and a MKR SD prototype shield.   Looking forward to experimenting with LoRa.  Thank you to Element14 and the Community!   Ralph     ...
I just attended the the one day NXP Technology Days conference in Seattle, WA (actually in Bellevue). It was held at the Meydenbauer Convention Center.  This is the first Tech Days conference that I've attended.   In the morning I attended an info session on the iMX 8M (multimedia) family of processors.  The Mini and the Nano are newer and the Mini is available now with the Nano coming out in 4Q of this year.   After the info session I attended a hands-on workshop for t ...
I was inspired by jomoenginer and ordered a Jetson Nano Developer Kit directly from Nvidia.  I received it a few days ago but just now had a chance to set it up.   I noticed in YouTube videos that everyone uses the 4A power supply with the barrel jack.  I guess I should have checked earlier.  The default standard power mode is 10W.   It is supposed to be marginal with the 2A micro USB jack. There is a 5W power mode that you can select that reduces the CPU and GPU ...
Since this power supply has been around since 2015, there is a lot of information about it on the Internet.  I thought some on the info that I've come across on the internals of the power supply might be of interest to others.  I don't think this info is appropriate for a road test so I'm posting it on my personal blog not the road test blog.   A couple of caveats about this info: I would not suggest that anyone open or modify their power supply as that will definitely invalidat ...
ralphjy

Phones for the Elderly

Posted by ralphjy Apr 16, 2019
I'm writing this out of frustration of trying to find a simple phone for my 96 year old mother.  Going through the aging experience with my parents, other relatives, and parents of friends, has made me realize that appliances that are designed today are much too complicated people with diminishing capability to operate.  Let me use the phone as an example.   My mother lives in Hawaii and I live in Oregon (having moved 40+ years ago for an engineering job).  My mother was liv ...
I've wanted to try using a laser cutter but haven't had the opportunity until today.  There is a campus of Portland Community College (PCC) just up the hill from me.  Spring term was the first time that they've offered Maker community education courses (3D printing and laser cutting).  I was fortunate to get into the first laser cutting class.  They have 3 laser cutters from Universal Laser Systems in their MakerLab.   They have a 60 Watt model with a work area of 3 ...
I received a notification that NXP is doing a Technology Training Day in Seattle (Bellevue), Washington on May 7. https://getregisterednow.com/NXP/Event/Register/Register.asp?e=NXPTechDaySeattle2019&r=e&elq_mid=7369&elq_cid=2769005   Has anyone attended one of these?  And anyone going to this one?   I'm down in Portland, so I'd probably need to drive up the day before and stay overnight.  I'm still debating whether to register or not.  I'm sure the worksho ...
I was very excited to try out my Oboo Smart Clock. I really wanted to demonstrate some of the features to my wife who wondered why I would back a clock on Kickstarter.  Unfortunately, the out-of-the-box experience was not very good.  The instructions included were minimal, which would have been fine if everything had functioned correctly.  They have a browser based app (not a downloadable mobile app as the instructions imply).  The app is not well designed and because the scr ...
Back in November of 2017 I decided to back a smart clock project on Kickstarter.  It was being designed by Onion using their Omega 2 IoT computer.  I bought it as an early Christmas present to myself with an estimated delivery of June 2018.  I just received it via UPS this afternoon - only 9 months late - I had almost given up on it......   Here is a link to the Kickstarter campaign: https://www.kickstarter.com/projects/onion/oboo-smart-clock-wifi-connected-and-gesture-contr ...
ralphjy

Giving Snips a Try

Posted by ralphjy Mar 16, 2019
After seeing the blog post What makes an office smart?  I decided that I should give Snips a try.  I have multiple Echo devices in my house and I have also tried Google (AIY Voice kit) but there are some circumstances where it is beneficial to keep voice interaction/control on the local network.  I currently use Alexa for voice control of a pan/tilt outdoor security IPcamera.  I'd like to retain this capability even if the Internet connection is down (I record on a local NVR ...
The project that I'm working on with the Rapid IoT requires reading information from an external NFC tag.  The Rapid IoT has the capability of reading and writing an internal NT3H2211 NFC tag, but it does not have the capability to read or write an external tag.  The simplest way to implement that is to use a Mikroelektronika Click card, but that requires adding a Click interface for the Rapid IoT.  Mikroelektronica has 3 Click expansion units in the Hexiwear product line that als ...
The MCUXpresso IDE is an Eclipse based development environment that offers more advanced editing, compiling and debugging of applications for the Rapid IoT device. In this blog post I'm going to cover generating an example program using MCUXpresso.   You need to download and install two components: 1) MCUExpresso IDE  http://www.nxp.com/MCUXpresso 2) Rapid IoT SDK  http://www.nxp.com/rapid-iot   The Rapid IoT SDK actually contains two SDKs, one for each processor in the ...
In December of 2017 I had a solar system installed at my house.  This is my first experience using solar technology.  I thought that since I've had the system running for a full year that it useful to review how well it has performed relative to my expectations.  I had previously posted the system description as part of the Heat is On Solar Project contest on Project14: https://www.element14.com/community/community/project14/solarpowerdevices/blog/2018/07/31/solar-spec-intro,  ...
NXP provides two different IDEs to develop programs for the Rapid IoT device.  The first is Rapid IoT Studio which is a graphically oriented web based Atmosphere drag-and-drop IDE.  The second is the MCUXpresso IDE which is an Eclipse based IDE for NXP's microcontrollers based on the Arm Cortex-M cores.  The second option requires that you download and install the free MCUXpresso application.  You also need to download and install the SDKs associated with the MK64F12 and MKW4 ...