bonsai-feeder

System to automatically water our bonsais

How to install?

First you will need to add this library into your Arduino Library folder.

git clone git@github.com:CZYK/bonsai-feeder.git ~/Documents/Arduino/libraries/Bonsai

Now you can write your own module which uses this library. You can find an example below.

#include <Bonsai.h>

// Danko tree
// This tree's sensor measures 40% when the bottom touches the water.
Bonsai danko("Danko", 12, 8, A0, 10, 3000);

void setup()
{
  Serial.begin(9600);
  Serial.println("Starting bonsai feeder...\n");
  Serial.println("Runs\tName\tMoisture");
  pinMode(13, OUTPUT);
}

void loop()
{
  digitalWrite(13, HIGH);
  danko.check();
  delay(250);
  digitalWrite(13, LOW);
  
  delay(250);
}

These are the analogue output values of the new sensors. An average of 250-1000 has been mapped to 0-100%. It would be nice to calibrate this per sensor but the code (at the moment) does not allow that. That is also the reason why Danko's tree is set to 40% while Rob's is set to 25%. Both equal the same level of moist (the bottom of the sensor in the water).

Reading	Danko	Rob	Comment
Open Air	1000	1002	Sensor in dry air
Feet wet	770	850	Bottom of sensor touching the water, not so accurate
Completely wet	296	250	Sensor completely soaked in a cup of water

Ingredients:

Component	Description	Price
Bonsai		€ 10,00
Arduino UNO	Main board	€ 23,00
Moist sensor	Measure the humidity	€ 3,00
Relais	To power the water pump	€ 2,50
Water pump		€ 4,00
Water hose		€ 1,50
One-way-valve	So the water stays in the hose	€ 3,15
PP T-stuk 6,4mm	For more even water distribution	€ 1,70