Base64 encode SVG's too, to avoid things like '%' breaking.

README.md

@@ -1,2 +1,65 @@
+# Stream Deck plugin library for Go
+
 [![Go Reference](https://pkg.go.dev/badge/github.com/tardisx/streamdeck-plugin.svg)](https://pkg.go.dev/github.com/tardisx/streamdeck-plugin)
 
+You can find fully-formed examples using this library in
+[streamdeck-plugin-examples](https://github.com/tardisx/streamdeck-plugin-examples)
+
+## Basic usage
+
+```go
+package main
+
+import (
+	"fmt"
+	"log/slog"
+	"time"
+
+	"github.com/tardisx/streamdeck-plugin"
+	"github.com/tardisx/streamdeck-plugin/events"
+)
+
+// keep track of instances we've seen
+var contexts = map[string]bool{}
+
+func main() {
+	slog.Info("Starting up")
+	c := streamdeck.New()
+
+	slog.Info("Registering handlers")
+	c.RegisterHandler(func(e events.ERWillAppear) {
+		slog.Info(fmt.Sprintf("action %s appeared, context %s", e.Action, e.Context))
+		contexts[e.Context] = true
+	})
+	c.RegisterHandler(func(e events.ERWillDisappear) {
+		slog.Info(fmt.Sprintf("action %s disappeared, context %s", e.Action, e.Context))
+		delete(contexts, e.Context)
+	})
+	c.RegisterHandler(func(e events.ERKeyDown) {
+		slog.Info(fmt.Sprintf("action %s appeared, context %s", e.Action, e.Context))
+	})
+
+	slog.Info("Connecting web socket")
+	err := c.Connect()
+	if err != nil {
+		panic(err)
+	}
+
+	// update the title once a second, for all "seen" contexts
+	go func() {
+		for {
+			for context := range contexts {
+				c.Send(events.NewESSetTitle(
+					context,
+					time.Now().Format(time.Kitchen),
+					events.EventTargetBoth,
+					0))
+			}
+			time.Sleep(time.Second)
+		}
+	}()
+
+	slog.Info("waiting for the end")
+	c.WaitForPluginExit()
+}
+```

events/events_send.go

@@ -158,12 +158,12 @@ type ESSetImage struct {
 }
 
 type ESSetImagePayload struct {
-	Image  string      `json:"title"`
+	Image  string      `json:"image"`
 	Target EventTarget `json:"target"`
-	State  int         `json:"state"`
+	State  *int        `json:"state,omitempty"`
 }
 
-func NewESSetImage(context string, imageBase64 string, target EventTarget, state int) ESSetImage {
+func NewESSetImage(context string, imageBase64 string, target EventTarget, state *int) ESSetImage {
 	return ESSetImage{
 		ESCommon: ESCommon{
 			Event:   "setImage",

tools/tools.go

@@ -24,6 +24,6 @@ func ImageToPayload(i image.Image) string {
 
 // SVGToPayload create the string necessary to send an SVG
 // via a ESSetImage struct
-func SVGToPayload(context string, svg string) string {
+func SVGToPayload(svg string) string {
-	return "data:image/svg+xml;charset=utf8," + svg
+	return "data:image/svg+xml;charset=utf8;base64," + base64.StdEncoding.EncodeToString([]byte(svg))
 }