Tag Archives: Wifi

ESP8266 Weather Station


blog.squix.ch has published there code for a ESP8266 based weather station. More details here:

It is not yet working as smoothly as I want it to work but maybe some of you can help me getting rid of the nasty issues that were bugging me for the last few weeks. The README on github contains basic setup instructions and also the currently known issues. Please feel free to fix them and create pull requests to let them flow into the master branch.

ESP8266 Weather Station – [Link]

RedBear Duo: A small and powerful Wi-Fi + BLE IoT board


A thumb-sized, Particle-powered, Cloud-connected IoT board with Wi-Fi + BLE that supports Arduino, JavaScript and soon Python too!

The Duo is a thumb-size development board designed to simplify the process of building Internet of Things (IoT) products. The Duo provides everything you need—Wi-Fi, BLE and a powerful Cloud backend, all in a compact form factor that makes it ideal for your first prototype, a finished product, and everything in between.

We’re also introducing the RBLink, an expansion board for the Duo that allows you to attach additional sensors and modules without any soldering. You’ll have all the tools you need to get your prototype up and running in no time.

RedBear Duo: A small and powerful Wi-Fi + BLE IoT board – [Link]

ESP8266 – 5$ internet connected switch


EasyIoT @ instructables.com shows us how to build an Internet connected switch using ESP8266 Wifi module and EasyIoT Cloud service.

In this tutorial we will show how to build WiFi internet connected switch connected to EasyIoT Cloud. We will use ESP8266, solid state relay and Arduino IDE. Switch can be controlled by WEB application, native Android application or button.

This internet switch is “plug and play” – it will automatically set all EasyIoT Cloud settings, so no configuration in EasyIoT Cloud is needed.

ESP8266 – 5$ internet connected switch  – [Link]

Control Loop Challenges of Wireless Systems


Automation is defined as using various control systems to operate equipment such that there is minimal human intervention. Closed control loops (feedback systems) regulate how other systems or devices behave by taking into consideration their output and making corrections based on feedback. An example of this feedback system is Progressive Automation Linear Actuators. In this article challenges of control loops in wireless systems are discussed.

Though embedded modules can be used be used with Wi-Fi, the aim of recent protocols is providing wireless networks with more focused support for control loops. For tight control loops, devices supporting the IEEE802.15.4 ZigBee standard can be used in supporting the recent protocols. Below is a Microchip’s MRF24WB Wi-Fi module.

For sharing a common medium of communication, sensors and controllers are required by a control system that is adopting wireless communication. The network’s quality is a trivial part of the functioning of the overall system when implementing a closed-loop control system using a common communication system.
Earlier short range wireless networks pose a problem since delay deadlines are not used in packet consideration and regardless of these requirements, the packets are treated the same. For a closed loop control system, this presents a major challenge since actuators influencing the system are controlled by the sensor’s data. Data delays lead to negative reinforcement, hence instead of a process being kept within close limits, it runs away. Continue reading Control Loop Challenges of Wireless Systems

DIY WiFi gas detector with text alerts


Stefan over at Hackster.io has written an article detailing his DIY Wi-Fi gas detector that sends SMS alerts:

Hey guys, back with another little project that I’ve been fiddling with for the past week. With kids around, every parent is thinking how to make their home safer for the little ones and for everybody in general. One of the most dangerous thing in the house can be the stove and since we have a gas-powered one, I always wondered why there are no simple gas detectors that can be used around the stove, just to alert instantly that gas may be leaking.
Well, that was the moment when I decided to build one of my own. Having a Particle (Spark) Photon lying around, I decided to use that as a foundation for the project. I like the fact that they are very small and cheap, and also can be flashed over the Wi-Fi. Having that settled, I needed the gas sensor and some kind of alerting system.

DIY WiFi gas detector with text alerts – [Link]

Arduino based MPPT solar charge controller

20150805_151734 copy

by Abid Jamal @ electronicslovers.com:

what is Mppt( Maximum power point tracking) ?
“we use MPPT algorithm to get the maximum available power from the Photovoltaic module under certain conditions”

How MPPT works ? Why 150W solar panel does not equal to 150 w?
For example you bought a new solar panel from the market which puts out 7 amps. under charge the setting of a battery is configured to 12 volts : 7 amps times 12 volts = 84w (P=V*I) You lost over 66 watts – but you paid for 150 watts. That 66 watts is not going anywhere, but it,s due to the poor match of the solar output current and battery voltage .

Arduino based MPPT solar charge controller – [Link]

Arduino WiFi Shield 101 is on sale


by Zoe Romano @ blog.arduino.cc:

We are excited to announce that Arduino Wifi Shield 101 developed with Atmel is now available for purchase on the Arduino Store US (49.90$).

Arduino WiFi Shield 101 is a powerful IoT shield with crypto-authentication that connects your Arduino or Genuino board to the internet wirelessly. Connecting it to a WiFi network is simple, no further configuration in addition to the SSID and the password are required. The WiFI library allows you to write sketches which connect to the internet using the shield.

Arduino WiFi Shield 101 is on sale – [Link]

nodeLHC – ESP8266 development board


Pedro Minatel shared us his ESP8266 development board project – nodeLHC:

This board was developed at the Campinas Hacker Lab in Brazil during our weekly IoT meetings. This layout and schematic was developed by Leandro Pereira.
The idea was to develop a easy to use board and to learn how to use this magnificent WiFi module.
We are not selling it but you can build your own board if you want!!!
This board is full compatible with nodeMCU, Arduino IDE, native development and any other firmware avaliable.

nodeLHC – ESP8266 development board – [Link]