diff --git a/F1:F103/Canon_managing_device/canon.c b/F1:F103/Canon_managing_device/canon.c
index 612825e..08d75cb 100644
--- a/F1:F103/Canon_managing_device/canon.c
+++ b/F1:F103/Canon_managing_device/canon.c
@@ -172,6 +172,7 @@ void canon_init(){
  */
 void canon_proc(){
     static uint32_t Tconn = 0;
+    if(state == LENS_DISABLED) return;
     if(state == LENS_DISCONNECTED){
         if(!LENSCONNECTED()){
             Tconn = 0;
@@ -404,3 +405,25 @@ int canon_getinfo(){
 uint16_t canon_getstate(){
     return state | (inistate << 8);
 }
+
+void canon_disable(){
+    if(state == LENS_DISABLED) return;
+    state = LENS_DISABLED;
+    LENS_OFF();
+    ready = 0;
+}
+
+void canon_enable(){
+    if(state != LENS_DISABLED) return;
+    if(OVERCURRENT()){
+        state = LENS_OVERCURRENT;
+        return;
+    }
+    if(!LENSCONNECTED()){
+        state = LENS_DISCONNECTED;
+        return;
+    }
+    LENS_ON();
+    state = LENS_SLEEPING;
+    ready = 1;
+}
diff --git a/F1:F103/Canon_managing_device/canon.h b/F1:F103/Canon_managing_device/canon.h
index 49e17e6..6e77faf 100644
--- a/F1:F103/Canon_managing_device/canon.h
+++ b/F1:F103/Canon_managing_device/canon.h
@@ -92,6 +92,7 @@ typedef enum{
     LENS_INITIALIZED,   // initializing process
     LENS_READY,         // ready to operate
     LENS_ERR,           // some error occured - reconnect after REINIT_PAUSE
+    LENS_DISABLED,      // powered off by command
     LENS_S_AMOUNT
 } lens_state;
 
@@ -109,6 +110,8 @@ typedef enum{
 
 void canon_init();
 void canon_proc();
+void canon_disable();
+void canon_enable();
 int canon_diaphragm(char command);
 int canon_focus(int16_t val);
 int canon_sendcmd(uint8_t cmd);
diff --git a/F1:F103/Canon_managing_device/canonmanage.creator.user b/F1:F103/Canon_managing_device/canonmanage.creator.user
index d96c512..c13c0ee 100644
--- a/F1:F103/Canon_managing_device/canonmanage.creator.user
+++ b/F1:F103/Canon_managing_device/canonmanage.creator.user
@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <!DOCTYPE QtCreatorProject>
-<!-- Written by QtCreator 18.0.0, 2026-03-25T15:00:48. -->
+<!-- Written by QtCreator 18.0.0, 2026-04-14T09:27:26. -->
 <qtcreator>
  <data>
   <variable>EnvironmentId</variable>
diff --git a/F1:F103/Canon_managing_device/canonusb.bin b/F1:F103/Canon_managing_device/canonusb.bin
index ed12a97..d8ac4ec 100755
Binary files a/F1:F103/Canon_managing_device/canonusb.bin and b/F1:F103/Canon_managing_device/canonusb.bin differ
diff --git a/F1:F103/Canon_managing_device/main.c b/F1:F103/Canon_managing_device/main.c
index 7eb1469..b147e62 100644
--- a/F1:F103/Canon_managing_device/main.c
+++ b/F1:F103/Canon_managing_device/main.c
@@ -48,6 +48,7 @@ int main(void){
 
     uint32_t SPIctr = Tms;
     while(1){
+        // TODO: add CAN bus parsing
         IWDG->KR = IWDG_REFRESH;
         if(Tms - SPIctr > CANONPROC_INTERVAL){ // not more than once per 10ms
             SPIctr = Tms;
diff --git a/F1:F103/Canon_managing_device/proto.c b/F1:F103/Canon_managing_device/proto.c
index bf9b9b8..f088cbb 100644
--- a/F1:F103/Canon_managing_device/proto.c
+++ b/F1:F103/Canon_managing_device/proto.c
@@ -31,6 +31,8 @@ static const char *OK = "OK", *FAIL = "FAIL";
 
 const char* helpmsg =
     "https://github.com/eddyem/stm32samples/tree/master/F1-nolib/Canon_managing_device  build#" BUILD_NUMBER " @ " BUILD_DATE "\n"
+    "# - turn off lens power\n"
+    "* - turn on lens power\n"
     "0 - move to smallest foc value (e.g. 2.5m)\n"
     "1 - move to largest foc value (e.g. infinity)\n"
     "a - move focus to given ABSOLUTE position or get current value (without number)\n"
@@ -105,6 +107,7 @@ const char *connmsgs[LENS_S_AMOUNT+1] = {
     [LENS_INITIALIZED] = "initialized",
     [LENS_READY] = "ready",
     [LENS_ERR] = "error",
+    [LENS_DISABLED] = "turned off",
     [LENS_S_AMOUNT] = "wrong state"
 };
 const char *inimsgs[INI_S_AMOUNT+1] = {
@@ -128,6 +131,14 @@ void parse_cmd(const char *buf){
     lastFloodTime= FALSE;
     if(buf[1] == '\n' || !buf[1]){ // one symbol commands
         switch(*buf){
+            case '*':
+                canon_enable();
+                USB_sendstr(OK);
+            break;
+            case '#':
+                canon_disable();
+                USB_sendstr(OK);
+            break;
             case 'a':
             case 'f':
                 errw(canon_focus(-1));
diff --git a/F1:F103/Canon_managing_device/version.inc b/F1:F103/Canon_managing_device/version.inc
index 3d4e405..7c07671 100644
--- a/F1:F103/Canon_managing_device/version.inc
+++ b/F1:F103/Canon_managing_device/version.inc
@@ -1,2 +1,2 @@
-#define BUILD_NUMBER "114"
-#define BUILD_DATE "2025-03-12"
+#define BUILD_NUMBER "133"
+#define BUILD_DATE "2026-04-14"