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Introduction to MQTT @
MQTT (Message Queuing Telemetry Transport) is a publish/subscribe messaging protocol that works on top of the TCP/IP protocol. What makes MQTT faster than say sending HTTP requests with your IoT device is MQTT messages can be as small as 2 bytes, whereas HTTP requires headers which contains a lot of information that other devices might not care about. Also, if you have multiple devices waiting for a request with HTTP, you'll need to send a POST action to each client. With MQTT, when a server receives information from one client, it will automatically distribute that information to each of the interested clients.
sparkfun  iot  internetofthings  mqtt  protocol 
26 days ago by cyberchucktx
Pi Zero USB Stem - KIT-14526 - SparkFun Electronics
The Pi Zero USB Stem is a PCB kit that turns a Raspberry Pi Zero into a USB dongle. Once the Stem is installed, your Raspberry Pi can be plugged directly into a computer or USB hub without any additional cables or power supplies. The Raspberry Pi then acts as a USB device using its own Linux kernel gadget drivers to get started.
sparkfun  usb  hat 
7 weeks ago by cyberchucktx
SparkFun Qwiic OpenLog
Serial data logger w/I2C interface; $17. Part of the SparkFun Qwiic Connect System is an ecosystem of I2C sensors, actuators, shields and cables
serial  SparkFun  Qwiic 
9 weeks ago by amoore
SparkFun LumiDrive LED Driver @ SparkFun Electronics
The LumiDrive LED Driver is SparkFun’s foray into all things Python on micro-controllers. With the SparkFun LumiDrive you will be able to control and personalize a whole strand of APA102s directly from the board itself. It feels like Arduino, but without the need to upload and compile code. Because the LumiDrive opens up like a USB drive on your computer when you plug it in and the code you write lives directly inside the drive it feels very much like an Arduino-device. The fact that you don’t need to upload and compile code makes it a great transitionary LED driver from your traditional Arduino!
sparkfun  led  lumidrive  neopixel  leds 
11 weeks ago by cyberchucktx
Serial Peripheral Interface (SPI) -

Serial Peripheral Interface (SPI) is an interface bus commonly used to send data between microcontrollers and small peripherals such as shift registers, sensors, and SD cards. It uses separate clock and data lines, along with a select line to choose the device you wish to talk to.
spi  tutorial  embedded  sparkfun 
january 2019 by bfritz
Introduction to MQTT @
In this tutorial, you’ll learn everything you need to know about the MQTT messaging protocol, why you would want to use it, and how it’s implemented. In a nutshell, MQTT uses your existing Internet home network to send messages to your IoT devices and respond to those messages.
iot  mqtt  networking  sparkfun  tutorial  messaging 
november 2018 by cyberchucktx
Distance sensing @ SparkFun Electronics
Distance and proximity sensing allow you to easily detect the whereabouts of objects without physical contact. Distance sensors (or proximity sensors) generally work by outputting a signal of some kind, (eg laser, IR LED, ultrasonic waves) and then reading how it has changed on its return. That change may be in the intensity of the returned signal, the time it takes the signal to return, etc.
sparkfun  distance  sensor  measurement  tutorial  embedded 
november 2018 by cyberchucktx
TFMini - Micro LiDAR Module (Qwiic) @ SparkFun
The TFMini is a ToF (Time of Flight) LiDAR sensor capable of measuring the distance to an object as close as 30 centimeters and as far as 12 meters! This version of the TFMini is even easier to use thanks to the addition of the included Boost Board making this micro LiDAR Module capable of connecting to SparkFun’s Qwiic Connect system.
sparkfun  lidar  qwiic  embedded  distance  measurement 
november 2018 by cyberchucktx
Singing Skulls project @ Sparkfun
Oh, that’s Halloween, so maybe something Halloween-themed.” I had a bag of plastic skulls and a box of googly eyes in my drawer. So with the help of a Teensy 3.6 and the Teensy Audio Shield, I threw this together.
sparkfun  halloween  robotics  singing  project  skulls 
november 2018 by cyberchucktx

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