252 lines
6.8 KiB
Go
252 lines
6.8 KiB
Go
package charger
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// LICENSE
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// Copyright (c) evcc.io (andig, naltatis, premultiply)
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// This module is NOT covered by the MIT license. All rights reserved.
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// The above copyright notice and this permission notice shall be included in all
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// copies or substantial portions of the Software.
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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// SOFTWARE.
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import (
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"context"
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"encoding/binary"
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"errors"
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"fmt"
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"github.com/evcc-io/evcc/api"
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"github.com/evcc-io/evcc/api/implement"
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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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"github.com/evcc-io/evcc/util/sponsor"
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)
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const (
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cfosRegDisconnectCp = 8086
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cfosRegRelaySelect = 8087
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cfosRegStatus = 8092
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cfosRegMaxCurrent = 8093
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cfosRegEnable = 8094
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cfosRegLastRfid = 8096
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cfosRegMeter = 8112
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cfosRegSolarEnabled = 8113
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cfosRegMeterFlags = 8057
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cfosRegEnergy = 8058 // 4 rw Aktiver Import [Wh]
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cfosRegPower = 8062 // 2 r Aktive Leistung [W]
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cfosRegCurrents = 8064 // 2 r Momentaner Strom L1 [0.1 A]
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)
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// CfosPowerBrain is an charger implementation for cFos PowerBrain wallboxes.
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// It uses Modbus TCP to communicate at modbus client id 1 and power meters at id 2 and 3.
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// https://www.cfos-emobility.de/en-gb/cfos-power-brain/modbus-registers.htm
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type CfosPowerBrain struct {
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implement.Caps
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conn *modbus.Connection
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}
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func init() {
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registry.AddCtx("cfos", NewCfosPowerBrainFromConfig)
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}
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// NewCfosPowerBrainFromConfig creates a cFos charger from generic config
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func NewCfosPowerBrainFromConfig(ctx context.Context, other map[string]any) (api.Charger, error) {
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cc := modbus.TcpSettings{
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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 NewCfosPowerBrain(ctx, cc)
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}
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// NewCfosPowerBrain creates a cFos charger
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func NewCfosPowerBrain(ctx context.Context, settings modbus.TcpSettings) (api.Charger, error) {
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settings.URI = util.DefaultPort(settings.URI, 4701)
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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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if !sponsor.IsAuthorized() {
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return nil, api.ErrSponsorRequired
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}
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log := util.NewLogger("cfos")
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conn.Logger(log.TRACE)
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wb := &CfosPowerBrain{
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Caps: implement.New(),
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conn: conn,
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}
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// decorate meter
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if b, err := wb.conn.ReadHoldingRegisters(cfosRegMeter, 1); err == nil && binary.BigEndian.Uint16(b) != 0 {
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implement.Has(wb, implement.Meter(wb.currentPower))
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implement.Has(wb, implement.MeterEnergy(wb.totalEnergy))
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if b, err := wb.conn.ReadHoldingRegisters(cfosRegMeterFlags, 1); err == nil && binary.BigEndian.Uint16(b) != 0 {
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implement.Has(wb, implement.PhaseCurrents(wb.currents))
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}
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}
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// decorate phases
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if b, err := wb.conn.ReadHoldingRegisters(cfosRegSolarEnabled, 1); err == nil && binary.BigEndian.Uint16(b)&(1<<8) != 0 {
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implement.Has(wb, implement.PhaseSwitcher(wb.phases1p3p))
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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 *CfosPowerBrain) Status() (api.ChargeStatus, error) {
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b, err := wb.conn.ReadHoldingRegisters(cfosRegStatus, 1)
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if err != nil {
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return api.StatusNone, err
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}
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switch b[1] {
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case 0: // warten
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return api.StatusA, nil
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case 1: // Fahrzeug erkannt
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return api.StatusB, nil
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case 2: // laden
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return api.StatusC, nil
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case 5: // Übertemperatur
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return api.StatusNone, errors.New("temperature exceeded")
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default:
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return api.StatusNone, fmt.Errorf("invalid status: %d", b[1])
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}
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}
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// Enabled implements the api.Charger interface
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func (wb *CfosPowerBrain) Enabled() (bool, error) {
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b, err := wb.conn.ReadHoldingRegisters(cfosRegEnable, 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[1] == 1, nil
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}
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// Enable implements the api.Charger interface
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func (wb *CfosPowerBrain) Enable(enable bool) error {
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var u uint16
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if enable {
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u = 1
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}
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_, err := wb.conn.WriteSingleRegister(cfosRegEnable, 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 *CfosPowerBrain) MaxCurrent(current int64) error {
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return wb.MaxCurrentMillis(float64(current))
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}
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var _ api.ChargerEx = (*CfosPowerBrain)(nil)
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// MaxCurrentMillis implements the api.ChargerEx interface
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func (wb *CfosPowerBrain) MaxCurrentMillis(current float64) error {
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_, err := wb.conn.WriteSingleRegister(cfosRegMaxCurrent, uint16(current*10))
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return err
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}
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// currentPower implements the api.Meter interface
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func (wb *CfosPowerBrain) currentPower() (float64, error) {
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b, err := wb.conn.ReadHoldingRegisters(cfosRegPower, 2)
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if err != nil {
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return 0, err
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}
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return float64(binary.BigEndian.Uint32(b)), nil
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}
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// totalEnergy implements the api.MeterEnergy interface
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func (wb *CfosPowerBrain) totalEnergy() (float64, error) {
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b, err := wb.conn.ReadHoldingRegisters(cfosRegEnergy, 4)
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if err != nil {
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return 0, err
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}
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res := float64(binary.BigEndian.Uint64(b)) / 1e3
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// cfos wallboxes sometimes return 0 erroneously shortly after startup
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// to work around this, we retry once more, and if it is still 0, we return ErrMustRetry
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//
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// this has the drawback with new wallboxes that actually have 0 total energy
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// it will return ErrMustRetry until the wallbox has been used
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//
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// see https://github.com/evcc-io/evcc/discussions/12886
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if res == 0 {
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b, err = wb.conn.ReadHoldingRegisters(cfosRegEnergy, 4)
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if err != nil {
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return 0, err
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}
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res = float64(binary.BigEndian.Uint64(b)) / 1e3
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if res == 0 {
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return 0, api.ErrMustRetry
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}
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}
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return res, nil
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}
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// currents implements the api.PhaseCurrents interface
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func (wb *CfosPowerBrain) currents() (float64, float64, float64, error) {
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b, err := wb.conn.ReadHoldingRegisters(cfosRegCurrents, 6)
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if err != nil {
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return 0, 0, 0, err
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}
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var res [3]float64
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for i := range res {
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res[i] = float64(binary.BigEndian.Uint32(b[4*i:])) / 10
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}
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return res[0], res[1], res[2], nil
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}
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// phases1p3p implements the api.PhaseSwitcher interface
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func (wb *CfosPowerBrain) phases1p3p(phases int) error {
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if phases == 3 {
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phases = 0
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}
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_, err := wb.conn.WriteSingleRegister(cfosRegRelaySelect, uint16(phases))
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return err
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}
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var _ api.Resurrector = (*CfosPowerBrain)(nil)
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// WakeUp implements the api.Resurrector interface
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func (wb *CfosPowerBrain) WakeUp() error {
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_, err := wb.conn.WriteSingleRegister(cfosRegDisconnectCp, uint16(5))
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return err
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}
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var _ api.Identifier = (*CfosPowerBrain)(nil)
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// Identify implements the api.Identifier interface
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func (wb *CfosPowerBrain) Identify() (string, error) {
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b, err := wb.conn.ReadHoldingRegisters(cfosRegLastRfid, 15)
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if err != nil {
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return "", err
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}
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return bytesAsString(b), nil
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}
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