sunspec: add bool getter (#31482)
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andig
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4 changed files with 195 additions and 23 deletions
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@ -22,6 +22,7 @@ type ModbusSunspec struct {
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device *sunsdev.SunSpec
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op modbus.SunSpecOperation
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scale float64
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mask uint64
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}
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func init() {
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@ -34,6 +35,7 @@ func NewModbusSunspecFromConfig(ctx context.Context, other map[string]any) (Plug
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modbus.Settings `mapstructure:",squash"`
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Value []string
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Scale float64
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BitMask string
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Delay time.Duration
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ConnectDelay time.Duration
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Timeout time.Duration
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@ -45,6 +47,14 @@ func NewModbusSunspecFromConfig(ctx context.Context, other map[string]any) (Plug
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return nil, err
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}
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var mask uint64
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if cc.BitMask != "" {
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var err error
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if mask, err = modbus.DecodeMask(cc.BitMask); err != nil {
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return nil, err
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}
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}
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modbus.Lock()
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defer modbus.Unlock()
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@ -104,6 +114,7 @@ func NewModbusSunspecFromConfig(ctx context.Context, other map[string]any) (Plug
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conn: conn,
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device: device,
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scale: cc.Scale,
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mask: mask,
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}
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for _, op := range ops {
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@ -116,12 +127,15 @@ func NewModbusSunspecFromConfig(ctx context.Context, other map[string]any) (Plug
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return nil, fmt.Errorf("sunspec model not found: %v", ops)
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}
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// recoverToError converts a panic into *err, for sunspec point access that panics on type mismatch.
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func recoverToError(err *error) {
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if r := recover(); r != nil {
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*err = fmt.Errorf("panic: %v", r)
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}
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}
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func (m *ModbusSunspec) floatGetter() (f float64, err error) {
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defer func() {
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if r := recover(); r != nil {
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err = fmt.Errorf("panic: %v", r)
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}
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}()
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defer recoverToError(&err)
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res, err := m.device.QueryPoint(
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m.conn,
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@ -157,12 +171,65 @@ func (m *ModbusSunspec) IntGetter() (func() (int64, error), error) {
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}, err
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}
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func (m *ModbusSunspec) blockPoint() (block sunspec.Block, point sunspec.Point, err error) {
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defer func() {
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if r := recover(); r != nil {
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err = fmt.Errorf("panic: %v", r)
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var _ BoolGetter = (*ModbusSunspec)(nil)
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// BoolGetter treats any non-zero raw value as true, ANDing an optional bitmask in first.
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// Reads the point directly since FloatGetter's ScaledValue panics on enum/bitfield points.
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func (m *ModbusSunspec) BoolGetter() (func() (bool, error), error) {
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return func() (res bool, err error) {
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defer recoverToError(&err)
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_, point, err := m.blockPoint()
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if err != nil {
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return false, err
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}
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}()
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val, err := pointInt64(point)
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if err != nil {
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return false, fmt.Errorf("model %d block %d point %s: %w", m.op.Model, m.op.Block, m.op.Point, err)
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}
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return sunspecBool(val, m.mask), nil
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}, nil
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}
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// pointInt64 reads a sunspec point's raw (unscaled) value as int64.
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func pointInt64(point sunspec.Point) (int64, error) {
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switch point.Type() {
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case typelabel.Bitfield16:
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return int64(point.Bitfield16()), nil
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case typelabel.Bitfield32:
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return int64(point.Bitfield32()), nil
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case typelabel.Enum16:
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return int64(point.Enum16()), nil
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case typelabel.Enum32:
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return int64(point.Enum32()), nil
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case typelabel.Int16:
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return int64(point.Int16()), nil
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case typelabel.Int32:
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return int64(point.Int32()), nil
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case typelabel.Int64:
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return point.Int64(), nil
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case typelabel.Uint16:
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return int64(point.Uint16()), nil
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case typelabel.Uint32:
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return int64(point.Uint32()), nil
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case typelabel.Uint64:
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return int64(point.Uint64()), nil
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default:
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return 0, fmt.Errorf("unsupported type: %s", point.Type())
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}
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}
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func sunspecBool(val int64, mask uint64) bool {
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if mask != 0 {
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return uint64(val)&mask != 0
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}
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return val != 0
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}
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func (m *ModbusSunspec) blockPoint() (block sunspec.Block, point sunspec.Point, err error) {
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defer recoverToError(&err)
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block, point, err = m.device.QueryPointAny(
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m.conn,
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@ -189,11 +256,7 @@ func (m *ModbusSunspec) FloatSetter(_ string) (func(float64) error, error) {
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typ := point.Type()
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return func(val float64) (err error) {
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defer func() {
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if r := recover(); r != nil {
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err = fmt.Errorf("panic: %v", r)
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}
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}()
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defer recoverToError(&err)
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val = val * m.scale
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switch typ {
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@ -219,11 +282,7 @@ func (m *ModbusSunspec) IntSetter(_ string) (func(int64) error, error) {
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typ := point.Type()
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return func(val int64) (err error) {
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defer func() {
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if r := recover(); r != nil {
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err = fmt.Errorf("panic: %v", r)
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}
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}()
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defer recoverToError(&err)
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val = int64(float64(val) * m.scale)
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113
plugin/sunspec_test.go
Normal file
113
plugin/sunspec_test.go
Normal file
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@ -0,0 +1,113 @@
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package plugin
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import (
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"testing"
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sunspec "github.com/andig/gosunspec"
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"github.com/andig/gosunspec/memory"
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"github.com/andig/gosunspec/models/model704"
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"github.com/evcc-io/evcc/util/modbus"
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"github.com/stretchr/testify/require"
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sunsdev "github.com/volkszaehler/mbmd/meters/sunspec"
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)
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func TestSunspecBool(t *testing.T) {
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cases := []struct {
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res int64
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mask uint64
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want bool
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}{
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{0, 0, false},
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{1, 0, true},
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{2, 0, true},
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{0b0100, 0b0010, false}, // masked-out bit
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{0b0110, 0b0010, true}, // masked-in bit
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}
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for _, c := range cases {
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if got := sunspecBool(c.res, c.mask); got != c.want {
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t.Errorf("sunspecBool(%v, %v) = %v, want %v", c.res, c.mask, got, c.want)
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}
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}
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}
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// newSunspecTestDevice builds an in-memory SunSpec model 704 (DER AC Controls)
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// device; mbmd never touches the modbus.Client argument, so no connection is needed.
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func newSunspecTestDevice(t *testing.T) (*sunsdev.SunSpec, sunspec.Block) {
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t.Helper()
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slab, err := memory.NewSlabBuilder().AddModel(model704.ModelID).Build()
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require.NoError(t, err)
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arr, err := memory.Open(slab)
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require.NoError(t, err)
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devices := arr.Collect(sunspec.AllDevices)
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require.NotEmpty(t, devices)
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block := devices[0].MustModel(sunspec.ModelId(model704.ModelID)).MustBlock(0)
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dev := sunsdev.NewDevice("test")
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require.NoError(t, dev.InitializeWithTree(devices))
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return dev, block
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}
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// TestSunspecBoolGetterEnum exercises BoolGetter against a real enum16 point
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// (WMaxLimPctEna, SunSpec 704), the curtailment-enabled flag.
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func TestSunspecBoolGetterEnum(t *testing.T) {
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dev, block := newSunspecTestDevice(t)
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for _, c := range []struct {
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val sunspec.Enum16
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mask uint64
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want bool
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}{
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{0, 0, false},
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{1, 0, true},
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{0b11, 0b10, true}, // masked-in bit
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{0b11, 0b100, false}, // masked-out bit
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} {
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block.MustPoint(model704.WMaxLimPctEna).SetEnum16(c.val)
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require.NoError(t, block.Write(model704.WMaxLimPctEna))
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mb := &ModbusSunspec{
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device: dev,
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op: modbus.SunSpecOperation{Model: model704.ModelID, Point: model704.WMaxLimPctEna},
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mask: c.mask,
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}
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g, err := mb.BoolGetter()
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require.NoError(t, err)
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got, err := g()
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require.NoError(t, err)
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require.Equal(t, c.want, got, "value %v mask %v", c.val, c.mask)
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}
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}
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// TestSunspecBoolGetterInt exercises BoolGetter against a real scaled int-like
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// point (WMaxLimPct, a uint16 with a SunSpec scale factor).
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func TestSunspecBoolGetterInt(t *testing.T) {
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dev, block := newSunspecTestDevice(t)
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mb := &ModbusSunspec{
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device: dev,
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op: modbus.SunSpecOperation{Model: model704.ModelID, Point: model704.WMaxLimPct},
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}
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g, err := mb.BoolGetter()
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require.NoError(t, err)
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block.MustPoint(model704.WMaxLimPct).SetUint16(0)
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require.NoError(t, block.Write(model704.WMaxLimPct))
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got, err := g()
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require.NoError(t, err)
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require.False(t, got)
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block.MustPoint(model704.WMaxLimPct).SetUint16(50)
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require.NoError(t, block.Write(model704.WMaxLimPct))
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got, err = g()
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require.NoError(t, err)
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require.True(t, got)
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}
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