I had the need to embed a webcam image in a webpage. I did not want to stream video and did not want to view images directly on my Raspberry Pi. I wanted to take a picture every so often and upload the image onto a website. I also wanted the webpage to update with …
Our garage has a ladder sticking out near where we park our car. We want to park close to the ladder leaving enough room to walk in front of the car and also allow room behind the car for the garage door to close. A typical solution to this need, and one we’ve used in …
Replace that tennis ball with a talking Raspberry Pi! Read More »
The main operating system for Raspberry Pi, Raspbian, continues to evolve. The latest version as of August 2017 is “Raspbian Stretch” — based upon the current stable version of Debian 9. The previous version was known as “Raspbian Jessie”. One difference between versions is OpenSSL libraries. OpenSSL is a general purpose cryptography library that provides an …
The Apache Software Foundation has released CouchDB version 2.0. CouchDB 2.0, is a “distributed” version of CouchDB, a mature NoSQL, document-oriented data-store that is accessable via a RESTful JSON API. Developers can take advantage of CouchDB’s offline capability and reliable data sync for web, mobile and IoT apps at (any) scale. [NOTE: September 2017 — CouchDB …
We had a really old alarm clock in our bedroom. Really old. The LED number segments, which were a nice dim red in color, had been dying at the rate of 1 segment a year and it was getting hard to read the time. My wife finally had enough of my “I’ll get a new …
I’ve written about getting MongoDB running on the Raspberry Pi 2. View my other posts where you can get binaries (3.0.9) or learn how to compile from scratch (3.0.7). The mongo shell works great but you may want/need to code in Python, especially for device control or data logging, etc. PyMongo is a Python distribution containing …
I’ve received feedback that some folks are having problems compiling MongoDB 3.0.7 per my instructions AND it takes a long time 😉 MongoDB 3.0.9 just became available but needs quite a few changes to source in order to compile on the Raspberry Pi. I worked through MongoDB build scripts for ARCH ARM Linux and managed to …
MongoDB 3.0.9 binaries for Raspberry Pi 2 & 3 (Jessie) Read More »
I have successfully compiled MongoDB version 3.0.7 and tools on the Raspberry Pi 2. Full instructions are after the break — click on “more“. As usual I found great help from the Linux community for getting this to work on ARM7. mongo, mongod, mongos, and tools are all working great. The WiredTiger Engine does NOT work …
I had been experimenting with the world of Javascript on the server-side using Node.js. I “fell off the horse” when Node.js had an identity and direction crisis and io.js was forked. Node.js and io.js have reunited and the latest supported version is v4.2 with v5.0 just released. The latest “apt-get” version of Node.js as of 15 …
Per its website, Apache CouchDB™ is a database that uses JSON for documents, JavaScript for MapReduce indexes, and regular HTTP for its API. One of its very cool and powerful features is that you can even serve web apps directly out of CouchDB. CouchDB is available for Raspberry Pi via a simple, “apt-get install couchdb” …