mirror of
https://github.com/pimoroni/grow-python
synced 2025-10-25 15:19:23 +00:00
267 lines
7.2 KiB
Python
267 lines
7.2 KiB
Python
import time
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import ST7735
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import random
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import math
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import logging
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from PIL import Image, ImageDraw, ImageFont
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from fonts.ttf import RobotoMedium as UserFont
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import RPi.GPIO as GPIO
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from grow.moisture import Moisture
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from grow.pump import Pump
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# Level at which a watering event is triggered
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trigger_level = [
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0.5,
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0.5,
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0.5
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]
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# Level at which the alarm is sounded (watering has failed?)
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alarm_level = [
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0.2,
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0.2,
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0.2
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]
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# Dose settings: Pump Speed, and Dose Time
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dose_settings = [
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(0.7, 0.7),
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(0.7, 0.7),
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(0.7, 0.7)
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]
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# Time the last watering was administered
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last_dose = [
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time.time(),
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time.time(),
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time.time()
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]
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BUTTONS = [5, 6, 16, 24]
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LABELS = ['A', 'B', 'X', 'Y']
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CHANNEL_COUNT = 3
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MINIMUM_WATERING_DELAY = 30 # Minimum time between waterings in seconds
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channel_selected = 0
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alarm = False
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sensors = [
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Moisture(channel=1),
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Moisture(channel=2),
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Moisture(channel=3)
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]
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pumps = [
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Pump(channel=1),
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Pump(channel=2),
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Pump(channel=3)
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]
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logging.basicConfig(
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format='%(asctime)s.%(msecs)03d %(levelname)-8s %(message)s',
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level=logging.INFO,
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datefmt='%Y-%m-%d %H:%M:%S')
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def handle_button(pin):
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global channel_selected, alarm
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index = BUTTONS.index(pin)
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label = LABELS[index]
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if label == 'A': # Select Channel
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channel_selected += 1
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channel_selected %= CHANNEL_COUNT
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if label == 'B': # Cancel Alarm
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alarm = False
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if label == 'X': # Set Wet Point
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pass
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if label == 'Y': # Set Dry Point
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pass
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print("Button {} pressed! Channel: {}".format(label, channel_selected))
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GPIO.setmode(GPIO.BCM)
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GPIO.setwarnings(False)
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GPIO.setup(BUTTONS, GPIO.IN, pull_up_down=GPIO.PUD_UP)
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for pin in BUTTONS:
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GPIO.add_event_detect(pin, GPIO.FALLING, handle_button, bouncetime=150)
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bar_colours = [
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(192, 225, 254), # Blue
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(196, 255, 209), # Green
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(255, 243, 192), # Yellow
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(254, 192, 192) # Red
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]
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label_colours = [
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(32, 137, 251), # Blue
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(100, 255, 124), # Green
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(254, 219, 82), # Yellow
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(254, 82, 82), # Red
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]
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# Only the ALPHA channel is used from these images
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icon_drop = Image.open("icons/icon-drop.png")
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icon_nodrop = Image.open("icons/icon-nodrop.png")
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icon_rightarrow = Image.open("icons/icon-rightarrow.png")
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icon_snooze = Image.open("icons/icon-snooze.png")
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plants = []
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# Load all of the plant icons
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for x in range(1, 15):
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plants.append(Image.open("icons/flat-{}.png".format(x)))
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# Pick a random selection of plant icons to display on screen
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# TODO: Make this the default, but allow override in settings
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picked = random.sample(plants, 3)
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CHANNEL_W = 40
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CHANNEL_M = 2
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# Set up the ST7735 SPI Display
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display = ST7735.ST7735(
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port=0,
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cs=1,
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dc=9,
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backlight=12,
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rotation=270,
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spi_speed_hz=80000000
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)
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display.begin()
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WIDTH, HEIGHT = display.width, display.height
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# Set up our canvas and prepare for drawing
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image = Image.new("RGBA", (WIDTH, HEIGHT), color=(255, 255, 255))
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font = ImageFont.truetype(UserFont, 14)
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draw = ImageDraw.Draw(image)
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def indicator_color(value, r=None):
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if r is None:
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r = bar_colours
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if value == 1.0:
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return r[-1]
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if value == 0.0:
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return r[0]
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value *= len(r) - 1
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a = int(math.floor(value))
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b = a + 1
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blend = float(value - a)
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r, g, b = [int(((r[b][i] - r[a][i]) * blend) + r[a][i]) for i in range(3)]
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return (r, g, b)
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def icon(image, icon, position, color):
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col = Image.new("RGBA", (20, 20), color=color)
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image.paste(col, position, mask=icon)
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def plant(image, plant, channel, available=True):
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x = [18, 58, 98][channel]
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y = HEIGHT - plant.height
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mask = plant
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if not available:
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plant = plant.convert('LA').convert('RGB')
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image.paste(plant, (x, y), mask=mask)
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def update():
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global alarm
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t = time.time()
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for channel in range(0, 3):
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if sensors[channel].active:
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sat = sensors[channel].saturation
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if sat < trigger_level[channel]:
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if t - last_dose[channel] > MINIMUM_WATERING_DELAY:
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dose_speed, dose_time = dose_settings[channel]
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pumps[channel].dose(dose_speed, dose_time)
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last_dose[channel] = t
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logging.info("Watering Channel: {} - rate {:.2f} for {:.2f}sec".format(channel + 1, dose_speed, dose_time))
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if sat < alarm_level[channel]:
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alarm = True
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def render():
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t = time.time()
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# Icon backdrops
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draw.rectangle((0, 0, 19, 19), (32, 138, 251))
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draw.rectangle((0, HEIGHT - 19, 19, HEIGHT), (255, 255, 255))
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draw.rectangle((WIDTH - 20, 0, WIDTH, 19), (75, 166, 252))
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draw.rectangle((WIDTH - 20, HEIGHT - 19, WIDTH, HEIGHT), (254, 218, 80))
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# Icons
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icon(image, icon_rightarrow, (0, 0), (255, 255, 255))
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icon(image, icon_drop, (WIDTH - 20, 0), (255, 255, 255))
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icon(image, icon_nodrop, (WIDTH - 20, HEIGHT - 20), (255, 255, 255))
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# Draw the snooze icon- will be pulsing red if the alarm state is True
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r = 129
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if alarm:
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r = int(((math.sin(t * 3 * math.pi) + 1.0) / 2.0) * 255)
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icon(image, icon_snooze, (0, HEIGHT - 20), (r, 129, 129))
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# Saturation amounts from each sensor
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c1 = 1.0 - sensors[0].saturation
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c2 = 1.0 - sensors[1].saturation
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c3 = 1.0 - sensors[2].saturation
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# Channel presence detection
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ca1 = sensors[0].active
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ca2 = sensors[1].active
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ca3 = sensors[2].active
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draw.rectangle((21, 0, 138, HEIGHT), (255, 255, 255)) # Erase channel area
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# Draw background bars
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draw.rectangle((21, int(c1 * HEIGHT), 58, HEIGHT), indicator_color(c1) if ca1 else (229, 229, 229))
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draw.rectangle((61, int(c2 * HEIGHT), 98, HEIGHT), indicator_color(c2) if ca2 else (229, 229, 229))
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draw.rectangle((101, int(c3 * HEIGHT), 138, HEIGHT), indicator_color(c3) if ca3 else (229, 229, 229))
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# Draw plant images
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for p in range(3):
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plant(image, picked[p], p, [ca1, ca2, ca3][p])
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# Channel selection icons
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draw.rectangle((33, 2, 48, 17), indicator_color(c1, label_colours) if ca1 else (129, 129, 129))
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draw.rectangle((33 + 40, 2, 48 + 40, 17), indicator_color(c2, label_colours) if ca2 else (129, 129, 129))
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draw.rectangle((33 + 80, 2, 48 + 80, 17), indicator_color(c3, label_colours) if ca3 else (129, 129, 129))
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selected_x = 21 + (40 * channel_selected) + 10
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draw.rectangle((selected_x, 0, selected_x + 19, 20), indicator_color([c1, c2, c3][channel_selected], label_colours) if [ca1, ca2, ca3][channel_selected] else (129, 129, 129))
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# TODO: replace with graphic, since PIL has no anti-aliasing
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draw.polygon([
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(selected_x, 20),
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(selected_x + 9, 25),
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(selected_x + 19, 20)
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],
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fill=indicator_color([c1, c2, c3][channel_selected], label_colours) if [ca1, ca2, ca3][channel_selected] else (129, 129, 129))
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# TODO: replace number text with graphic
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draw.text((33 + 3, 2), "1", font=font, fill=(255, 255, 255))
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draw.text((33 + 40 + 4, 2), "2", font=font, fill=(255, 255, 255))
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draw.text((33 + 80 + 4, 2), "3", font=font, fill=(255, 255, 255))
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def main():
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while True:
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update()
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render()
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display.display(image.convert("RGB"))
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# 5 FPS
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time.sleep(1.0 / 5)
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if __name__ == "__main__":
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main()
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