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Low Power IoT Design Challenge
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Blog Solar Powered Smart Composter - Final Demo (Blog5)
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  • Author Author: asokfair
  • Date Created: 5 Nov 2021 4:02 AM Date Created
  • Views 279 views
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  • infineon
  • low_power_iot
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Recommended

Solar Powered Smart Composter - Final Demo (Blog5)

asokfair
asokfair
5 Nov 2021

Hi Everyone,

In the last (blog4) i have setup the wireless charging unit for smart composer. In this blog the final demo is explained.

 

Introduction:

People use composter in their garden to compost the organic waste into bone material which helps the plant grow.

There are many types of composter available in the market but none of them are smart enough. People has to spin everyday

and use the composter thermometer to know the compost level (temperature). My idea is to turn the normal composter into

a smart composter by adding cloud connectivity and sensors. The composter "Envirocycle" i have used in this project was

a gift from element14 community contest.Glad that i have used for another contest entry.

 

 

My earlier blogs explain about the sensor interface (blog2) and cloud connectivity (blog3).

 

Design:

I have used the PSoCTm 6S2 + AIROCTm Wi-Fi/Bluetooth Pioneer Kit for internet connectivity over WIFI and interfaced the

IR temperature sensor over I2C interface. Also i have added Tilt sensor as part of this design. The compete setup is

mounted on the Composter Bin with the help of glue. In practical we can manufacture the Bin (plastic bin) with capable of

placing the circuits and sensors in right place only the Eink display will be shown outside.

 

Solar Power Supply:

The power for the board is given through the Li-Ion 3.7v battery. I have used a boost converter to step up the voltage from 3.7v to 5V.

Unfortunately I faced issues with this PSoC 6S2 kit regarding external power supply. The Eink display does not works as

expected after some time. Even Though i was given enough power, it did not respond well. But when we connect to laptop

Everything works perfectly.

 

I have used the wireless charging module to charge the 3.7V battery from the solar power. Solar panel output is step down into

5V and given to the wireless charger. The charger setup an be mounted on the base of the composter so that it can charge during

day time.

 

AWS Cloud:

The communication is happen over MQTT protocal, the smart composter publishes the data (status, temperature) to cloud and subscribes the

commands from topic. With the help of Lambda and Alexa Skill console i'm able to complete my connectivity part with AWS.

Created skills for smart composter, by asking "Aexa" on mobile or Amazon Eco device will work.

Demonstration:

The final demo shows how this smart composter works. In this demo the accelerometer sensor (BLM160) which is part of Eink shield sense the

rotational motion to detect the spinning.The spinning status is displayed on the Eink display.

 

The temperature sensor is fixed inside the composter bin it senses the temperature level inside the composter. I have used mobile to demonstrate

the Alexa skill by asking with voice commands. The wireless the charging part was not fixed into componster so I couldn't show very well in this demo.

But practically of we design the composter with all these requirement: we can put everything together nicely with waterproof.

 

Here is my final demonstration of "Smart Composter"

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