import time
import machine
import onewire, ds18x20
import json
import ubinascii
import utils

# the device is on GPIO12
class TempMon:
	def __init__(self, pin):
		dat = machine.Pin(pin)
		# create the onewire object
		self.ds = ds18x20.DS18X20(onewire.OneWire(dat))
		# scan for devices on the bus
		self.roms = self.ds.scan()
		print('found devices:', self.roms)

# loop 10 times and print all temperatures
	def read_temp(self):
		try:
			print('temperatures:', end=' ')
			self.ds.convert_temp()
			vals=[]
			time.sleep_ms(750)
			for rom in self.roms:
				vals.append(dict(id=ubinascii.hexlify(rom).decode('utf-8'), temp=self.ds.read_temp(rom)))	
			        #print('%s/%s' % (rom, self.ds.read_temp(rom), end=' '))
			print(json.dumps(vals))
			return vals
		except Exception:
			print("error encountered...continuing")
		


class DweetTemp:
	def __init__(self, thing, pin):
		self.thing = thing
		self.t = TempMon(pin)

	def dweet(self, readings):
		self.url = 'http://dweet.io/dweet/for/%s?' % self.thing + '&'.join('%s=%s' % (e['id'], e['temp']) for e in readings) 
		print(self.url)
		utils.http_get(self.url)
		 
	def post_dweet(self, loop=1, interval=5):
		for i in range(loop):
			self.dweet(self.t.read_temp())
			time.sleep(interval)