144 lines
3.6 KiB
Go
144 lines
3.6 KiB
Go
package charger
|
|
|
|
import (
|
|
"errors"
|
|
"time"
|
|
|
|
"github.com/andig/evcc/api"
|
|
"github.com/andig/evcc/util"
|
|
"github.com/grid-x/modbus"
|
|
)
|
|
|
|
// SimpleEVSE charger implementation
|
|
type SimpleEVSE struct {
|
|
log *util.Logger
|
|
client modbus.Client
|
|
handler modbus.ClientHandler
|
|
}
|
|
|
|
const (
|
|
evseRegAmpsConfig = 1000
|
|
evseRegVehicleStatus = 1002
|
|
evseRegTurnOff = 1004
|
|
)
|
|
|
|
// NewSimpleEVSEFromConfig creates a SimpleEVSE charger from generic config
|
|
func NewSimpleEVSEFromConfig(other map[string]interface{}) (api.Charger, error) {
|
|
cc := struct{ URI, Device string }{}
|
|
if err := util.DecodeOther(other, &cc); err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
return NewSimpleEVSE(cc.URI, cc.Device)
|
|
}
|
|
|
|
// NewSimpleEVSE creates SimpleEVSE charger
|
|
func NewSimpleEVSE(conn, device string) (api.Charger, error) {
|
|
log := util.NewLogger("evse")
|
|
|
|
var handler modbus.ClientHandler
|
|
if conn != "" && device != "" {
|
|
return nil, errors.New("cannot define uri and device both")
|
|
}
|
|
if conn != "" {
|
|
handler = modbus.NewTCPClientHandler(conn)
|
|
handler.(*modbus.TCPClientHandler).Timeout = time.Second
|
|
handler.(*modbus.TCPClientHandler).SlaveID = 1
|
|
}
|
|
if device != "" {
|
|
handler = modbus.NewRTUClientHandler(device)
|
|
handler.(*modbus.RTUClientHandler).BaudRate = 9600
|
|
handler.(*modbus.RTUClientHandler).DataBits = 8
|
|
handler.(*modbus.RTUClientHandler).StopBits = 1
|
|
handler.(*modbus.RTUClientHandler).Parity = "N"
|
|
handler.(*modbus.RTUClientHandler).Timeout = time.Second
|
|
handler.(*modbus.RTUClientHandler).SlaveID = 1
|
|
}
|
|
if handler == nil {
|
|
return nil, errors.New("must define either uri or device")
|
|
}
|
|
|
|
evse := &SimpleEVSE{
|
|
log: log,
|
|
client: modbus.NewClient(handler),
|
|
handler: handler,
|
|
}
|
|
|
|
evse.log.WARN.Println("-- experimental --")
|
|
|
|
return evse, nil
|
|
}
|
|
|
|
// Status implements the Charger.Status interface
|
|
func (evse *SimpleEVSE) Status() (api.ChargeStatus, error) {
|
|
b, err := evse.client.ReadHoldingRegisters(evseRegVehicleStatus, 1)
|
|
evse.log.TRACE.Printf("read charge enable (%d): %0 X", evseRegVehicleStatus, b)
|
|
if err != nil {
|
|
evse.handler.Close()
|
|
return api.StatusNone, err
|
|
}
|
|
|
|
switch b[0] {
|
|
case 1: // ready
|
|
return api.StatusA, nil
|
|
case 2: // EV is present
|
|
return api.StatusB, nil
|
|
case 3: // charging
|
|
return api.StatusC, nil
|
|
case 4: // charging with ventilation
|
|
return api.StatusD, nil
|
|
case 5: // failure (e.g. diode check, RCD failure)
|
|
return api.StatusE, nil
|
|
default:
|
|
return api.StatusNone, errors.New("invalid response")
|
|
}
|
|
}
|
|
|
|
// Enabled implements the Charger.Enabled interface
|
|
func (evse *SimpleEVSE) Enabled() (bool, error) {
|
|
b, err := evse.client.ReadHoldingRegisters(evseRegTurnOff, 1)
|
|
evse.log.TRACE.Printf("read charge enable (%d): %0 X", evseRegTurnOff, b)
|
|
if err != nil {
|
|
evse.handler.Close()
|
|
return false, err
|
|
}
|
|
|
|
return b[0] == 1, nil
|
|
}
|
|
|
|
// Enable implements the Charger.Enable interface
|
|
func (evse *SimpleEVSE) Enable(enable bool) error {
|
|
b, err := evse.client.ReadHoldingRegisters(evseRegTurnOff, 1)
|
|
evse.log.TRACE.Printf("read charge enable (%d): %0 X", evseRegTurnOff, b)
|
|
if err != nil {
|
|
evse.handler.Close()
|
|
return err
|
|
}
|
|
|
|
if enable {
|
|
b[0] |= 1
|
|
} else {
|
|
b[0] &= ^byte(1)
|
|
}
|
|
|
|
b, err = evse.client.WriteMultipleRegisters(evseRegTurnOff, 1, b)
|
|
evse.log.TRACE.Printf("write charge enable %d %0X: %0 X", evseRegTurnOff, b, b)
|
|
if err != nil {
|
|
evse.handler.Close()
|
|
}
|
|
|
|
return err
|
|
}
|
|
|
|
// MaxCurrent implements the Charger.MaxCurrent interface
|
|
func (evse *SimpleEVSE) MaxCurrent(current int64) error {
|
|
u := uint16(current)
|
|
|
|
b, err := evse.client.WriteSingleRegister(evseRegAmpsConfig, u)
|
|
evse.log.TRACE.Printf("write max current %d %0X: %0 X", evseRegAmpsConfig, u, b)
|
|
if err != nil {
|
|
evse.handler.Close()
|
|
}
|
|
|
|
return err
|
|
}
|