Don't do this:

log.Println("[INFO] Reading version: ", string(buildBytes))
	} else {
		log.Println("[ERROR] Unable to read /opt/build_version.json file:", err)
Generates too much spam

go.mod

@@ -0,0 +1,3 @@
+module git.bellaerba.dev/henry/farm-messages
+
+go 1.23

messages.go

@@ -28,7 +28,6 @@ package messages
 
 import (
 	"encoding/json"
-	"log"
 	"math"
 	"math/rand"
 	"os"
@@ -237,39 +236,39 @@ const maxInt64 = float64(math.MaxInt64 - 512)
 func (t *ThrottleEntry) ForAttempt(attempt float64, minTime time.Duration, maxTime time.Duration) time.Duration {
 	// Zero-values are nonsensical, so we use
 	// them to apply defaults
-	min := t.Min
-	if min <= 0 {
-		min = minTime
+	minValue := t.Min
+	if minValue <= 0 {
+		minValue = minTime
 	}
-	max := t.Max
-	if max <= 0 {
-		max = maxTime
+	maxValue := t.Max
+	if maxValue <= 0 {
+		maxValue = maxTime
 	}
-	if min >= max {
+	if minValue >= maxValue {
 		// short-circuit
-		return max
+		return maxValue
 	}
 	factor := t.Factor
 	if factor <= 0 {
 		factor = 2
 	}
 	//calculate this duration
-	minFloat := float64(min)
+	minFloat := float64(minValue)
 	durationFloat := minFloat * math.Pow(factor, attempt)
 	if t.Jitter {
 		durationFloat = rand.Float64()*(durationFloat-minFloat) + minFloat
 	}
 	//ensure float64 won't overflow int64
 	if durationFloat > maxInt64 {
-		return max
+		return maxValue
 	}
 	dur := time.Duration(durationFloat)
 	//keep within bounds
-	if dur < min {
-		return min
+	if dur < minValue {
+		return minValue
 	}
-	if dur > max {
-		return max
+	if dur > maxValue {
+		return maxValue
 	}
 	return dur
 }
@@ -966,53 +965,38 @@ type StatusMessage struct {
 	States map[string]bool `json:"states,omitempty"`
 }
 
-type ManufacturerDataElement struct {
-	// The company ID, which must be one of the assigned company IDs.
-	// The full list is in here:
-	// https://www.bluetooth.com/specifications/assigned-numbers/
-	// The list can also be viewed here:
-	// https://bitbucket.org/bluetooth-SIG/public/src/main/assigned_numbers/company_identifiers/company_identifiers.yaml
-	// The value 0xffff can also be used for testing.
-	CompanyID uint16 `json:"company-id,omitempty"`
-
-	// The value, which can be any value but can't be very large.
+type BleServiceData struct {
+	UUID string `json:"uuid,omitempty"`
+	Name string `json:"name,omitempty"`
 	Data []byte `json:"data,omitempty"`
 }
 
-type BleAdvertisementPayload struct {
-	LocalName        string                    `json:"localName,omitempty"`
-	Bytes            []byte                    `json:"bytes,omitempty"`
-	ManufacturerData []ManufacturerDataElement `json:"manufacturerData,omitempty"`
+type BleManufacturerData struct {
+	CompanyId uint16 `json:"company_id,omitempty"`
+	Name      string `json:"name,omitempty"`
+	Data      []byte `json:"data,omitempty"`
 }
 
 type BleDevice struct {
-	Address       string                  `json:"address,omitempty"`
-	RSSI          int16                   `json:"rssi,omitempty"`
-	Name          string                  `json:"name,omitempty"`
-	Advertisement BleAdvertisementPayload `json:"advertisement,omitempty"`
+	Address          string                `json:"address,omitempty"`
+	RSSI             int16                 `json:"rssi,omitempty"`
+	Name             string                `json:"name,omitempty"`
+	ManufacturerData []BleManufacturerData `json:"companies,omitempty"`
 }
 
-type BleDevicesMap map[string]BleDevice
-
-type BleDevices []BleDevice
-
 type BleAdvertisementMessage struct {
-	Header  MessageHeader `json:"header,omitempty"`
-	Devices BleDevices    `json:"devices,omitempty"`
+	Header MessageHeader `json:"header,omitempty"`
+	Device BleDevice     `json:"device,omitempty"`
 }
 
 // noinspection GoUnusedExportedFunction
 func CreateHeader(status int, location string) MessageHeader {
-
 	// Do we have a build version?
 	//
 	var build BuildVersion
 	buildBytes, err := os.ReadFile("/opt/build_version.json")
 	if err == nil {
 		err = json.Unmarshal(buildBytes, &build)
-		log.Println("[INFO] Reading version: ", string(buildBytes))
-	} else {
-		log.Println("[ERROR] Unable to read /opt/build_version.json file:", err)
 	}
 
 	// Build Message Header