My house is located on Møn. It is a remote area with beautiful landscape. Unfortunately, there are some inconsiderate people
who do not store pig waste proberly . This causes funny smell sometime, the neighbors tried to write to the government
to make them stop doing that but there was no proof of showing when and how intensive was the smell. This is why I come up with the idea
of detecting volatile organic compoundsin the air. This application is able to measure different elements in the environment: temperature, humidity, air quality and pressure.
Gas sensor data is collected from BME680 sensor and stored in the cloud database.
Air quality sensor
This section explains how to interpret BME680 data. According to Bosch, "The BME680 is the first gas sensor that integrates high-linearity and high-accuracy gas, pressure, humidity and temperature sensors. It is especially developed for mobile applications and wearables where size and low power consumption are critical requirements.
The BME680 guarantees - depending on the specific operating mode - optimized consumption, long-term stability and high EMC robustness. In order to measure air quality for personal wellbeing the gas sensor within the BME680 can detect a broad range of gases such as volatile organic compounds (VOC)."
Therefore, this sensor is approriate to measure the air quality and organic components in the air.
Technical informations
Table 4 lists air quality system specification. Details of classification according to value range are described in Table 4.This value range can be compared with value from air quality sensor to classify the quality of air. [Bosch]
Table 5 shows estimated VOC concentration output (in ppm) based on the static IAQ output and lab tests (including with the b-VOC mixture). The BME680 is a TVOC sensor, not a CO2 sensor. Therefore any BSEC output will always be proportional to the total VOC concentration detected by the BME680 in its environment, not to CO2.[Bosch]
Some pictures of my house
2022 is a year we will try to forget. I remember at the beginning of the year, when the covid was over. Everyone was excited, the economy was opening, we could travel to the other side of the globe again.
And everyone knows what happened in March 2022. It has caused energy crisis in Europe, electricity is more than 10 times expensive than the covid time (2020). Everyone was in rush looking for more sustainable energy, and I am no different.
This project is to get energy from the sun, charge battery, run few small devices like robot lawn mower, surveilance and sensors. It can also monitor battery, power consumption, PV and control battery based on nordpool price in the future (maybe). I started the project from July, it's been more than 3 months
but it's not finished yet. There are so many things to consider. This is a long post and will continue updating.
Solar-battery project
Summer 2022:
My initial idea was to use energy from the sun to drive the water pump of my fountain. The fountain looks like this:
For this purpose, two solar panels, a solar charge, 1 battery as a buffer, and an inverter should be sufficient enough to drive my fountain.
My solar panels were placed on my garden tool shed and heading south.
Cheap Chinese PWM charger, and a secondhand car battery.
Small inverter for light and fountain
A small inverter for light and fountain
Things would be simple if it stopped here. But no, I wanted also to use solar energy for the robot lawn mower as well.
The problem with the small inverter is that it's not a pure sine wave inverter.
I could hear noise from the transformer created by this sharpy sine wave. So I had to buy more battery and a better inverter.
Another thing to consider is also a better solar charger.
Through a little research, I know that Victron is a good brand for solar charger, and MPPT is better than PWM.
And buying more solar panels is also to ensure there's enough energy for 3 batteries
The good thing about Victron solar charger is that it has a serial port, and its protocol is quite simple.
I can get data from it easily through a python library This is the day when I also started to set up a cloud server and save solar and battery data to the cloud.
A 1000W pure sine wave with 3 batteries was also in use
For this number of batteries and a bigger inverter, 2 solar panels were not good enough. I had to buy the other 2
My house is located on Møn. It is a remote area with beautiful landscape. Unfortunately, there are some inconsiderate people
who do not store pig waste proberly . This causes funny smell sometime, the neighbors tried to write to the government
to make them stop doing that but there was no proof of showing when and how intensive was the smell. This is why I come up with the idea
of detecting volatile organic compoundsin the air. This application is able to measure different elements in the environment: temperature, humidity, air quality and pressure.
Gas sensor data is collected from BME680 sensor and stored in the cloud database.
2022 is a year we will try to forget. I remember at the beginning of the year, when the covid was over. Everyone was excited, the economy was opening, we could travel to the other side of the globe again.
And everyone knows what happened in March 2022. It has caused energy crisis in Europe, electricity is more than 10 times expensive than the covid time (2020). Everyone was in rush looking for more sustainable energy, and I am no different.
This project is to get energy from the sun, charge battery, run few small devices like robot lawn mower, surveilance and sensors. It can also monitor battery, power consumption, PV and control battery based on nordpool price in the future (maybe). I started the project from July, it's been more than 3 months
but it's not finished yet. There are so many things to consider. This is a long post and will continue updating.
