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_P027_INA219.py
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_P027_INA219.py
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#!/usr/bin/env python3
#############################################################################
##################### INA219 plugin for RPIEasy #############################
#############################################################################
#
# Plugin based on library:
# https://github.com/chrisb2/pi_ina219/
#
# Copyright (C) 2019 by Alexander Nagy - https://bitekmindenhol.blog.hu/
#
import plugin
import webserver
import rpieGlobals
import rpieTime
import misc
import gpios
from ina219 import INA219
class Plugin(plugin.PluginProto):
PLUGIN_ID = 27
PLUGIN_NAME = "Energy (DC) - INA219"
PLUGIN_VALUENAME1 = "Voltage"
PLUGIN_VALUENAME2 = "Current"
PLUGIN_VALUENAME3 = "Power"
def __init__(self,taskindex): # general init
plugin.PluginProto.__init__(self,taskindex)
self.dtype = rpieGlobals.DEVICE_TYPE_I2C
self.vtype = rpieGlobals.SENSOR_TYPE_TRIPLE
self.readinprogress = 0
self.valuecount = 3
self.senddataoption = True
self.timeroption = True
self.timeroptional = False
self.formulaoption = True
self._nextdataservetime = 0
self.lastread = 0
self.ina = None
self.decimals = [3,3,3,0]
def plugin_init(self,enableplugin=None):
plugin.PluginProto.plugin_init(self,enableplugin)
self.initialized = False
if self.enabled:
i2cport = -1
try:
for i in range(0,2):
if gpios.HWPorts.is_i2c_usable(i) and gpios.HWPorts.is_i2c_enabled(i):
i2cport = i
break
except:
i2cport = -1
if i2cport>-1:
if self.interval>2:
nextr = self.interval-2
else:
nextr = self.interval
self._lastdataservetime = rpieTime.millis()-(nextr*1000)
self.lastread = 0
try:
shunt = 0.1
amps = int(self.taskdevicepluginconfig[1])
if amps<1:
amps = None
vrange = int(self.taskdevicepluginconfig[2])
if vrange not in [0,1]:
vrange = 1
if int(self.taskdevicepluginconfig[0])>0x39:
self.ina = INA219(shunt,busnum=i2cport, address=int(self.taskdevicepluginconfig[0]), max_expected_amps=amps)
self.ina.configure(voltage_range=vrange)
self.initialized = True
except Exception as e:
misc.addLog(rpieGlobals.LOG_LEVEL_ERROR,"INA219 can not be initialized: "+str(e))
self.ina = None
self.initialized = False
def webform_load(self): # create html page for settings
choice1 = self.taskdevicepluginconfig[0]
options = ["0x40","0x41","0x44","0x45"]
optionvalues = [0x40,0x41,0x44,0x45]
webserver.addFormSelector("I2C address","plugin_027_addr",len(options),options,optionvalues,None,int(choice1))
webserver.addFormNote("Enable <a href='pinout'>I2C bus</a> first, than <a href='i2cscanner'>search for the used address</a>!")
choice2 = self.taskdevicepluginconfig[1]
options = ["AUTO","200","400","800","1000","1600","2000","3200"]
optionvalues = [0,200,400,800,1000,1600,2000,3200]
webserver.addFormSelector("Maximum current","plugin_027_amp",len(options),options,optionvalues,None,int(choice2))
webserver.addUnit("mA")
choice3 = self.taskdevicepluginconfig[2]
options = ["32","16"]
optionvalues = [1,0]
webserver.addFormSelector("Max voltage","plugin_027_volt",len(options),options,optionvalues,None,int(choice3))
webserver.addUnit("V")
choice4 = self.taskdevicepluginconfig[3]
options = ["None","Voltage","Current","Power"]
optionvalues = [0,1,2,3]
webserver.addFormSelector("Param1","plugin_027_p1",len(options),options,optionvalues,None,int(choice4))
choice5 = self.taskdevicepluginconfig[4]
webserver.addFormSelector("Param2","plugin_027_p2",len(options),options,optionvalues,None,int(choice5))
choice6 = self.taskdevicepluginconfig[5]
webserver.addFormSelector("Param3","plugin_027_p3",len(options),options,optionvalues,None,int(choice6))
return True
def webform_save(self,params): # process settings post reply
par = webserver.arg("plugin_027_addr",params)
if par == "":
par = 0x40
self.taskdevicepluginconfig[0] = int(par)
par = webserver.arg("plugin_027_amp",params)
if par == "":
par = 0
self.taskdevicepluginconfig[1] = int(par)
par = webserver.arg("plugin_027_volt",params)
if par == "":
par = 1
self.taskdevicepluginconfig[2] = int(par)
par = webserver.arg("plugin_027_p1",params)
if par == "":
par = 1
self.taskdevicepluginconfig[3] = int(par)
par = webserver.arg("plugin_027_p2",params)
if par == "":
par = 0
self.taskdevicepluginconfig[4] = int(par)
par = webserver.arg("plugin_027_p3",params)
if par == "":
par = 0
self.taskdevicepluginconfig[5] = int(par)
self.vtype = rpieGlobals.SENSOR_TYPE_TRIPLE
if self.taskdevicepluginconfig[5]==0:
self.vtype = rpieGlobals.SENSOR_TYPE_DUAL
if self.taskdevicepluginconfig[4]==0:
self.vtype = rpieGlobals.SENSOR_TYPE_SINGLE
return True
def plugin_read(self): # deal with data processing at specified time interval
result = False
if self.enabled and self.initialized and self.readinprogress==0:
self.readinprogress = 1
try:
v1 = None
if self.ina is not None:
for i in range(0,3):
vtype = self.taskdevicepluginconfig[3+i]
if vtype==1:
self.set_value(i+1,self.ina.supply_voltage(),False)
elif vtype==2:
self.set_value(i+1,float(self.ina.current()/1000),False)
v1 = 1
elif vtype==3:
self.set_value(i+1,float(self.ina.power()/1000),False)
v1 = 1
except Exception as e:
v1 = None
misc.addLog(rpieGlobals.LOG_LEVEL_ERROR,"INA219: "+str(e))
if v1 is not None:
self.plugin_senddata()
self._lastdataservetime = rpieTime.millis()
result = True
self.readinprogress = 0
return result