#!/usr/bin/env python
import cayenne.client
import time
from ina219 import INA219, DeviceRangeError
from time import sleep

MQTT_USERNAME  = "MQTT_USERNAME"
MQTT_PASSWORD  = "MQTT_PASSWORD"
MQTT_CLIENT_ID = "MQTT_CLIENT_ID"

client = cayenne.client.CayenneMQTTClient()
client.begin(MQTT_USERNAME, MQTT_PASSWORD, MQTT_CLIENT_ID)

SHUNT_OHMS = 0.1
MAX_EXPECTED_AMPS = 2.0
ina = INA219(SHUNT_OHMS, MAX_EXPECTED_AMPS)
ina.configure(ina.RANGE_16V)
 
def read_ina219():
    try:
        print('Tension du Bus: {0:0.2f}V'.format(ina.voltage()))
        print('Courant du Bus: {0:0.2f}mA'.format(ina.current()))
        print('Alimentation: {0:0.2f}mW'.format(ina.power()))
        print('Tension de Dérivation: {0:0.2f}mV\n'.format(ina.shunt_voltage()))
    except DeviceRangeError as e:
        # Current out of device range with specified shunt resister
        print(e)
 
while 1:
    read_ina219()
    sleep(1)