Fix "no batt" case, when one of the batteries have dodgy driver

Makefile

@@ -13,6 +13,7 @@ build:
 	go build ${BUILDOPTS} -o ${BINARY} ./cmd/${BINARY}
 
 battery-test:
+	rm -rf ${TEST1}
 	go build ${BUILDOPTS} -o ${TEST1} ./cmd/${TEST1}
 
 ## Remove binary with golang compiler' means

cmd/battery-test/main.go

@@ -11,13 +11,12 @@ import (
 // Program entry point.
 func main() {
 	for {
-		batteries, err := battery.GetAll()
+		batteries, _ := battery.GetAll()
 
-		if err != nil {
-			fmt.Printf("Unable to get battery info: %w", err)
+		for index, battery := range batteries {
+			fmt.Printf("Battery %s: %s\n", index, spew.Sdump(battery))
 		}
 
-		spew.Dump(batteries)
 		time.Sleep(1 * time.Second)
 	}
 }

internal/lib/batteries.go

@@ -14,152 +14,156 @@ func (c *MyConfig) UpdateBatteryInfo() {
 		ch     int
 		status string
 		Batts  string
+		InitialDelay time.Duration = 100 * time.Millisecond
+		LoopIterationDelay time.Duration = 5 * time.Second
 	)
 
-	for {
-		batteries, err := battery.GetAll()
+	Delay := InitialDelay
+	ticker := time.NewTicker(Delay)
 
-		if err != nil {
-			Batts = fmt.Sprintf(
-				"<span font='%s' size='%s'>%s</span><span font='%s' size='%s'> no batt</span>",
+	for range ticker.C {
+		if Delay == InitialDelay {
+			Delay = LoopIterationDelay
+			ticker.Reset(Delay)
+		}
+
+		batteries, _ := battery.GetAll()
+		// In theory, this module should give for each entry its separate err, but in practice it gives
+		// one single err for all entries, so we cannot detemine whist exatly entry errored.
+ 
+		var (
+			battsInfo string
+			chStr     string
+		)
+
+		for i, b := range batteries {
+			switch b.State.Raw {
+			case battery.Charging:
+				status = `▲`
+			case battery.Discharging:
+				status = `▼`
+			case battery.Empty:
+				status = `✘`
+			default:
+				status = `•`
+			}
+
+			// N.B. there can be case when battery is overcharged and shows >100%. It also can indicate that
+			//      calibration data is out of date and battery should be re-calibrated.
+			ch = int(math.Round((b.Full - (b.Full - b.Current)) * (100 / b.Full)))
+
+			switch {
+			case ch <= 500 && ch >= 84:
+				if c.Battery.ChargeColor.Full == "" {
+					chStr = fmt.Sprintf(
+						"<span color='%s' background='%s' font='%s' size='%s'>% 3d%%</span>",
+						c.Battery.Color,
+						c.Battery.Background,
+						c.Battery.Font,
+						c.Battery.FontSize,
+						ch,
+					)
+				} else {
+					chStr = fmt.Sprintf(
+						`<span color='%s' background='%s' font='%s' size='%s'>% 3d%%</span>`,
+						c.Battery.ChargeColor.Full,
+						c.Battery.Background,
+						c.Battery.Font,
+						c.Battery.FontSize,
+						ch,
+					)
+				}
+
+			case ch < 85 && ch > 40:
+				if c.Battery.ChargeColor.AlmostFull == "" {
+					chStr = fmt.Sprintf(
+						"<span color='%s' background='%s' font='%s' size='%s'>% 3d%%</span>",
+						c.Battery.Color,
+						c.Battery.Background,
+						c.Battery.Font,
+						c.Battery.FontSize,
+						ch,
+					)
+				} else {
+					chStr = fmt.Sprintf(
+						`<span color='%s' background='%s' font='%s' size='%s'>% 3d%%</span>`,
+						c.Battery.ChargeColor.AlmostFull,
+						c.Battery.Background,
+						c.Battery.Font,
+						c.Battery.FontSize,
+						ch,
+					)
+				}
+
+			case ch <= 40 && ch >= 10:
+				if c.Battery.ChargeColor.AlmostEmpty == "" {
+					chStr = fmt.Sprintf(
+						"<span color='%s' background='%s' font='%s' size='%s'>% 3d%%</span>",
+						c.Battery.Color,
+						c.Battery.Background,
+						c.Battery.Font,
+						c.Battery.FontSize,
+						ch,
+					)
+				} else {
+					chStr = fmt.Sprintf(
+						`<span color='%s' background='%s' font='%s' size='%s'>% 3d%%</span>`,
+						c.Battery.ChargeColor.AlmostEmpty,
+						c.Battery.Background,
+						c.Battery.Font,
+						c.Battery.FontSize,
+						ch,
+					)
+				}
+
+			case ch < 10 && ch >= 0:
+				if c.Battery.ChargeColor.Empty == "" {
+					chStr = fmt.Sprintf(
+						"<span color='%s' background='%s' font='%s' size='%s'>% 3d%%</span>",
+						c.Battery.Color,
+						c.Battery.Background,
+						c.Battery.Font,
+						c.Battery.FontSize,
+						ch,
+					)
+				} else {
+					chStr = fmt.Sprintf(
+						`<span color='%s' background='%s' font='%s' size='%s'>% 3d%%</span>`,
+						c.Battery.ChargeColor.Empty,
+						c.Battery.Background,
+						c.Battery.Font,
+						c.Battery.FontSize,
+						ch,
+					)
+				}
+
+			default:
+				continue
+			}
+
+			battsInfo += fmt.Sprintf(
+				"<span color='%s' background='%s' font='%s' size='%s'>%s</span><span color='%s' background='%s' font='%s' size='%s'>B%d </span>%s<span color='%s' background='%s' font='%s' size='%s'> %s</span>",
+				c.Battery.Color,
+				c.Battery.Background,
 				c.Battery.SymbolFont,
 				c.Battery.SymbolFontSize,
 				c.Battery.Symbol,
+				c.Battery.Color,
+				c.Battery.Background,
 				c.Battery.Font,
 				c.Battery.FontSize,
+				i,
+				chStr,
+				c.Battery.Color,
+				c.Battery.Background,
+				c.Battery.Font,
+				c.Battery.FontSize,
+				status,
 			)
-		} else {
-			var (
-				battsInfo string
-				chStr     string
-			)
+		}
 
-			for i, b := range batteries {
-				switch b.State.Raw {
-				case battery.Charging:
-					status = `▲`
-				case battery.Discharging:
-					status = `▼`
-				case battery.Empty:
-					status = `✘`
-				default:
-					status = `•`
-				}
-
-				// N.B. there can be case when battery is overcharged and shows >100%. It also can indicate that
-				//      calibration data is out of date and battery should be re-calibrated.
-				ch = int(math.Round((b.Full - (b.Full - b.Current)) * (100 / b.Full)))
-
-				switch {
-				case ch > 85:
-					if c.Battery.ChargeColor.Full == "" {
-						chStr = fmt.Sprintf(
-							"<span color='%s' background='%s' font='%s' size='%s'>% 3d%%</span>",
-							c.Battery.Color,
-							c.Battery.Background,
-							c.Battery.Font,
-							c.Battery.FontSize,
-							ch,
-						)
-					} else {
-						chStr = fmt.Sprintf(
-							`<span color='%s' background='%s' font='%s' size='%s'>% 3d%%</span>`,
-							c.Battery.ChargeColor.Full,
-							c.Battery.Background,
-							c.Battery.Font,
-							c.Battery.FontSize,
-							ch,
-						)
-					}
-
-				case ch < 85 && ch > 40:
-					if c.Battery.ChargeColor.AlmostFull == "" {
-						chStr = fmt.Sprintf(
-							"<span color='%s' background='%s' font='%s' size='%s'>% 3d%%</span>",
-							c.Battery.Color,
-							c.Battery.Background,
-							c.Battery.Font,
-							c.Battery.FontSize,
-							ch,
-						)
-					} else {
-						chStr = fmt.Sprintf(
-							`<span color='%s' background='%s' font='%s' size='%s'>% 3d%%</span>`,
-							c.Battery.ChargeColor.AlmostFull,
-							c.Battery.Background,
-							c.Battery.Font,
-							c.Battery.FontSize,
-							ch,
-						)
-					}
-
-				case ch <= 40 && ch >= 10:
-					if c.Battery.ChargeColor.AlmostEmpty == "" {
-						chStr = fmt.Sprintf(
-							"<span color='%s' background='%s' font='%s' size='%s'>% 3d%%</span>",
-							c.Battery.Color,
-							c.Battery.Background,
-							c.Battery.Font,
-							c.Battery.FontSize,
-							ch,
-						)
-					} else {
-						chStr = fmt.Sprintf(
-							`<span color='%s' background='%s' font='%s' size='%s'>% 3d%%</span>`,
-							c.Battery.ChargeColor.AlmostEmpty,
-							c.Battery.Background,
-							c.Battery.Font,
-							c.Battery.FontSize,
-							ch,
-						)
-					}
-
-				case ch < 10:
-					if c.Battery.ChargeColor.Empty == "" {
-						chStr = fmt.Sprintf(
-							"<span color='%s' background='%s' font='%s' size='%s'>% 3d%%</span>",
-							c.Battery.Color,
-							c.Battery.Background,
-							c.Battery.Font,
-							c.Battery.FontSize,
-							ch,
-						)
-					} else {
-						chStr = fmt.Sprintf(
-							`<span color='%s' background='%s' font='%s' size='%s'>% 3d%%</span>`,
-							c.Battery.ChargeColor.Empty,
-							c.Battery.Background,
-							c.Battery.Font,
-							c.Battery.FontSize,
-							ch,
-						)
-					}
-				}
-
-				battsInfo += fmt.Sprintf(
-					"<span color='%s' background='%s' font='%s' size='%s'>%s</span><span color='%s' background='%s' font='%s' size='%s'>B%d </span>%s<span color='%s' background='%s' font='%s' size='%s'> %s</span>",
-					c.Battery.Color,
-					c.Battery.Background,
-					c.Battery.SymbolFont,
-					c.Battery.SymbolFontSize,
-					c.Battery.Symbol,
-					c.Battery.Color,
-					c.Battery.Background,
-					c.Battery.Font,
-					c.Battery.FontSize,
-					i,
-					chStr,
-					c.Battery.Color,
-					c.Battery.Background,
-					c.Battery.Font,
-					c.Battery.FontSize,
-					status,
-				)
-			}
-
-			if battsInfo != "" {
-				Batts = battsInfo
-			}
+		if battsInfo != "" {
+			Batts = battsInfo
 		}
 
 		if c.Values.BatteryString != Batts {