driver_xbos_evse.md

XBOS EVSE

Interface: i.xbos.evse

Description: Standard XBOS electric vehicle supply equipment (charging station)

PONUM: 2.1.1.7

Properties

Name	Type	Description	Units	Required
charging_time_left	integer	Seconds left until car is fully charged	s	false
current	double	Active charge current	A	true
current_limit	double	Maximum allowed current for charging	A	true
state	boolean	Charge state of the EVSE	on/off	true
time	integer	nanoseconds since the Unix epoch	ns	true
voltage	double	Active charge voltage	V	true

Signals

• info:
  • current_limit
  • current
  • state
  • voltage
  • charging_time_left
  • time

Slots

• state:
  • current_limit
  • state

Interfacing in Go

package main

import (
	"fmt"
	bw2 "gopkg.in/immesys/bw2bind.v5"
)

func main() {
	client := bw2.ConnectOrExit("")
	client.OverrideAutoChainTo(true)
	client.SetEntityFromEnvironOrExit()

	base_uri := "EVSE uri goes here ending in i.xbos.evse"

	// subscribe
	type signal struct {
		Current_limit      float64 `msgpack:"current_limit"`
		Current            float64 `msgpack:"current"`
		State              bool    `msgpack:"state"`
		Voltage            float64 `msgpack:"voltage"`
		Charging_time_left int64   `msgpack:"charging_time_left"`
		Time               int64   `msgpack:"time"`
	}
	c, err := client.Subscribe(&bw2.SubscribeParams{
		URI: base_uri + "/signal/info",
	})
	if err != nil {
		panic(err)
	}

	for msg := range c {
		var current_state signal
		po := msg.GetOnePODF("2.1.1.7/32")
		err := po.(bw2.MsgPackPayloadObject).ValueInto(&current_state)
		if err != nil {
			fmt.Println(err)
		} else {
			fmt.Println(current_state)
		}
	}
}

Interfacing in Python

import time
import msgpack

from bw2python.bwtypes import PayloadObject
from bw2python.client import Client

bw_client = Client()
bw_client.setEntityFromEnviron()
bw_client.overrideAutoChainTo(True)

def onMessage(bw_message):
  for po in bw_message.payload_objects:
    if po.type_dotted == (2,1,1,7):
      print msgpack.unpackb(po.content)

bw_client.subscribe("EVSE uri ending in i.xbos.evse/signal/info", onMessage)

print "Subscribing. Ctrl-C to quit."
while True:
  time.sleep(10000)