Arduino
In case you've bricked the UNO bootloader or even the USB bootloader in the ATMEGA16U2, this may help ...
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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:
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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.
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The MODBUS-slave with the capacitive water level sensor is now mounted inside a die cast aluminium case.
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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.
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The hardware for the MODBus master is mounted on DIN-rails inside a cheap installation box.
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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.
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Kategorie: Arduino
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2014 CW (Morse Telegraphy) was added to the German Nationwide Inventory of Intangible Cultural Heritage.
© 2018 Dietmar Krause, DL2SBA