129 lines
2.9 KiB
Go
129 lines
2.9 KiB
Go
package charger
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import (
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"errors"
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"fmt"
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"strings"
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"github.com/andig/evcc/api"
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"github.com/andig/evcc/util"
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"github.com/andig/evcc/util/request"
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)
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// Shelly api homepage
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// https://shelly-api-docs.shelly.cloud/#common-http-api
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// shellyRelayResponse provides the evcc shelly charger enabled information
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type shellyRelayResponse struct {
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Ison bool `json:"ison,omitempty"`
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}
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// shellyStatusResponse provides the evcc shelly charger current power information
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type shellyStatusResponse struct {
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Meters []struct {
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Power float64 `json:"power,omitempty"`
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} `json:"meters,omitempty"`
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}
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// Shelly charger implementation
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type Shelly struct {
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*request.Helper
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uri string
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channel int
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standbypower float64
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}
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func init() {
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registry.Add("shelly", NewShellyFromConfig)
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}
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// NewShellyFromConfig creates a Shelly charger from generic config
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func NewShellyFromConfig(other map[string]interface{}) (api.Charger, error) {
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cc := struct {
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URI string
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Channel int
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StandbyPower float64
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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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if cc.URI == "" {
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return nil, errors.New("missing uri")
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}
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return NewShelly(cc.URI, cc.Channel, cc.StandbyPower)
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}
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// NewShelly creates Shelly charger
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func NewShelly(uri string, channel int, standbypower float64) (*Shelly, error) {
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c := &Shelly{
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Helper: request.NewHelper(util.NewLogger("shelly")),
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uri: strings.TrimRight(uri, "/"),
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channel: channel,
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standbypower: standbypower,
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}
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return c, nil
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}
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// Enabled implements the api.Charger interface
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func (c *Shelly) Enabled() (bool, error) {
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var resp shellyRelayResponse
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err := c.GetJSON(fmt.Sprintf("%s/relay/%d", c.uri, c.channel), &resp)
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return resp.Ison, err
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}
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// Enable implements the api.Charger interface
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func (c *Shelly) Enable(enable bool) error {
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var resp shellyRelayResponse
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onoff := map[bool]string{true: "on", false: "off"}
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err := c.GetJSON(fmt.Sprintf("%s/relay/%d?turn=%s", c.uri, c.channel, onoff[enable]), &resp)
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switch {
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case err != nil:
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return err
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case enable && !resp.Ison:
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return errors.New("switchOn failed")
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case !enable && resp.Ison:
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return errors.New("switchOff failed")
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default:
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return nil
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}
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}
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// MaxCurrent implements the api.Charger interface
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func (c *Shelly) MaxCurrent(current int64) error {
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return nil
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}
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// Status implements the api.Charger interface
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func (c *Shelly) Status() (api.ChargeStatus, error) {
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power, err := c.CurrentPower()
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if power > 0 {
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return api.StatusC, err
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}
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return api.StatusB, err
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}
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var _ api.Meter = (*Shelly)(nil)
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// CurrentPower implements the api.Meter interface
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func (c *Shelly) CurrentPower() (float64, error) {
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var resp shellyStatusResponse
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err := c.GetJSON(fmt.Sprintf("%s/%s", c.uri, "status"), &resp)
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if c.channel >= len(resp.Meters) {
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return 0, errors.New("invalid channel, power meter missing")
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}
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power := resp.Meters[c.channel].Power
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// ignore standby power
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if power < c.standbypower {
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power = 0
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}
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return power, err
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}
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