Philipp's Smart Planter

This Planter was designed and programmed by me and is free to use non-commercially for everybody who wants to.

Information about Hardware, Wiring and Parameters will be provided in this document.

Hardware

The following components are required to build the Smart Planter:

• 1 x ESP32 Wroom
• 1 x Capacitive Moisture Sensor
• 1 x PIR Motion Sensor (HC-SR501)
• 1 x DFPlayer Mini
• 1 x Laptop Speaker (max 3 Watt)
• 1 x Micro SD Card (16GB or 32GB)
• 1 x 1k Resistor (optional)

Wiring

The 1k resistor is optional, but removes noise from the speaker at the cost of some volume.

Parameters

At the beginning of the main.py file 3 parameters can be adjusted:

Files

The number of audio files you have on your microSD card in folder 01

Timer

The amount of seconds you want to wait between checks

Threshold

The moisture threshold (0-2500). You may want to play around with this for a bit. 2500 is very dry and 0 would be very wet.

SD Card

The used micro SD card needs to be either 16 or 32 GB and formatted in FAT32. The audio files can be either mp3 or WAV and need to be stored using this file structure:

• 01
  • 001.mp3
  • …
  • 999.mp3
• 02
  • 001.mp3

In Folder 01 you can put all your audio files with corresponding numbers. Folder 02 contains a startup sound that is played once when the planter is connected to power. I will provide sample audio files in the sd_card folder.

Load the contents of the src folder onto your ESP32 and the contents of the sd_card folder onto your micro SD card.

Acknowledgements

Special thanks go to @Muhlex for providing the library to use the DFPlayer Mini together with Micropython and helping me setting it up. Check out his work at https://github.com/Muhlex/dfplayer-mp.

Arduino

I have also added an Arduino version for the code, because the controller kept crashing after a couple of days. The wiring is the same, just upload the Arduino_SmartPlanter.ino sketch to your ESP32