99 lines
2.2 KiB
Go
99 lines
2.2 KiB
Go
package charger
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import (
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"context"
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"fmt"
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"github.com/evcc-io/evcc/api"
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"github.com/evcc-io/evcc/util"
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"github.com/evcc-io/evcc/util/modbus"
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)
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const (
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phxEVSerRegEnable = 20000 // Coil
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phxEVSerRegMaxCurrent = 22000 // Holding
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phxEVSerRegStatus = 24000 // Input
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)
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// PhoenixEVSer is an api.Charger implementation for Phoenix EV-CC-AC1-M wallboxes.
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// It uses Modbus RTU to communicate with the wallbox at configurable modbus client.
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type PhoenixEVSer struct {
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conn *modbus.Connection
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}
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func init() {
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registry.AddCtx("phoenix-ev-ser", NewPhoenixEVSerFromConfig)
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}
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// NewPhoenixEVSerFromConfig creates a Phoenix charger from generic config
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func NewPhoenixEVSerFromConfig(ctx context.Context, other map[string]any) (api.Charger, error) {
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cc := modbus.Settings{
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ID: 1,
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}
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if err := util.DecodeOther(other, &cc); err != nil {
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return nil, err
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}
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return NewPhoenixEVSer(ctx, cc)
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}
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// NewPhoenixEVSer creates a Phoenix charger
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func NewPhoenixEVSer(ctx context.Context, settings modbus.Settings) (*PhoenixEVSer, error) {
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conn, err := settings.Connection(ctx)
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if err != nil {
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return nil, err
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}
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log := util.NewLogger("ev-ser")
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conn.Logger(log.TRACE)
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wb := &PhoenixEVSer{
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conn: conn,
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}
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return wb, nil
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}
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// Status implements the api.Charger interface
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func (wb *PhoenixEVSer) Status() (api.ChargeStatus, error) {
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b, err := wb.conn.ReadInputRegisters(phxEVSerRegStatus, 1)
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if err != nil {
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return api.StatusNone, err
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}
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return api.ChargeStatusString(string(b[0]))
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}
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// Enabled implements the api.Charger interface
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func (wb *PhoenixEVSer) Enabled() (bool, error) {
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b, err := wb.conn.ReadCoils(phxEVSerRegEnable, 1)
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if err != nil {
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return false, err
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}
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return b[0] == 1, nil
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}
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// Enable implements the api.Charger interface
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func (wb *PhoenixEVSer) Enable(enable bool) error {
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var u uint16
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if enable {
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u = modbus.CoilOn
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}
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_, err := wb.conn.WriteSingleCoil(phxEVSerRegEnable, u)
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return err
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}
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// MaxCurrent implements the api.Charger interface
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func (wb *PhoenixEVSer) MaxCurrent(current int64) error {
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if current < 6 {
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return fmt.Errorf("invalid current %d", current)
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}
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_, err := wb.conn.WriteSingleRegister(phxEVSerRegMaxCurrent, uint16(current))
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return err
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}
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