Raspberry Pi - Pico W - Enviro+ Board

main.py

import time
import network
import urequests as requests

from picographics import PicoGraphics, DISPLAY_ENVIRO_PLUS
from pimoroni import RGBLED
from breakout_bme68x import BreakoutBME68X, STATUS_HEATER_STABLE
from breakout_ltr559 import BreakoutLTR559
from pimoroni_i2c import PimoroniI2C


temp_adjustment = 7
altitude = 17 # meteres
your_name = ""

# InfluxDB
post_data = "greenhouse,sensor=enviropicow " # Space is important
header_data = {'Authorization': 'Token <token>',}
bucket = ""
org = ""
token = ""
url = "https://europe-west1-1.gcp.cloud2.influxdata.com/api/v2/write?bucket="+bucket+"&org="+org+"&precision=s" # change depending on your influx url
    
def write_influxdb_point(temp_value, press_value, humid_value, lux_value):
    try:
        data = post_data+"temperature="+ str(temp_value)+",pressure="+ str(press_value)+",humidity="+ str(humid_value)+",light="+str(lux_value)
        response = requests.post(url, headers=header_data, data = data)
        response.close()
    except:
        return


# Networking
global wlan
SSID = ""
PASSWORD = ""

def wifi_init():
    global wlan
    wlan = network.WLAN(network.STA_IF)
    wlan.active(True)
    wlan.connect(SSID, PASSWORD)
    wifi_wait()
    
def wifi_wait():
    screen_init()
    screen_wifi_init()
    global wlan
    while True:
        if wlan.status() < 0 or wlan.status() >= 3:
            break
        print('waiting for connection...')
        time.sleep(1)
     
    # Handle connection error
    if wlan.status() != 3:
        screen_wifi_failed()
        raise RuntimeError('network connection failed')
    else:
        screen_init()
        print('connected')
        status = wlan.ifconfig()
        print( 'ip = ' + status[0] )
        
def wifi_check():
        global wlan
        if wlan.status() < 0 or wlan.status() >= 3:
            return
        else:
            wifi_init()
            

# Sensors
PINS_BREAKOUT_GARDEN = {"sda": 4, "scl": 5}
PINS_PICO_EXPLORER = {"sda": 20, "scl": 21}

i2c = PimoroniI2C(**PINS_BREAKOUT_GARDEN)
bmp = BreakoutBME68X(i2c, address=0x77)
ltr = BreakoutLTR559(i2c)

display = PicoGraphics(display=DISPLAY_ENVIRO_PLUS)
display.set_backlight(1.0)

led = RGBLED(6, 7, 10, invert=True)  # setting pins for the RGB led
led.set_rgb(0, 0, 0)


# setup background
BG = display.create_pen(0, 0, 0)
TEXT = display.create_pen(255, 255, 255)
TEMP = display.create_pen(255, 0, 0)
PRESS = display.create_pen(255, 255, 0)
HUMID = display.create_pen(0, 255, 0)
LUX = display.create_pen(0,0,255)


def screen_wifi_init():
    display.set_pen(TEXT)
    display.text("Wifi Connecting...", 5, 10, scale=2)
    display.update()
    return

def screen_wifi_failed():
    display.set_pen(TEXT)
    display.text("Wifi Failed", 5, 10, scale=2)
    display.update()
    return

def screen_init():
    display.set_pen(BG)
    display.clear()

def screen_graph_draw(temp_value, press_value, humid_value,lux_value):
    display.set_pen(BG)
    display.clear()
    display.set_pen(TEMP)
    display.text("TEMP: {:0.2f}c".format(temp_value), 5, 60, scale=2)
    display.set_pen(PRESS)
    display.text("PRESS: {:0.2f}Pa".format(press_value), 5, 100, scale=2)
    display.set_pen(HUMID)
    display.text("HUMID: {:0.2f}%".format(humid_value), 5, 150, scale=2)
    display.set_pen(LUX)
    display.text("LUX: {:0.2f} lux".format(lux_value), 5, 200, scale=2)
    display.set_pen(TEXT)
    display.text(your_name+"'s GreenHouse", 5, 10, scale=2)
    display.text(wlan.config('ssid')+": "+ str(wlan.config('txpower'))+" dBm", 5, 30, scale=2)
    display.update()

def adjust_to_sea_pressure(pressure_hpa, temperature, altitude):
    # Adjusted-to-the-sea barometric pressure
    adjusted_hpa = pressure_hpa + ((pressure_hpa * 9.80665 * altitude) / (287 * (273 + temperature + (altitude / 400))))
    return adjusted_hpa

def main():
     wifi_init()
     screen_init()
     while True:
        temperature, pressure, humidity, gas, status, _, _ = bmp.read()
        
        # correct temperature and humidity using an offset
        corrected_temperature = temperature - temp_adjustment
        dewpoint = temperature - ((100 - humidity) / 5)
        corrected_humidity = 100 - (5 * (corrected_temperature - dewpoint))
        
        
        # convert pressure into hpa
        pressure_hpa = pressure / 100

        # correct pressure
        pressure_hpa = adjust_to_sea_pressure(pressure_hpa, corrected_temperature, altitude)
        
        reading = ltr.get_reading()
        if reading is not None:
            lux = reading[BreakoutLTR559.LUX]
        print(wlan.config('txpower'))
        screen_graph_draw(corrected_temperature, pressure_hpa, corrected_humidity, lux)
        heater = "Stable" if status & STATUS_HEATER_STABLE else "Unstable"
        print("{:0.2f}c, {:0.2f}Pa, {:0.2f}%, {:0.2f} Ohms, {:05.02f} Lux, Heater: {}".format(corrected_temperature, pressure_hpa, corrected_humidity, gas, lux, heater))
        if status & STATUS_HEATER_STABLE:
            wifi_check()
            write_influxdb_point(corrected_temperature, pressure_hpa, corrected_humidity, lux)
        time.sleep(5.0)

main()