Reflash Arduino UNO ATMEGA16U2

In case you've bricked the UNO bootloader or even the USB bootloader in the ATMEGA16U2, this may help ...

Arduino Library for AD7887

Based on the code  from Makis, SV1AFN I have created a small library to access the AD7887 ADC converter. The library is pretty simple to use.

Getting started with MOSQUITTO

After my first experiments with 2elemtry, I decided to give MOSQUITTO a try. Mosquitto is a small MQTT message broker, which provides basically the same functionality like 2lemetry.

Here the steps, I got Mosquitto up und running on my Windows 8 machine:

Connecting an Arduino to MOSQUITTO

In this post, I've showed, how to setup Mosquitto on an Windows 8 machine. Now let me describe, howto connect an Arduino via Ethernet to the running Mosquitto MQTT broker.

Getting started with 2lemetry

During my researches for my home automation project I also stumbled across the MQTT protocol for sensor-server-communication. A matching arduino library was found quickly here on Nick's blog. An arduino sketch was quickly copied from here and modified. Download my version from here.

MODBUS slave

The MODBUS-slave with the capacitive water level sensor is now mounted inside a die cast aluminium case.

MODBus shield

This is the second PCB I've developed. It is an arduino-shield for my home automation project. It is also devoped using CADSoft EAGLE and was produced by PCB-Devboards in Germany.

MODBus master

The hardware for the MODBus master is mounted on DIN-rails inside a cheap installation box.

Capacitive level sensor - electrode design

In the previous article regarding the capacitive water level sensor, I've presented two different electrode designs:

  • A coaxial electrode made from a rectangular aluminium tube an a  single isolated wire as "central conductor"
  • A simple twin-wire electrode made from simple speaker-wire

Here my findings regarding each electrode.