160 lines
3.6 KiB
Go
160 lines
3.6 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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"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/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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curr uint16
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}
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const (
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alphatecRegStatus = 0
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alphatecRegAmpsConfig = 5
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)
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func init() {
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registry.AddCtx("alphatec", NewAlphatecFromConfig)
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}
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// NewAlphatecFromConfig creates a Alphatec charger from generic config
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func NewAlphatecFromConfig(ctx context.Context, other map[string]any) (api.Charger, error) {
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cc := modbus.Settings{
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ID: 1,
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Delay: 20 * time.Millisecond,
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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(ctx, cc)
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}
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// NewAlphatec creates Alphatec charger
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func NewAlphatec(ctx context.Context, settings modbus.Settings) (api.Charger, error) {
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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("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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curr: 6,
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}
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// get initial state from charger
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curr, err := wb.getCurrent()
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if err != nil {
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return nil, fmt.Errorf("current limit: %w", err)
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}
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if curr > 0 {
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wb.curr = curr
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}
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return wb, err
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}
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func (wb *Alphatec) setCurrent(current uint16) error {
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b := make([]byte, 2)
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binary.BigEndian.PutUint16(b, 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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func (wb *Alphatec) getCurrent() (uint16, error) {
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b, err := wb.conn.ReadHoldingRegisters(alphatecRegAmpsConfig, 1)
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if err != nil {
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return 0, err
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}
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return binary.BigEndian.Uint16(b), nil
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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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switch u := binary.BigEndian.Uint16(b); u {
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case 1:
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return api.StatusA, nil
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case 2, 8:
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return api.StatusB, nil
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case 3:
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return api.StatusC, nil
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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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}
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// Enabled implements the api.Charger interface
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func (wb *Alphatec) Enabled() (bool, error) {
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curr, err := wb.getCurrent()
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return curr >= 6, err
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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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var curr uint16
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if enable {
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curr = wb.curr
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}
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return wb.setCurrent(curr)
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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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if current < 6 {
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return fmt.Errorf("invalid current %d", current)
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}
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err := wb.setCurrent(uint16(current))
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if err == nil {
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wb.curr = uint16(current)
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}
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return err
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}
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