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Published © Apache-2.0

Water Temperature Tracking Device

I live on a lake and always wanted to measure and track its water temperature. Hologram Nova and RaspberryPi would make it possible.

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Water Temperature Tracking Device

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Code

Python script

Python
#!/usr/bin/python
# -*- coding: utf-8 -*-

import time

temps = []

try:
	# 1-Wire Slave-Liste lesen
	file = open('/sys/devices/w1_bus_master1/w1_master_slaves')
	w1_slaves = file.readlines()
	file.close()

	# Fuer jeden 1-Wire Slave aktuelle Temperatur auslesen
	idx = 0
	for line in w1_slaves:
		# 1-wire Slave extrahieren
		w1_slave = line.split("\n")[0]

		try:
			# 1-wire Slave Datei lesen
			name = '/sys/bus/w1/devices/' + str(w1_slave) + '/w1_slave'
			file = open(name)
			filecontent = file.read()
			file.close()

			# Temperaturwere auslesen und konvertieren
			print(filecontent)
			stringvalue = filecontent.split("\n")[1].split(" ")[9]
			print(stringvalue)
			temperature = float(stringvalue[2:]) / 1000

			#Temperatur ausgeben
			print(str(w1_slave) + ': %6.2f °C' % temperature)
			temps.append(temperature)
			
		except:
			print(name + ' does not exist.')
		
		idx = idx + 1
		time.sleep(1)

except:
	print('w1_master_slaves not found.')

from Hologram.HologramCloud import HologramCloud
hologram = HologramCloud(dict(), network='cellular')
result = hologram.network.connect()
if result == False:
	print(' Failed to connect to cell network')
	
for idx in range(0, len(temps)):

	print('%6.2f °C' % temps[idx])

	result = hologram.sendMessage('{"temperature": %6.2f}' % temps[idx], ["Zernsee" + str(idx+1)])
	print(result)

	time.sleep(10)

hologram.network.disconnect()

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