Hold outbound queue until device ready.

src/lib/device.ts

@@ -343,7 +343,7 @@ export default abstract class Device extends js.global.EventEmitter {
 
 	// Hot eats, cool treats
 	private dequeue(): void {
-		if (!this.ready) {
+		if (!this.ready && this.lastWrite > -Infinity) {
 			this.on('ready', this.dequeue.bind(this));
 			return;
 		}