evcc-io/meter/tasmota.go
2026-02-17 11:10:03 +01:00

109 lines
2.5 KiB
Go

package meter
import (
"math"
"strings"
"time"
"github.com/evcc-io/evcc/api"
"github.com/evcc-io/evcc/meter/tasmota"
"github.com/evcc-io/evcc/util"
)
// Tasmota meter implementation
type Tasmota struct {
conn *tasmota.Connection
usage string
}
// Tasmota meter implementation
func init() {
registry.Add("tasmota", NewTasmotaFromConfig)
}
//go:generate go tool decorate -f decorateTasmota -b *Tasmota -r api.Meter -t api.PhaseVoltages,api.PhaseCurrents,api.PhasePowers
// NewTasmotaFromConfig creates a Tasmota meter from generic config
func NewTasmotaFromConfig(other map[string]any) (api.Meter, error) {
cc := struct {
URI string
User string
Password string
Channel []int
Usage string
Cache time.Duration
}{
Channel: []int{1},
Cache: time.Second,
}
if err := util.DecodeOther(other, &cc); err != nil {
return nil, err
}
return NewTasmota(cc.URI, cc.User, cc.Password, strings.ToLower(cc.Usage), cc.Channel, cc.Cache)
}
// NewTasmota creates Tasmota meter
func NewTasmota(uri, user, password, usage string, channels []int, cache time.Duration) (api.Meter, error) {
conn, err := tasmota.NewConnection(uri, user, password, channels, cache)
if err != nil {
return nil, err
}
c := &Tasmota{
conn: conn,
usage: usage,
}
// check for SML readings
var hasPhases bool
if len(channels) == 1 {
if l1, l2, l3, err := c.conn.Voltages(); err == nil && l1*l2*l3 > 0 {
hasPhases = true
}
}
if hasPhases || len(channels) == 3 {
return decorateTasmota(c, c.voltages, c.currents, c.powers), nil
}
return c, nil
}
var _ api.Meter = (*Tasmota)(nil)
// CurrentPower implements the api.Meter interface
func (c *Tasmota) CurrentPower() (float64, error) {
power, err := c.conn.CurrentPower()
if err != nil {
return 0, err
}
// positive power for pv usage
if c.usage == "pv" {
return math.Abs(power), nil
}
return power, nil
}
var _ api.MeterEnergy = (*Tasmota)(nil)
// TotalEnergy implements the api.MeterEnergy interface
func (c *Tasmota) TotalEnergy() (float64, error) {
return c.conn.TotalEnergy()
}
// powers implements the api.PhasePowers interface
func (c *Tasmota) powers() (float64, float64, float64, error) {
return c.conn.Powers()
}
// voltages implements the api.PhaseVoltages interface
func (c *Tasmota) voltages() (float64, float64, float64, error) {
return c.conn.Voltages()
}
// currents implements the api.PhaseCurrents interface
func (c *Tasmota) currents() (float64, float64, float64, error) {
return c.conn.Currents()
}