diff --git a/ino/mcopy_cam_canon_ble_nano/mcopy_cam_canon_ble_nano.ino b/ino/mcopy_cam_canon_ble_nano/mcopy_cam_canon_ble_nano.ino
index 6b88f58..c4fa1da 100644
--- a/ino/mcopy_cam_canon_ble_nano/mcopy_cam_canon_ble_nano.ino
+++ b/ino/mcopy_cam_canon_ble_nano/mcopy_cam_canon_ble_nano.ino
@@ -34,7 +34,7 @@ volatile long blinkLast = 0;
 
 volatile long now;
 volatile long last = -1;
-volatile long cameraFrame = 2000;
+volatile long cameraFrame = 3000;
 
 volatile long start;
 volatile long end;
@@ -43,6 +43,8 @@ volatile char cmdChar = 'z';
 volatile char sChar = 'z';
 
 volatile bool connectedOnce = false;
+volatile String exposureString;
+volatile long exposureTarget = 3000;
 
 
 void setup () {
@@ -102,12 +104,25 @@ void cmd (char val) {
         camera_direction(true);
     } else if (val == mc.CAMERA_BACKWARD) {
         camera_direction(false);
+    } else if (val == mc.CAMERA_EXPOSURE) {
+        exposure();
     } else if (val == mc.STATE) {
         state();
     }
     cmdChar = 'z';
 }
 
+void exposure () {
+    exposureString = mc.getString();
+    parseExposureString();
+    cameraFrame = exposureTarget;
+    mc.confirm(mc.CAMERA_EXPOSURE);
+}
+
+void parseExposureString () {
+    exposureTarget = exposureString.toInt();
+}
+
 void s_cmd (char val) {
     if (val == 'C') {
         connected = true;
diff --git a/ino/mcopy_cam_relay/mcopy_cam_relay.ino b/ino/mcopy_cam_relay/mcopy_cam_relay.ino
index d717391..7f9cb47 100644
--- a/ino/mcopy_cam_relay/mcopy_cam_relay.ino
+++ b/ino/mcopy_cam_relay/mcopy_cam_relay.ino
@@ -32,6 +32,9 @@ volatile int cameraFrame = 2000;
 volatile char cmdChar = 'z';
 volatile long now;
 
+volatile String exposureString;
+volatile long exposureTarget = 2000;
+
 McopySerial mc;
 
 void setup () {
@@ -68,11 +71,24 @@ void cmd (char val) {
     camera_direction(false);
   } else if (val == mc.CAMERA) {
     camera();
+  } else if (val == mc.CAMERA_EXPOSURE) {
+    exposure();
   } else if (val == mc.STATE) {
     state();
   }
 }
 
+void exposure () {
+    exposureString = mc.getString();
+    parseExposureString();
+    cameraFrame = exposureTarget;
+    mc.confirm(mc.CAMERA_EXPOSURE);
+}
+
+void parseExposureString () {
+    exposureTarget = exposureString.toInt();
+}
+
 //null route direction
 void camera_direction (boolean state) {
   if (state) {