diff --git a/src/sscma/grove_ai_we2/deviceHimax.ts b/src/sscma/grove_ai_we2/deviceHimax.ts
index 380b2cd..2d16095 100644
--- a/src/sscma/grove_ai_we2/deviceHimax.ts
+++ b/src/sscma/grove_ai_we2/deviceHimax.ts
@@ -260,6 +260,7 @@ class Himax extends Device {
 
   public async disconnect(): Promise<void> {
     console.log('Called when disconnected, Does serial exist?', !!this.serial);
+    this.break();
     this.cleanLogger();
     if (!this.serial) {
       return;
diff --git a/src/sscma/xiao_esp32s3/EspSerialDevice.ts b/src/sscma/xiao_esp32s3/EspSerialDevice.ts
index e3d07ac..55fd364 100644
--- a/src/sscma/xiao_esp32s3/EspSerialDevice.ts
+++ b/src/sscma/xiao_esp32s3/EspSerialDevice.ts
@@ -126,6 +126,7 @@ class EspSerialDevice extends Device {
   public async disconnect() {
     this.cleanLogger();
     try {
+      this.break();
       this.reader?.releaseLock();
       this.writer?.releaseLock();
       await this.port?.close();