53 lines
1.2 KiB
Go
53 lines
1.2 KiB
Go
package core
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import (
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"fmt"
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"time"
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"github.com/cenkalti/backoff/v4"
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)
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var (
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status = map[bool]string{false: "disable", true: "enable"}
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presence = map[bool]string{false: "✗", true: "✓"}
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// Voltage global value
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Voltage float64
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)
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// bo returns an exponential backoff for reading meter power quickly
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func bo() *backoff.ExponentialBackOff {
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return backoff.NewExponentialBackOff(backoff.WithMaxElapsedTime(time.Second))
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}
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// powerToCurrent is a helper function to convert power to per-phase current
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func powerToCurrent(power float64, phases int) float64 {
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if Voltage == 0 {
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panic("Voltage is not set")
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}
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return power / (float64(phases) * Voltage)
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}
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// currentToPower is a helper function to convert current to sum power
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func currentToPower(current float64, phases int) float64 {
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if Voltage == 0 {
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panic("Voltage is not set")
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}
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return current * float64(phases) * Voltage
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}
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// printPtr returns a string representation of a pointer value
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func printPtr[T any](format string, v *T) string {
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if v == nil {
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return "<nil>"
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}
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return fmt.Sprintf(format, *v)
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}
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func ptrValueEqual[T comparable](a, b *T) bool {
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if (a == nil) != (b == nil) {
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return false
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}
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return a == nil && b == nil || (*a) == (*b)
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}
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