IoT Powersensor #2
For the main power distribution in my house, I also build a powersensor. The basic idea is the same as for this sensor. But the electric meter is already build into the distribution cabinet, so this power meter uses the so-called S0 bus of the power meter inside the cabinet.
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- Kategorie: IoT Internet of Things
IoT Powersensor #1
This is my first power/voltage sensor I've build. It is based on an commercially available powermeter from B+G E-Tech. You can find them on eBay or their website. It provides a 90ms pulse for each Wh flown through it.
The line voltage is measured using a simple transformer and a circuit based on the schematic from OpenEnergyMonitor. The software to measure the line voltage is also from OpenEnergyMonitor embedded into my sensor framework.
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- Kategorie: IoT Internet of Things
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.
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- Kategorie: Arduino
IoT System management
My MQTT server also has some basic systems management capabilities - means the MQTT server can emit the following data to the MQTT broker:
- CPU temperature
- Power supply temperature
- Average CPU load
- Uptime of server
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- Kategorie: IoT Internet of Things
IoT MQTT Infrastructure
Since the beginning of my home automation project I made several tests to choose the right platform and right controller. I've done test with various sensor technologies etc. etc.
Most of the articels can be found in the Arduino category.
One decision was, that my webhost should be the main datastore for all data measured. With this decision, I've started to build a data collection and distribution infrastructure. The complete setup consists of two major components:
These components are detailed further down the page.
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- Kategorie: IoT Internet of Things
IoT MQTT configuration
Some basic config stuff for the RASPI & MQTT
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- Kategorie: IoT Internet of Things
ELECRAFT K-POD
Last week I received my long awaited K-POD from QRP-Project in Berlin.
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- Kategorie: Shack
Rotator control with a NodeMCU runs stable
My proof-of-concept works pretty stable - please check the status screen:
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- Kategorie: Shack
Detailed measurement on audio CW-filter
Here I've build an audio CW-filter based on the circuit from NM0S/4SQRP.
This filter works pretty well. I've done some audio analysis using a cheap soundcard from BEHRINGER and the shareware application AUDIOTESTER.
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- Kategorie: Shack
Audio CW-Filter finished
Now I've finished the Audio CW-filter I've decribed here in details.
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- Kategorie: Shack
Rotator control and the NodeMCU - a proof of concept
Basics
Inspired from the work of EA4TX and K3NG I decided to check, whether the ESP8266 based NodeMCU 1.0 (ESP-12E) is usable as a simple remote IP-based rotator control. You can get the NodeMCU in a decent quality on eBay.
Idea was, to link a local emulated serial port to the NodeMCU module. The HAM Radio applications are communicating via the standard Yaesu GS232A protocol with the emulated serial port. This emulated serial port then forwards the serial requests to the NodeMCU.
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- Kategorie: Shack
Weiterlesen: Rotator control and the NodeMCU - a proof of concept
Wanderungen/Ausflüge
Hier eine Sammlung unserer Wanderungen/Ausflüge der vergangenen Jahre
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- Kategorie: Wandern
CW-Sensor-Keyer
Based on the work of John, M0UKD, I've build a small sensor-keyer. I used a surplus aluminium shelf and two aluminium stand-offs as "paddles".
See the evolution of this project here.
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- Kategorie: Shack
IoT Lightsensor
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- Kategorie: IoT Internet of Things
Worked all Germany contest 2015
This was my first participation in the WAG contest since 2010 - and I must say, it was a pleasure!
I managed to complete 472 QSOs all in CW :-)
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- Kategorie: Allgemein
ELECRAFT K2 - Fixing VFO ALC issue
I've planned to sell my ELECRAFT K2 so I placed some adds in the various HAM sources and I found a buyer willing give my K2 a new home.
Fortunately I decided to do a quick check on the K2 functions, to be sure, that the buyers receives a full functional K2.
I did the check in the late afternoon on 80m and I was shocked - strong stations can be received every 7kHz. Testing the transmitter shows a totally unstable RF signal.
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- Kategorie: Transceiver
XPhase - Interference reduction
Some weeks ago I've build a full-featured XPhase for my father, DK1UO. He is sometimes affected by heavy interference from Plasma-TVs or similar scrap
The function of the XPhase is based on the fact that the interfering signal, received by an auxiliary antenna, is added phase-shifted to the signal received from the main antenna. When the phase-shift is more or less 180°, the interfering signal is canceled out.
My XPhase is based on the work of Hanns, DK9NL. A commercial versions can be found here under the name QRM-Eliminator. Google will provide you some futher informations.
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- Kategorie: Shack
LF-Converter
I've ordered the LF-converter BX-082 kit from the German HAM Radio magazine FUNKAMATEUR already some months ago and now found the time to build and test it.
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- Kategorie: Transceiver
2014 CW (Morse Telegraphy) was added to the German Nationwide Inventory of Intangible Cultural Heritage.
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© 2022 Dietmar Krause, DL2SBA