Table of Contents
Smart Agriculture for Cats
Starts from 2021/Aug/15 to 2023/02/11 17:30 (Last Modification)
Overview
I often forgot to water the barley grass for my cats. Thus, I spent two days for designing a “Smart Agriculture” project for my cats, one day for hardware design, another day for the software design.
The hardware is based on ESP32. The software is based on IBM Node-Red and Mosquitto, totally using private cloud.
Features:
- 7-Day Programmable Scheduling
- Up to two soil moisture sensors support
- Up to two relays support
- Up to two controlled 5V outputs
- ADC, I2C, SPI and additional IOs extension connectors
- USB Type C Socket
Hardware Design
| Schematics | smart_agriculture_for_cats_sch.pdf | Version: 15 Aug 2021 |
| Gerber Files | smart_agriculture_for_cats_gerberfiles.zip | Version: 15 Aug 2021 |
| No. | Description |
|---|---|
| 1 | ESP32 WROOM |
| 2 | Relay 1 Connector |
| 3 | Relay 2 Connector |
| 4 | Controlled 5V output 1 |
| 5 | Controlled 5V output 2 |
| 6 | Soil moisture sensor 1 |
| 7 | Soil moisture sensor 2 |
| 8 | I2C Connector |
| 9 | SPI Connector |
| 10 | Additional IOs connector |
| 11 | User Button |
| 12 | USB Type C Socket |
| 13 | ESP32 Flash Download Tool Connector |
Software Design
Firmware
| Firmware | smart_agriculture_for_cats_firmware.zip | Version: 15 Aug 2021 |
MQTT Topic Definitions
Topic: HOME/SA01/IO Type:Subscription
| Commands | Description |
|---|---|
| ATS+ R1ON NUM | Turn on Relay 1 for NUM ms |
| ATS+ R2ON NUM | Turn on Relay 2 for NUM ms |
| ATS+ R1OFF NUM | Turn off Relay 1, NUM is ignored |
| ATS+ R2OFF NUM | Turn off Relay 2, NUM is ignored |
| ATS+ P1ON NUM | Turn on Controlled 5V output 1 for NUM ms |
| ATS+ P2ON NUM | Turn on Controlled 5V output 2 for NUM ms |
| ATS+ P1OFF NUM | Turn off Controlled 5V output 1, NUM is ignored |
| ATS+ P2OFF NUM | Turn off Controlled 5V output 2, NUM is ignored |
Topic: HOME/SA01/IO/FB Type:Publish
| Commands | Description |
|---|---|
| R1ON | Confirmation for Relay 1 turning on |
| R1OFF | Confirmation for Relay 1 turning off |
| R2ON | Confirmation for Relay 2 turning on |
| R2OFF | Confirmation for Relay 2 turning off |
| P1ON | Confirmation for Controlled 5V output 1 turning on |
| P1OFF | Confirmation for Controlled 5V output 1 turning off |
| P2ON | Confirmation for Controlled 5V output 2 turning on |
| P2OFF | Confirmation for Controlled 5V output 2 turning off |
Topic: HOME/SA01/SENSOR/SOIL1/FB Type:Publish
| Commands | Description |
|---|---|
| NUM | Raw ADC data from AD4 |
Note: NUM is unsigned integer in string.
Server-side Software
Prerequisites
| Item | Description | Link |
|---|---|---|
| Ubuntu Server | Ubuntu 20.04.2 LTS | https://ubuntu.com |
| Node-RED | 2.0.5: Maintenance Release | https://nodered.org |
| Mosquitto | Version 2.0 | https://mosquitto.org |
| node-red-contrib-ui-time-scheduler | [v1.15.2] - 2021-08-13 | https://github.com/fellinga/node-red-contrib-ui-time-scheduler |
Node-RED Flows
| Node-RED Flows Screenshot | smart_agriculture_for_cats_node_red_flows.jpg | Version: 15 Aug 2021 |
| Node-RED Flows JSON | smart_agriculture_for_cats_node_red_flows_json.zip | Version: 15 Aug 2021 |
User Interface
| No. | Description |
|---|---|
| 1 | 7-Day Programmable Scheduling |
| 2 | Irrigation Time Duration for each Connector |
| 3 | Once enabling this option, the scheduled tasks will be preformed if and only if the soil moisture exceeding the threshold. |
| 4 | Irrigation Statistics: 0 means idle, 1 means watering. |
| 5 | Moisture data from soil moisture sensors. |
Accessories
Soil Moisture Sensor
Low-cost capacitive soil moisture sensor was connected to the soil moisture sensor 1 connector in this project.
Specifications:
- Operating Voltage: DC 3.3-5.5V
- Output Voltage: DC 0-3.0V
- Interface: PH2.0-3P
- Size: 99x16mm/3.9×0.63“
Mini Water Pump
4.5VDC Mini Water Pump was connected to the controlled 5V output 1 connector in this project.
Harvest Season
It seems no cat can refuse barley grass.
Resource
Downloads
| Schematics | smart_agriculture_for_cats_sch.pdf | Version: 15 Aug 2021 |
| Gerber Files | smart_agriculture_for_cats_gerberfiles.zip | Version: 15 Aug 2021 |
| Firmware | smart_agriculture_for_cats_firmware.zip | Version: 15 Aug 2021 |
| Node-RED Flows Screenshot | smart_agriculture_for_cats_node_red_flows.jpg | Version: 15 Aug 2021 |
| Node-RED Flows JSON | smart_agriculture_for_cats_node_red_flows_json.zip | Version: 15 Aug 2021 |
Related Projects
| Project Name # | Description | Project Home Page |
|---|---|---|
| ESP32 Flash Download Tool | ESP32 Flash Download Tool |