133 lines
3.3 KiB
Go
133 lines
3.3 KiB
Go
package charger
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// LICENSE
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// Copyright (c) 2019-2022 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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"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/evcc-io/evcc/util/sponsor"
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)
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// https://shop.alphatec-systeme.de/media/pdf/4d/0e/64/MontageanleitungwlFxbRgs4NKK3.pdf
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// Alphatec charger implementation
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type Alphatec struct {
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conn *modbus.Connection
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}
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const (
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alphatecRegStatus = 0
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alphatecRegEnable = 4
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alphatecRegAmpsConfig = 5
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)
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func init() {
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registry.Add("alphatec", NewAlphatecFromConfig)
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}
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// NewAlphatecFromConfig creates a Alphatec charger from generic config
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func NewAlphatecFromConfig(other map[string]interface{}) (api.Charger, error) {
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cc := modbus.Settings{
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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 NewAlphatec(cc.URI, cc.Device, cc.Comset, cc.Baudrate, modbus.ProtocolFromRTU(cc.RTU), cc.ID)
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}
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// NewAlphatec creates Alphatec charger
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func NewAlphatec(uri, device, comset string, baudrate int, proto modbus.Protocol, slaveID uint8) (api.Charger, error) {
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conn, err := modbus.NewConnection(uri, device, comset, baudrate, proto, slaveID)
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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("alphatec")
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conn.Logger(log.TRACE)
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wb := &Alphatec{
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conn: conn,
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}
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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 *Alphatec) Status() (api.ChargeStatus, error) {
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b, err := wb.conn.ReadHoldingRegisters(alphatecRegStatus, 1)
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if err != nil {
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return api.StatusNone, err
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}
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var res api.ChargeStatus
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switch u := binary.BigEndian.Uint16(b); u {
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case 1:
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res = api.StatusA
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case 2:
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res = api.StatusB
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case 3:
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res = api.StatusC
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default:
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return api.StatusNone, fmt.Errorf("invalid status: %d", u)
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}
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return res, nil
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}
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// Enabled implements the api.Charger interface
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func (wb *Alphatec) Enabled() (bool, error) {
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b, err := wb.conn.ReadHoldingRegisters(alphatecRegEnable, 1)
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if err != nil {
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return false, err
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}
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return binary.BigEndian.Uint16(b) == 0, nil
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}
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// Enable implements the api.Charger interface
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func (wb *Alphatec) Enable(enable bool) error {
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b := make([]byte, 2)
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if !enable {
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binary.BigEndian.PutUint16(b, 1)
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}
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_, err := wb.conn.WriteMultipleRegisters(alphatecRegEnable, 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 *Alphatec) MaxCurrent(current int64) error {
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b := make([]byte, 2)
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binary.BigEndian.PutUint16(b, uint16(current))
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_, err := wb.conn.WriteMultipleRegisters(alphatecRegAmpsConfig, 1, b)
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return err
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}
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