// https://github.com/influxdata/telegraf/blob/master/plugins/inputs/modbus/modbus.go#L245
tags := map[string]string{
	"name":     m.Name,
	"type":     cCoils,
	"slave_id": strconv.Itoa(int(slaveID)),
}
m.collectFields(acc, timestamp, tags, requests.coil)

tags["type"] = cDiscreteInputs
m.collectFields(acc, timestamp, tags, requests.discrete)

tags["type"] = cHoldingRegisters
m.collectFields(acc, timestamp, tags, requests.holding)

tags["type"] = cInputRegisters
m.collectFields(acc, timestamp, tags, requests.input)

// https://github.com/influxdata/telegraf/blob/master/plugins/inputs/modbus/modbus.go#L520C1-L547C2
func (m *Modbus) collectFields(acc telegraf.Accumulator, timestamp time.Time, tags map[string]string, requests []request) {
	grouper := metric.NewSeriesGrouper()
	for _, request := range requests {
		for _, field := range request.fields {
			// Collect tags from global and per-request
			ftags := map[string]string{}
			for k, v := range tags {
				ftags[k] = v
			}
			for k, v := range field.tags {
				ftags[k] = v
			}
			// In case no measurement was specified we use "modbus" as default
			measurement := "modbus"
			if field.measurement != "" {
				measurement = field.measurement
			}

			// Group the data by series
			grouper.Add(measurement, ftags, timestamp, field.name, field.value)
		}
	}

	// Add the metrics grouped by series to the accumulator
	for _, x := range grouper.Metrics() {
		acc.AddMetric(x)
	}
}