280 lines
8.3 KiB
Go
280 lines
8.3 KiB
Go
package charger
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// LICENSE
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// Copyright (c) 2019-2023 andig
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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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"encoding/binary"
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"fmt"
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"time"
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"github.com/evcc-io/evcc/api"
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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/volkszaehler/mbmd/meters/rs485"
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)
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// https://files2.elv.com/public/25/2522/252210/Internet/252210_modbus_tcp_register.pdf
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// Em2Go charger implementation
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type Em2Go struct {
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conn *modbus.Connection
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}
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const (
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em2GoRegStatus = 0 // Uint16 RO ENUM
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em2goRegConnectorState = 2 // Uint16 RO ENUM
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em2goRegErrorCode = 4 // Uint16 RO ENUM
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em2GoRegCurrents = 6 // 3xUint16 RO 0.1A
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em2GoRegPower = 12 // Uint32 RO 1W
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em2GoRegPowers = 16 // 3xUint16 RO 1W
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em2GoRegEnergy = 28 // Uint16 RO 0.1KWh
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em2GoRegMaxCurrent = 32 // Uint16 RO 0.1A
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em2GoRegMinCurrent = 34 // Uint16 RO 0.1A
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em2goRegCableMaxCurrent = 36 // Uint16 RO 0.1A
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em2GoRegSerial = 38 // Chr[16] RO UTF16
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em2GoRegChargedEnergy = 72 // Uint16 RO 0.1kWh
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em2GoRegChargeDuration = 78 // Uint32 RO 1s
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em2goRegSafeCurrent = 87 // Uint16 WR 0.1A
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em2goRegCommTimeout = 89 // Uint16 WR 1s
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em2goRegCurrentLimit = 91 // Uint16 WR 0.1A
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em2GoRegChargeMode = 93 // Uint16 WR ENUM
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em2GoRegChargeCommand = 95 // Uint16 WR ENUM
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em2goRegVoltages = 109 // 3xUint16 RO 0.1V
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)
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func init() {
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registry.Add("em2go", NewEm2GoFromConfig)
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}
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// NewEm2GoFromConfig creates a Em2Go charger from generic config
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func NewEm2GoFromConfig(other map[string]interface{}) (api.Charger, error) {
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cc := modbus.TcpSettings{
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ID: 255,
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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 NewEm2Go(cc.URI, cc.ID)
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}
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// NewEm2Go creates Em2Go charger
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func NewEm2Go(uri string, slaveID uint8) (api.Charger, error) {
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uri = util.DefaultPort(uri, 502)
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conn, err := modbus.NewConnection(uri, "", "", 0, modbus.Tcp, slaveID)
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if err != nil {
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return nil, err
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}
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log := util.NewLogger("em2go")
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conn.Logger(log.TRACE)
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wb := &Em2Go{
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conn: conn,
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}
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// set charge on command
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// b := make([]byte, 2)
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// _, err = wb.conn.WriteMultipleRegisters(em2GoRegChargeMode, 1,b)
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return wb, err
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}
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// Status implements the api.Charger interface
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func (wb *Em2Go) Status() (api.ChargeStatus, error) {
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b, err := wb.conn.ReadHoldingRegisters(em2GoRegStatus, 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 binary.BigEndian.Uint16(b) {
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case 1:
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return api.StatusA, nil
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case 2, 3:
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return api.StatusB, nil
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case 4, 6:
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return api.StatusC, nil
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case 5, 7:
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return api.StatusF, nil
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default:
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return api.StatusNone, fmt.Errorf("invalid status: %0x", 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 *Em2Go) Enabled() (bool, error) {
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b, err := wb.conn.ReadHoldingRegisters(em2GoRegChargeCommand, 1)
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if err != nil {
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return false, err
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}
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u := binary.BigEndian.Uint16(b)
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return u == 1, nil
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}
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// Enable implements the api.Charger interface
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func (wb *Em2Go) Enable(enable bool) error {
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b := make([]byte, 2)
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binary.BigEndian.PutUint16(b, map[bool]uint16{true: 1, false: 2}[enable])
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_, err := wb.conn.WriteMultipleRegisters(em2GoRegChargeCommand, 1, b)
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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 *Em2Go) MaxCurrent(current int64) error {
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return wb.MaxCurrentMillis(float64(current))
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}
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var _ api.ChargerEx = (*Em2Go)(nil)
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// MaxCurrentMillis implements the api.ChargerEx interface
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func (wb *Em2Go) MaxCurrentMillis(current float64) error {
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b := make([]byte, 2)
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binary.BigEndian.PutUint16(b, uint16(10*current))
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_, err := wb.conn.WriteMultipleRegisters(em2goRegCurrentLimit, 1, b)
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return err
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}
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var _ api.Meter = (*Em2Go)(nil)
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// CurrentPower implements the api.Meter interface
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func (wb *Em2Go) CurrentPower() (float64, error) {
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b, err := wb.conn.ReadHoldingRegisters(em2GoRegPower, 2)
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if err != nil {
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return 0, err
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}
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return rs485.RTUUint32ToFloat64(b), nil
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}
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var _ api.MeterEnergy = (*Em2Go)(nil)
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// TotalEnergy implements the api.MeterEnergy interface
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func (wb *Em2Go) TotalEnergy() (float64, error) {
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b, err := wb.conn.ReadHoldingRegisters(em2GoRegEnergy, 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.Uint16(b)) / 10, nil
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}
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var _ api.PhaseCurrents = (*Em2Go)(nil)
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// Currents implements the api.PhaseCurrents interface
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func (wb *Em2Go) Currents() (float64, float64, float64, error) {
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b, err := wb.conn.ReadHoldingRegisters(em2GoRegCurrents, 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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return float64(binary.BigEndian.Uint16(b)) / 10,
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float64(binary.BigEndian.Uint16(b[4:])) / 10,
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float64(binary.BigEndian.Uint16(b[8:])) / 10, nil
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}
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var _ api.PhaseVoltages = (*Em2Go)(nil)
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// Currents implements the api.PhaseVoltages interface
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func (wb *Em2Go) Voltages() (float64, float64, float64, error) {
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b, err := wb.conn.ReadHoldingRegisters(em2goRegVoltages, 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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return float64(binary.BigEndian.Uint16(b)) / 10,
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float64(binary.BigEndian.Uint16(b[4:])) / 10,
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float64(binary.BigEndian.Uint16(b[8:])) / 10, nil
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}
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var _ api.ChargeRater = (*Em2Go)(nil)
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// ChargedEnergy implements the api.ChargeRater interface
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func (wb *Em2Go) ChargedEnergy() (float64, error) {
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b, err := wb.conn.ReadHoldingRegisters(em2GoRegChargedEnergy, 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.Uint16(b)) / 10, nil
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}
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var _ api.ChargeTimer = (*Em2Go)(nil)
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// ChargingTime implements the api.ChargeTimer interface
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func (wb *Em2Go) ChargingTime() (time.Duration, error) {
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b, err := wb.conn.ReadHoldingRegisters(em2GoRegChargeDuration, 2)
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if err != nil {
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return 0, err
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}
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return time.Duration(binary.BigEndian.Uint32(b)) * time.Second, nil
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}
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var _ api.Diagnosis = (*Em2Go)(nil)
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// Diagnose implements the api.Diagnosis interface
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func (wb *Em2Go) Diagnose() {
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if b, err := wb.conn.ReadHoldingRegisters(em2GoRegStatus, 1); err == nil {
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fmt.Printf("\tCharging Station Status:\t%d\n", binary.BigEndian.Uint16(b))
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}
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if b, err := wb.conn.ReadHoldingRegisters(em2goRegConnectorState, 1); err == nil {
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fmt.Printf("\tConnector State:\t%d\n", binary.BigEndian.Uint16(b))
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}
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if b, err := wb.conn.ReadHoldingRegisters(em2goRegErrorCode, 1); err == nil {
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fmt.Printf("\tError Code:\t%d\n", binary.BigEndian.Uint16(b))
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}
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if b, err := wb.conn.ReadHoldingRegisters(em2GoRegMaxCurrent, 1); err == nil {
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fmt.Printf("\tEVSE Max. Current:\t%.1fA\n", float64(binary.BigEndian.Uint16(b)/10))
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}
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if b, err := wb.conn.ReadHoldingRegisters(em2GoRegMinCurrent, 1); err == nil {
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fmt.Printf("\tEVSE Min. Current:\t%.1fA\n", float64(binary.BigEndian.Uint16(b)/10))
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}
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if b, err := wb.conn.ReadHoldingRegisters(em2goRegCableMaxCurrent, 1); err == nil {
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fmt.Printf("\tCable Max. Current:\t%.1fA\n", float64(binary.BigEndian.Uint16(b)/10))
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}
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var serial []byte
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for reg := 0; reg < 8; reg++ {
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b, err := wb.conn.ReadHoldingRegisters(em2GoRegSerial+2*uint16(reg), 2)
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if err != nil {
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return
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}
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serial = append(serial, b...)
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}
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fmt.Printf("\tSerial: %s\n", string(serial))
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if b, err := wb.conn.ReadHoldingRegisters(em2goRegSafeCurrent, 1); err == nil {
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fmt.Printf("\tSafe Current:\t%.1fA\n", float64(binary.BigEndian.Uint16(b)/10))
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}
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if b, err := wb.conn.ReadHoldingRegisters(em2goRegCommTimeout, 1); err == nil {
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fmt.Printf("\tConnection Timeout:\t%d\n", binary.BigEndian.Uint16(b))
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}
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if b, err := wb.conn.ReadHoldingRegisters(em2goRegCurrentLimit, 1); err == nil {
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fmt.Printf("\tCurrent Limit:\t%.1fA\n", float64(binary.BigEndian.Uint16(b)/10))
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}
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if b, err := wb.conn.ReadHoldingRegisters(em2GoRegChargeMode, 1); err == nil {
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fmt.Printf("\tCharge Mode:\t%d\n", binary.BigEndian.Uint16(b))
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}
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if b, err := wb.conn.ReadHoldingRegisters(em2GoRegChargeCommand, 1); err == nil {
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fmt.Printf("\tCharge Command:\t%d\n", binary.BigEndian.Uint16(b))
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}
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}
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