Hello!
I came across this forum yesterday as I was researching ways to control my grow LEDs with a PWM signal. Great stuff on here!
I started an automated hydroponic garden last year when I had time at home during the pandemic. It has been a superfun project, and the results have been great! If anyone has any questions about my design, feel free to ask! My system is based on a RaspberryPi and uses open-source Mycodo software as the user interface.
Check out my garden:
https://www.youtube.com/watch?v=kJ5Y3CEXBmA
Thanks!
-AK SkiBum
New to the forum, check out my autonomous garden!
I wrote up a user manual for the system. It doesn't exactly detail the build of each component, but includes schematics and a parts list, as well as details on how to set up the software and run the system. User manual can be viewed here.
Almost everything for this build was ordered from Amazon or Atlas Scientific. The pump box enclosure is listed here:
A fairly comprehensive wiring diagram:
A) 20 x 4 LCD Display, I2C : +5V, GND, SDA, SCL
B) SHT10 Temperature/RH/VPD Sensor, I2C : +3.3V, GND, SDA, SCL
C) CozIR-A CO2 Sensor, UART: ttyUSB0
D) Raspberry PI 4B Computer with screw terminal hat
E) DFRobot AC Current Sensor Chip: +3.3V, GND, A(analog signal out to ADC)
F) 10,000 Ohm resistors, pull pins 16, 19 & 20 low to ground for float switch circuits
G) Voltage Shifter, for LCD Display, Inputs: +3.3V, GND, SDA, SCL, Outputs: +5V, GND, SDA, SCL
H) ADS115 Analog-to-Digital Converter, I2C: 3.3V, GND, SDA, SCL, A0 (analog signal in from AC Current Sensor chip)
I) Atlas Scientific EZO-pH chip, I2C: +3.3V, OFF (Not Connected), GND, SDA, SCL
J) Atlas Scientific EZO-pH chip, I2C: +3.3V, OFF (Not Connected), GND, SDA, SCL
K) Atlas Scientific EZO-pH chip, I2C: +3.3V, OFF (Not Connected), GND, SDA, SCL
L) Atlas Scientific EZO-pH chip, I2C: +3.3V, OFF (Not Connected), GND, SDA, SCL
M) Samsung 128GB USB 3.1 Flash Drive: Boot disk with Raspbian OS Lite & Mycodo installed
N) RJ-45 Jack for AC Box #1, Cat 6e cable connection: +5V, GND, pins 22, 23, 24, 25
O) RJ-45 Jack for AC Box #2, Cat 6e cable connection: +5V, GND, pins 27, 21, 13, 26
P) 3.5 mm Jack for 30 A split-core transformer: AC Current sensor clamps around CannaBot system’s primary AC current wire
Q) BNC Jack for AtlasScientific PT1000 Nutrient Reservoir temperature sensor
R) SMA Jack for AtlasScientific Nutrient Reservoir DO sensor
S) SMA Jack for AtlasScientific Nutrient Reservoir EC sensor
T) SMA Jack for AtlasScientific Nutrient Reservoir pH sensor
U) DC power Jack signal out for Pulse Width Modulation dimmer control of Grow Light LEDs (pin 12)
V) USB-C Jack for Raspberry Pi 5.1V: CanaKit 3.5A power supply
W) DC power Jack for High Level Nutrient Reservoir float switch (pin 20)
X) DC power Jack for Low Level Nutrient Reservoir float switch (pin 19)
Y) DC power Jack for Top-off Reservoir float switch (pin 16)
Z) AC Box 120 V power connections: NEMA 5-15p to C13 power cord
AA) Pump Box Cable, I2C: +3.3V, GND, SDA, SCL
AB) Pump Box power: 1A, 12V DC Transformer
The pump box:
Almost everything for this build was ordered from Amazon or Atlas Scientific. The pump box enclosure is listed here:
A fairly comprehensive wiring diagram:
B) SHT10 Temperature/RH/VPD Sensor, I2C : +3.3V, GND, SDA, SCL
C) CozIR-A CO2 Sensor, UART: ttyUSB0
D) Raspberry PI 4B Computer with screw terminal hat
E) DFRobot AC Current Sensor Chip: +3.3V, GND, A(analog signal out to ADC)
F) 10,000 Ohm resistors, pull pins 16, 19 & 20 low to ground for float switch circuits
G) Voltage Shifter, for LCD Display, Inputs: +3.3V, GND, SDA, SCL, Outputs: +5V, GND, SDA, SCL
H) ADS115 Analog-to-Digital Converter, I2C: 3.3V, GND, SDA, SCL, A0 (analog signal in from AC Current Sensor chip)
I) Atlas Scientific EZO-pH chip, I2C: +3.3V, OFF (Not Connected), GND, SDA, SCL
J) Atlas Scientific EZO-pH chip, I2C: +3.3V, OFF (Not Connected), GND, SDA, SCL
K) Atlas Scientific EZO-pH chip, I2C: +3.3V, OFF (Not Connected), GND, SDA, SCL
L) Atlas Scientific EZO-pH chip, I2C: +3.3V, OFF (Not Connected), GND, SDA, SCL
M) Samsung 128GB USB 3.1 Flash Drive: Boot disk with Raspbian OS Lite & Mycodo installed
N) RJ-45 Jack for AC Box #1, Cat 6e cable connection: +5V, GND, pins 22, 23, 24, 25
O) RJ-45 Jack for AC Box #2, Cat 6e cable connection: +5V, GND, pins 27, 21, 13, 26
P) 3.5 mm Jack for 30 A split-core transformer: AC Current sensor clamps around CannaBot system’s primary AC current wire
Q) BNC Jack for AtlasScientific PT1000 Nutrient Reservoir temperature sensor
R) SMA Jack for AtlasScientific Nutrient Reservoir DO sensor
S) SMA Jack for AtlasScientific Nutrient Reservoir EC sensor
T) SMA Jack for AtlasScientific Nutrient Reservoir pH sensor
U) DC power Jack signal out for Pulse Width Modulation dimmer control of Grow Light LEDs (pin 12)
V) USB-C Jack for Raspberry Pi 5.1V: CanaKit 3.5A power supply
W) DC power Jack for High Level Nutrient Reservoir float switch (pin 20)
X) DC power Jack for Low Level Nutrient Reservoir float switch (pin 19)
Y) DC power Jack for Top-off Reservoir float switch (pin 16)
Z) AC Box 120 V power connections: NEMA 5-15p to C13 power cord
AA) Pump Box Cable, I2C: +3.3V, GND, SDA, SCL
AB) Pump Box power: 1A, 12V DC Transformer
The pump box:
I drew a lot of inspiration from this fella's website and videos. He developed and maintains the mycodo software.
I just added remote dimming capabilities to my grow LEDs after reading through some of the threads on this forum. The next phase will be to build PPFD sensors for the grow space and get super nerdy about photon flux and daily light integrals.
I just added remote dimming capabilities to my grow LEDs after reading through some of the threads on this forum. The next phase will be to build PPFD sensors for the grow space and get super nerdy about photon flux and daily light integrals.