Add Huawei AC charger (#10408)

charger/huawei-ac.go

@@ -0,0 +1,204 @@
+package charger
+
+// LICENSE
+
+// Copyright (c) 2023 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 (
+	"encoding/binary"
+	"fmt"
+	"math"
+
+	"github.com/evcc-io/evcc/api"
+	"github.com/evcc-io/evcc/core/loadpoint"
+	"github.com/evcc-io/evcc/util"
+	"github.com/evcc-io/evcc/util/modbus"
+	"github.com/evcc-io/evcc/util/sponsor"
+)
+
+type HuaweiACCharger struct {
+	conn *modbus.Connection
+	curr float64
+	lp   loadpoint.API
+}
+
+const (
+	huaweiRegVoltages = 0x1000 // uint32 * 3
+	huaweiRegCurrents = 0x1006 // uint32 * 3
+	huaweiRegPower    = 0x100c // uint32
+	huaweiRegStatus   = 0x100e // uint32
+	huaweiRegMaxPower = 0x2000 // uint32
+	huaweiRegControl  = 0x2006 // uint16
+)
+
+func init() {
+	registry.Add("huawei-ac", NewHuaweiACChargerFromConfig)
+}
+
+// NewHuaweiACChargerFromConfig creates a HuaweiACCharger charger from generic config
+func NewHuaweiACChargerFromConfig(other map[string]interface{}) (api.Charger, error) {
+	cc := modbus.TcpSettings{
+		ID: 255,
+	}
+
+	if err := util.DecodeOther(other, &cc); err != nil {
+		return nil, err
+	}
+
+	return NewHuaweiACCharger(cc.URI, cc.ID)
+}
+
+// NewHuaweiACCharger creates a HuaweiACCharger charger
+func NewHuaweiACCharger(uri string, slaveID uint8) (api.Charger, error) {
+	conn, err := modbus.NewConnection(uri, "", "", 0, modbus.Tcp, slaveID)
+	if err != nil {
+		return nil, err
+	}
+
+	if !sponsor.IsAuthorized() {
+		return nil, api.ErrSponsorRequired
+	}
+
+	log := util.NewLogger("huawei-ac")
+	conn.Logger(log.TRACE)
+
+	wb := &HuaweiACCharger{
+		conn: conn,
+		curr: 6,
+	}
+
+	return wb, err
+}
+
+func (wb *HuaweiACCharger) setCurrent(current float64) error {
+	var phases int
+	// get (expectedly) active phases from loadpoint
+	if wb.lp != nil {
+		phases = wb.lp.GetPhases()
+	}
+	if phases == 0 {
+		phases = 3
+	}
+
+	b := make([]byte, 4)
+	binary.BigEndian.PutUint32(b, uint32(math.Trunc(230.0*current*float64(phases)*10.0)))
+
+	_, err := wb.conn.WriteMultipleRegisters(huaweiRegMaxPower, 2, b)
+
+	return err
+}
+
+// Status implements the api.Charger interface
+func (wb *HuaweiACCharger) Status() (api.ChargeStatus, error) {
+	b, err := wb.conn.ReadHoldingRegisters(huaweiRegControl, 1)
+	if err != nil {
+		return api.StatusNone, err
+	}
+
+	//ToDo: Real status
+	switch u := binary.BigEndian.Uint16(b); u {
+	case 0:
+		return api.StatusA, nil
+	case 1:
+		return api.StatusB, nil
+	case 2:
+		return api.StatusC, nil
+	default:
+		return api.StatusNone, fmt.Errorf("invalid status: %d", u)
+	}
+}
+
+// Enabled implements the api.Charger interface
+func (wb *HuaweiACCharger) Enabled() (bool, error) {
+	b, err := wb.conn.ReadHoldingRegisters(huaweiRegMaxPower, 2)
+	if err != nil {
+		return false, err
+	}
+
+	return binary.BigEndian.Uint32(b) > 0, nil
+}
+
+// Enable implements the api.Charger interface
+func (wb *HuaweiACCharger) Enable(enable bool) error {
+	var curr float64
+	if enable {
+		curr = wb.curr
+	}
+
+	return wb.setCurrent(curr)
+}
+
+// MaxCurrent implements the api.Charger interface
+func (wb *HuaweiACCharger) MaxCurrent(current int64) error {
+	return wb.MaxCurrentMillis(float64(current))
+}
+
+var _ api.ChargerEx = (*HuaweiACCharger)(nil)
+
+// MaxCurrent implements the api.ChargerEx interface
+func (wb *HuaweiACCharger) MaxCurrentMillis(current float64) error {
+	if current < 6 {
+		return fmt.Errorf("invalid current %.1f", current)
+	}
+
+	err := wb.setCurrent(current)
+	if err == nil {
+		wb.curr = current
+	}
+
+	return err
+}
+
+var _ api.Meter = (*HuaweiACCharger)(nil)
+
+// currentPower implements the api.Meter interface
+func (wb *HuaweiACCharger) CurrentPower() (float64, error) {
+	b, err := wb.conn.ReadHoldingRegisters(huaweiRegPower, 2)
+	if err != nil {
+		return 0, err
+	}
+
+	return float64(binary.BigEndian.Uint32(b)), nil
+}
+
+var _ api.PhaseCurrents = (*HuaweiACCharger)(nil)
+
+// currents implements the api.PhaseCurrents interface
+func (wb *HuaweiACCharger) Currents() (float64, float64, float64, error) {
+	return wb.getPhaseValues(huaweiRegCurrents)
+}
+
+var _ api.PhaseVoltages = (*HuaweiACCharger)(nil)
+
+// voltages implements the api.PhaseVoltages interface
+func (wb *HuaweiACCharger) Voltages() (float64, float64, float64, error) {
+	return wb.getPhaseValues(huaweiRegVoltages)
+}
+
+// getPhaseValues returns 3 sequential phase values
+func (wb *HuaweiACCharger) getPhaseValues(reg uint16) (float64, float64, float64, error) {
+	b, err := wb.conn.ReadHoldingRegisters(reg, 6)
+	if err != nil {
+		return 0, 0, 0, err
+	}
+
+	var res [3]float64
+	for i := 0; i < 3; i++ {
+		res[i] = float64(binary.BigEndian.Uint32(b[4*i:])) / 10
+	}
+
+	return res[0], res[1], res[2], nil
+}

templates/definition/charger/huawai-ac.yaml

@@ -0,0 +1,14 @@
+template: huawei-ac
+products:
+  - brand: Huawei
+    description:
+      generic: FusionCharge AC
+requirements:
+  evcc: ["sponsorship"]
+params:
+  - name: modbus
+    choice: ["tcpip"]
+    id: 255
+render: |
+  type: huawei-ac
+  {{- include "modbus" . }}

templates/evcc.io/brands.json

@@ -31,6 +31,7 @@
   "Heidelberg",
   "Hesotec",
   "Homecharge",
+  "Huawei",
   "Innogy",
   "INRO",
   "Juice",