Search for "Pretzel" - 12 results.

The Pretzel Board Bluething: now with Bluetooth

August 16, 2017 | by Thomas Scherer

There are already many articles, projects and videos featuring the red Pretzel board which consists of an Arduino Nano with an integrated Wi-Fi module. The popular board designed by Fabian Kainka is available from Elektor and Franzis. Now there is a Bluetooth version available... meet Bluething.

My Journey into the Cloud (10): The Pretzel Board

July 28, 2016 | by Jens Nickel

Regular readers of this sequel will already know that for my first attempts to remotely control a desk lamp I used a PC as a relay station configured as a MQTT client to receive text-based commands and forward them to a microcontroller board via the USB port. From this basic configuration the next s

My Journey into the Cloud (11); Pretzel board works as a Wi-Fi Dongle

September 25, 2016 | by Jens Nickel

In the last installment of this series I started with the Pretzel-Board which has an ATmega328 and a WiFi LAN ESP8266 chip on board. The pretzel board was just hooked up to a PC using a USB cable and with a terminal emulator program running on the PC, I am able to send simple text-based commands to

My Journey into the Cloud (12): Stand alone MQTT

October 21, 2016 | by Jens Nickel

In previous episodes I’ve spent most of my time writing PC software, it’s time now to turn our attention to some firmware. Our ultimate aim of course is to cut our ties from the clunky, power-hungry PC so we can send MQTT messages (e.g. measurement data) from smaller, more mobile devices...

Welcome to the LEARN section

September 1, 2016 | by Elektor Team

Many of you will probably remember from a previous LEARN editorial that my intention was always to try out Fabian Kainka’s ‘Pretzel Board’. This is a very interesting little development board which has all the ingredients to make it especially attractive to the maker community.

Member Download

Welcome to the LEARN section

November 1, 2016 | by Elektor Team

intros that I managed to write a small program for the PC that controls the ESP8266 WiFi chip on the Pretzel board using AT commands.

Member Download

My Journey into the Cloud (14): Replies from the MQTT server

February 9, 2017 | by Jens Nickel

In the last episode i built a small sensor board. The ATmega on the Pretzel board periodically takes a reading from a phototransistor and controls the ESP8266 using AT commands to connect to an HiveMQ test server on the internet; first via TCP/IP, then the MQTT connect request and then the MQTT

My Journey into the Cloud (13): a small sensor board

December 8, 2016 | by Jens Nickel

In the last installment of this series I ported my mini-library for publishing MQTT messages to the Pretzel board which has an ATmega328 and an ESP8266 Wi-Fi module on board. What's missing so far is any error handling mechanism. On our journey to make a stand-alone board able to communicate with

Back from Embedded World 2016

March 6, 2016 | by Jens Nickel

Embedded World Nuremburg has closed its doors for 2016 and the Elektor team have now trudged back to HQ, bags full of boards and heads filled with interesting impressions and new ideas...

My Journey into the Cloud (15): Actuator board with the ESP8266

April 20, 2017 | by Jens Nickel

In the last installment of this series, we developed a small sensor node based on the Pretzel board (equipped with an ATmega and ESP8266 WiFi chip), which transmits measurement values via MQTT to the Internet. In this installment we take a closer look at the other end of the control chain to