CanGrow

A simple DIY plant growing system (for cannabis).

WORK IN PROGRESS

Motivation

I want to build a simple grow system, which I can power by my off-grid 12V solar system. So this project is limited to a small 40x40x120 tent for one plant with a 50W 12V grow LED light.

As I did it for my solar system, the measurements of this project will be shown on my website. For that a REST API is planned.

I want to automate as much as possible which makes sense and is easy to build.

Features / ToDo List

• Measure values ✅
  • Humidity ✅
  • soil moisture ✅
  • temperature ✅
  • water level for water tank ✅
• LED grow light control (on/off, dimming, max. 12V 50W load ) ✅
  • You can of course use a relais as well, if you want to drive 220V lights ✅
• fan control (on/off, (PWM?) max 1A) ✅
• pump control for automatic watering (max 1A) 🔵
• Web UI and REST API for data and controlling 🔵
  • simple web ui ✅
  • REST API 🔵
  • Send notifications with web call (e.g. for mastodon) 🔴
  • predefined grow profiles 🔵
  • persistent data ✅
    • Start of Grow ✅
    • day of grow 🔵
    • grow profile
      • watering amount per week 🔵
      • light cycle ✅
    • wifi settings ✅
    • settings in general ✅
• Easy to build and use for beginners (i hope so!) ✅
  • PCB layout to order from manufacture (jlcpcb or pcbway) ✅
  • easy to build up on a perfboard ✅
  • easy to etch pcb ✅
  • easy to access and modify ✅
  • low cost as possible! ✅

✅ Done - 🔵 In Progress - 🔴 ToDo

Parts used

• ESP8266 D1 mini

• BME280 humidity and temp sensor

• I2C soil moisture sensor: https://github.com/Miceuz/i2c-moisture-sensor / https://eu.robotshop.com/de/products/i2c-soil-moisture-sensor

• cheap capacitive soilmoisture sensor: https://www.az-delivery.de/products/bodenfeuchte-sensor-modul-v1-2

• 50W LED 12V full spectrum grow light: https://www.ebay.de/itm/354322466159

• MOSFETS (some i have fyling around, IRFZ44, IRF3205, IRF3710, BUZZ11...)

• 12V 4W water pump set https://www.ebay.de/itm/394413649692