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Quick Tip: HTTP GET with the ESP8266 Thing
The SparkFun ESP8266 “Thing” is one of the cheapest Internet of Things (IoT) platforms available. There are some great examples on how to post data to data.sparkfun.com, but we need to modify that code in order to pull data from a website. That is accomplished with the humble HTTP GET request. I put together a…
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Learning the Teensy LC: Input Capture
As a third step to learning the Teensy LC, I decided to tackle input capture. I discovered that there is no separate interrupt vector for input capture; it is the same vector used by the timer interrupt. This means that if we are looking for a timer overflow event as well as a pin change…
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Learning the Teensy LC: Interrupt Service Routines
As a follow-on to my PWM experiments, I wanted to create a custom interrupt service routine (ISR) in the Teensy LC. This would be similar to using the ISR() macro in an ATmega-based Arduino. Because the ARM has different vectors (and some other weird/cool things, like configurable interrupt priority levels), I knew the normal ATmega…
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Using Python and BLE to Receive Data from the RFduino
It’s should be no surprise that I enjoy working with the Edison. It may not be as easy to work with as the Raspberry Pi, but I still like it. My current project includes getting the Edison to talk Bluetooth Low Energy (BLE) to another device. The RFduino is the device in question, as I…
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Learning the Teensy LC: Manual PWM
I’m in the process of learning how to use the Teensy LC, which is the newest Arduino-compatible module from PJRC. It is built around the MKL26Z64VFT4 (ARM Cortex-M0+), which can be had for around $2.20 for 100 (according to Digi-Key). I really like the microcontroller, as it is much more powerful than the ubiquitous ATmega 328p (not…
