eAgrar - digital agriculture

System for monitoring conditions of plants and weather conditions at agricultural fields

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eAgrar is system for monitoring conditions of plants and weather conditions at agricultural fields.

It is based on wireless sensor network (LoRa communication).
Sensor devices are "plug-and-play" devices. They are battery powered (more than 1 year on same battery) and have long range communication (up to 10km from gateway). Device is based on ATmega328 microprocessor and have sensors for measuring air temperature, air humidity, pressure, soil moisture and leaf moisture.
Sensor devices send data to multichannel gateway which forward them to database.

All data are displayed at our dashboard through widgets, graphs and tables.

Climate change has a severe effect on agricultural production, leading to lower productivity. Farmers have big problems with diseases on their fields due to climate and weather shocks and lack of information from fields. As result of that crops are more sensitive and vulnerable. Farmers must use a lot of pesticides and other chemical agents to stop the development of the disease. That pollutes the environment.

With more information from fields, farmers can predict appearance of disease and prevently treat their plants. That will help them to reduce costs, reduce damages on plants, increase quality of crops and increase yields. Using chemical agents on clever way, in smaller quantities, will enable to customers get healthier food.

I'm developing this system for 18 months. All parts of system are developed from zero. 

This is second version of sensor device. It is based on ATmega328 microprocessor. It has LoRa module for communication and RTC (Real Time Clock) which is used as wakeup alarm of device. This version of device has possibility to connect up to 4 sensors

Device is powered from 3.7V Li-Ion battery and can be powered from same battery more than 1 year. There is also possibility to use 5V boost converter for powering 5V sensors.

Production of PCBs is made by @JLCPCB-OFFCIAL ( They have great option to take 10 prototype boards for just 2$! Check that! I'm really satisfied with quality of board. Pads and vias are solid and high quality even at high temperatures. They didn't rusted even in realistic conditions

I have developed system for controlling devices in LoRa wireless sensor network. So even that device is not connected to Internet all time, I'm able to change sleep time, communication parameters and other parameters remotely, without reprogramming device.

Dashboard is on Croatian language for now. It offers widgets for last measurements, graph for displaying temperature and another graph for displaying all other moisture measurements. Also, there is data table with all data shown from beginning of device life. There is calendar which have possibility to be diary of activities (leaving notes).

If you find this project exciting and useful, please, support it with Follow and Like. That will give us more chance to keep it developing :)

JLCPCB——Free PCB unlocking students creativity
With over 10 years of PCB prototype experience, JLCPCB products are used across all
industries. To give back society, we also committed to inspiring students' creativity
and developing new ideas by giving them free PCB sponsorship.42 groups of
students applied soponsorship in 2019, 978 students cost $0 on PCB. JLCPCB is PCB sponsor
As a PCB supplier, of course, we supply PCBs for students for free. It gives resource
assistance to students while they improve the projects and to aid them to improve
the practical knowledge essential for electrical and electronic projects so that their
creativity becomes a real project by brain and hand. JLCPCB is a learning platform
As a learning platform, JLCPCB maintains close contact with students. We look for
electronic creators that meet their learning goals to help the growth of project
capabilities. By June 2020, over 500 electronic makers have cooperated with JLCPCB. We invited famous EE creators: Great Scott, Lady Ada, EEVBLOG... Their project
article, project course, project video which are created with JLCPCB can be searched
online anytime. In those kinds of ways, students can create personalized learning
environments. JLCPCB is a tech advisor. Tech advisor is our reason for being for students. our innovative tools Easy EDA and
our practical PCB are contributing to technologies from software to hardware. The
seamless structure urges students to connect with reality and idea, from open
source, mobile software to 3D technologies, you can see how our products have
shaped the world. How to apply sposnorship?
With 42 sponsoring groups worldwide,...

Read more »

JPEG Image - 75.73 kB - 04/29/2019 at 11:14


  • 1 × PCB board (JLCPCB production)
  • 1 × ATmega328 microprocessor
  • 1 × RTC (Real Time Clock)
  • 1 × RFM95W LoRa module
  • 1 × 3.7V Li-Ion battery

View all 9 components

View all 5 project logs

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richard patterson wrote 09/17/2021 at 05:33 point

Much respect for the people behind this post it is very educative.

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steven chong wrote 09/13/2021 at 15:34 point

The digital revolution continues to transform agriculture.

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Crystal S. Brown wrote 09/10/2021 at 15:23 point

What a wonderful post. click here

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luis brown wrote 09/07/2021 at 11:36 point

I have been eating that for a while I just referred to it as eagrar.

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