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Search for "my journey" - 1857 results.

My Journey into the Cloud (9); A minimal MQTT client

June 24, 2016 | by Jens Nickel
In the previous instalments of this ongoing venture into the Internet of Things we have made use of several different open-source libraries in order to program two MQTT clients for the PC and Android smartphone. Now from a cell phone anywhere in the world we can send commands via a public MQTT broke
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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
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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 publ
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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 o
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My Journey into the Cloud (24): The ESP32 controls remote processes

April 11, 2018 | by Jens Nickel
In the last installment we built a small stand-alone device using the ESP32 Pico Kit, an RGB LED and an LDR, which we used to measure the ambient brightness level and send them to a Cloud platform. We can also send commands from the Cloud platform to control all sorts of actuators connected to our d
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My Journey into the Cloud (7); the controller in your shirt pocket

April 28, 2016 | by Jens Nickel
In the last installment we introduced a smartphone into our setup but you wouldn't describe this as a mobile control function. To achieve this we need to be able to send MQTT messages directly from an Android smartphone...
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My Journey into the Cloud (17): using an ESP32 for the actuator

July 5, 2017 | by Jens Nickel
The Pretzel board is a really useful tool especially when you are starting out with networks. Now however it was time to try out a different type of board. We took a look at the ESP32 which is the more powerful cousin of the ESP8266 with many more peripheral functions built-in...
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My Journey into the Cloud (21): The ESP32 shows signs of life

December 20, 2017 | by Jens Nickel
In the last episode, we configured the ESP32 to set up its own local Wi-Fi network. With a PC, smartphone or tablet, we are able to log into this network called ‘ESP32_MyJourneyIoT’ and request a configuration page from the ESP32 web server using a web browser. To show successful hook up we ligh
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My Journey into the Cloud (22): ESP32 sensor node with web server

January 31, 2018 | by Jens Nickel
In previous parts of this series we saw how to use a web page on a local network to configure an IoT device. In this part, we use a web page to configure a cloud access that allows us to send sensor values. These can then be accessed and viewed from anywhere in the world.
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The Journey Begins

March 10, 2015 | by Martin Cooke
The wind was set fair on Monday so Solar Impulse 2 lifted off from Abu Dhabi on the first leg of its around the world flight. The top surface of the aircraft’s 72 meter wing is fitted with 17,248 solar cells which power the four electric motors. Power from the cells is also stored in ...