Add Sigenergy EVAC series charger (#22986)

charger/sigenergy.go

@@ -0,0 +1,193 @@
+package charger
+
+// LICENSE
+
+// Copyright (c) 2025 premultiply
+
+// This module is NOT covered by the MIT license. All rights reserved.
+
+// The above copyright notice and this permission notice shall be included in all
+// copies or substantial portions of the Software.
+
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+// SOFTWARE.
+
+import (
+	"context"
+	"encoding/binary"
+	"fmt"
+
+	"github.com/evcc-io/evcc/api"
+	"github.com/evcc-io/evcc/util"
+	"github.com/evcc-io/evcc/util/modbus"
+	"github.com/evcc-io/evcc/util/sponsor"
+)
+
+// Sigenergy charger implementation
+type Sigenergy struct {
+	log     *util.Logger
+	conn    *modbus.Connection
+	enabled bool
+}
+
+const (
+	regSigSystemState         = 32000 // System states according to IEC61851-1 definition
+	regSigTotalEnergyConsumed = 32001 // kWh*100, total energy consumed during charging
+	regSigChargingPower       = 32003 // W, instantaneous charging power
+	regSigStartStop           = 42000 // Start/Stop charger (0: Start 1: Stop), WO
+	regSigOutputCurrent       = 42001 // Amperes, R/W, charger output current ([6, X] X is the smaller value between the rated current and the AC-Charger input breaker rated current.)
+)
+
+func init() {
+	registry.AddCtx("sigenergy", NewSigenergyFromConfig)
+}
+
+// NewSigenergyFromConfig creates a new Sigenergy ModbusTCP charger
+func NewSigenergyFromConfig(ctx context.Context, other map[string]interface{}) (api.Charger, error) {
+	cc := modbus.TcpSettings{
+		ID: 1,
+	}
+
+	if err := util.DecodeOther(other, &cc); err != nil {
+		return nil, err
+	}
+
+	return NewSigenergy(ctx, cc.URI, cc.ID)
+}
+
+// NewSigenergy creates a new charger
+func NewSigenergy(ctx context.Context, uri string, slaveID uint8) (*Sigenergy, error) {
+	conn, err := modbus.NewConnection(ctx, uri, "", "", 0, modbus.Tcp, slaveID)
+	if err != nil {
+		return nil, err
+	}
+
+	if !sponsor.IsAuthorized() {
+		return nil, api.ErrSponsorRequired
+	}
+
+	log := util.NewLogger("sigenergy")
+	conn.Logger(log.TRACE)
+
+	wb := &Sigenergy{
+		log:  log,
+		conn: conn,
+	}
+
+	return wb, nil
+}
+
+// Status implements the api.Charger interface
+func (wb *Sigenergy) Status() (api.ChargeStatus, error) {
+	b, err := wb.conn.ReadHoldingRegisters(regSigSystemState, 1)
+	if err != nil {
+		return api.StatusNone, err
+	}
+
+	switch state := binary.BigEndian.Uint16(b); state {
+	case 0x01: // A1/A2
+		return api.StatusA, nil
+	case 0x02: // B1
+		wb.enabled = false // B1 indicates the charger is not enabled
+		return api.StatusB, nil
+	case 0x03: // B2
+		wb.enabled = true // B2 indicates the charger is enabled
+		return api.StatusB, nil
+	case 0x04: // C1
+		wb.enabled = false // C1 indicates the charger is not enabled
+		return api.StatusC, nil
+	case 0x05: // C2
+		wb.enabled = true // C2 indicates the charger is enabled
+		return api.StatusC, nil
+	default:
+		return api.StatusNone, fmt.Errorf("invalid status: %d", state)
+	}
+}
+
+// Enabled implements the api.Charger interface
+func (wb *Sigenergy) Enabled() (bool, error) {
+	return wb.enabled, nil
+}
+
+// Enable implements the api.Charger interface
+func (wb *Sigenergy) Enable(enable bool) error {
+	var s uint16
+	if !enable {
+		s = 1
+	}
+
+	_, err := wb.conn.WriteSingleRegister(regSigStartStop, s)
+	return err
+}
+
+// MaxCurrent implements the api.Charger interface
+func (wb *Sigenergy) MaxCurrent(current int64) error {
+	return wb.MaxCurrentMillis(float64(current))
+}
+
+var _ api.ChargerEx = (*Sigenergy)(nil)
+
+// MaxCurrentMillis implements the api.ChargerEx interface
+func (wb *Sigenergy) MaxCurrentMillis(current float64) error {
+	if current < 6 {
+		return fmt.Errorf("invalid current %.1f", current)
+	}
+
+	b := make([]byte, 4)
+
+	binary.BigEndian.PutUint32(b, uint32(current*100)) // Convert to mA (100x for 0.01 A resolution)
+
+	_, err := wb.conn.WriteMultipleRegisters(regSigOutputCurrent, 2, b)
+
+	return err
+}
+
+var _ api.Meter = (*Sigenergy)(nil)
+
+// CurrentPower implements the api.Meter interface
+func (wb *Sigenergy) CurrentPower() (float64, error) {
+	b, err := wb.conn.ReadHoldingRegisters(regSigChargingPower, 2)
+	if err != nil {
+		return 0, err
+	}
+
+	return float64(binary.BigEndian.Uint32(b)), nil
+}
+
+var _ api.MeterEnergy = (*Sigenergy)(nil)
+
+// TotalEnergy implements the api.MeterEnergy interface
+func (wb *Sigenergy) TotalEnergy() (float64, error) {
+	b, err := wb.conn.ReadHoldingRegisters(regSigTotalEnergyConsumed, 2)
+	if err != nil {
+		return 0, err
+	}
+
+	// U32 register with gain 100, divide by 100 to get kWh
+	return float64(binary.BigEndian.Uint32(b)) / 100, nil
+}
+
+var _ api.Diagnosis = (*Sigenergy)(nil)
+
+// Diagnose implements the api.Diagnosis interface
+func (wb *Sigenergy) Diagnose() {
+	if b, err := wb.conn.ReadHoldingRegisters(regSigSystemState, 1); err == nil {
+		state := binary.BigEndian.Uint16(b)
+		stateNames := []string{"System init", "A1/A2", "B1", "B2", "C1", "C2", "F", "E"}
+		stateName := "Unknown"
+		if int(state) < len(stateNames) {
+			stateName = stateNames[state]
+		}
+		fmt.Printf("\tSystem State:\t%d (%s)\n", state, stateName)
+	}
+
+	if b, err := wb.conn.ReadHoldingRegisters(regSigOutputCurrent, 2); err == nil {
+		current := float64(binary.BigEndian.Uint32(b)) / 100
+		fmt.Printf("\tOutput Current:\t%.2f A\n", current)
+	}
+}

templates/definition/charger/sigenergy.yaml

@@ -0,0 +1,15 @@
+template: sigenergy
+products:
+  - brand: Sigenergy
+    description:
+      generic: EVAC series
+capabilities: ["mA"]
+requirements:
+  evcc: ["sponsorship"]
+params:
+  - name: modbus
+    choice: ["tcpip"]
+    id: 1
+render: |
+  type: sigenergy
+  {{- include "modbus" . }}