diff --git a/bricks/stm32/stm32.mk b/bricks/stm32/stm32.mk
index 8f7d93b87..f4f672ce1 100644
--- a/bricks/stm32/stm32.mk
+++ b/bricks/stm32/stm32.mk
@@ -452,6 +452,7 @@ PBIO_SRC_C = $(addprefix lib/pbio/,\
 	sys/bluetooth.c \
 	sys/command.c \
 	sys/hmi.c \
+	sys/io_ports.c \
 	sys/light_matrix.c \
 	sys/light.c \
 	sys/main.c \
diff --git a/lib/pbio/drv/ioport/ioport_lpf2.c b/lib/pbio/drv/ioport/ioport_lpf2.c
index b2030b280..e77a668aa 100644
--- a/lib/pbio/drv/ioport/ioport_lpf2.c
+++ b/lib/pbio/drv/ioport/ioport_lpf2.c
@@ -139,6 +139,10 @@ void pbdrv_ioport_lpf2_init(void) {
     process_start(&pbdrv_ioport_lpf2_process, NULL);
 }
 
+void pbdrv_ioport_lpf2_shutdown(void) {
+    process_exit(&pbdrv_ioport_lpf2_process);
+}
+
 static void ioport_enable_uart(ioport_dev_t *ioport) {
     const pbdrv_ioport_lpf2_port_platform_data_t *pdata = ioport->pdata;
 
diff --git a/lib/pbio/drv/ioport/ioport_lpf2.h b/lib/pbio/drv/ioport/ioport_lpf2.h
index a95f16d27..00a02b27c 100644
--- a/lib/pbio/drv/ioport/ioport_lpf2.h
+++ b/lib/pbio/drv/ioport/ioport_lpf2.h
@@ -43,8 +43,11 @@ typedef struct {
 extern const pbdrv_ioport_lpf2_platform_data_t pbdrv_ioport_lpf2_platform_data;
 
 void pbdrv_ioport_lpf2_init(void);
+void pbdrv_ioport_lpf2_shutdown(void);
+
 #else // PBDRV_CONFIG_IOPORT_LPF2
 #define pbdrv_ioport_lpf2_init()
+#define pbdrv_ioport_lpf2_shutdown()
 #endif // PBDRV_CONFIG_IOPORT_LPF2
 
 #endif // _INTERNAL_PBDRV_IOPORT_LPF2_H_
diff --git a/lib/pbio/platform/city_hub/sys.c b/lib/pbio/platform/city_hub/sys.c
index 36f23f143..fb9e631c9 100644
--- a/lib/pbio/platform/city_hub/sys.c
+++ b/lib/pbio/platform/city_hub/sys.c
@@ -11,6 +11,7 @@
 #include <pbsys/status.h>
 
 #include "../sys/hmi.h"
+#include "../sys/io_ports.h"
 #include "../sys/supervisor.h"
 #include "../sys/user_program.h"
 
@@ -33,6 +34,7 @@ PROCESS_THREAD(pbsys_process, ev, data) {
             etimer_reset(&timer);
             pbsys_battery_poll();
             pbsys_hmi_poll();
+            pbsys_io_ports_poll();
             pbsys_supervisor_poll();
             pbsys_user_program_poll();
         }
diff --git a/lib/pbio/platform/move_hub/sys.c b/lib/pbio/platform/move_hub/sys.c
index 36f23f143..fb9e631c9 100644
--- a/lib/pbio/platform/move_hub/sys.c
+++ b/lib/pbio/platform/move_hub/sys.c
@@ -11,6 +11,7 @@
 #include <pbsys/status.h>
 
 #include "../sys/hmi.h"
+#include "../sys/io_ports.h"
 #include "../sys/supervisor.h"
 #include "../sys/user_program.h"
 
@@ -33,6 +34,7 @@ PROCESS_THREAD(pbsys_process, ev, data) {
             etimer_reset(&timer);
             pbsys_battery_poll();
             pbsys_hmi_poll();
+            pbsys_io_ports_poll();
             pbsys_supervisor_poll();
             pbsys_user_program_poll();
         }
diff --git a/lib/pbio/platform/prime_hub/sys.c b/lib/pbio/platform/prime_hub/sys.c
index 36f23f143..fb9e631c9 100644
--- a/lib/pbio/platform/prime_hub/sys.c
+++ b/lib/pbio/platform/prime_hub/sys.c
@@ -11,6 +11,7 @@
 #include <pbsys/status.h>
 
 #include "../sys/hmi.h"
+#include "../sys/io_ports.h"
 #include "../sys/supervisor.h"
 #include "../sys/user_program.h"
 
@@ -33,6 +34,7 @@ PROCESS_THREAD(pbsys_process, ev, data) {
             etimer_reset(&timer);
             pbsys_battery_poll();
             pbsys_hmi_poll();
+            pbsys_io_ports_poll();
             pbsys_supervisor_poll();
             pbsys_user_program_poll();
         }
diff --git a/lib/pbio/platform/technic_hub/sys.c b/lib/pbio/platform/technic_hub/sys.c
index 8c0cba3e0..db7b926b5 100644
--- a/lib/pbio/platform/technic_hub/sys.c
+++ b/lib/pbio/platform/technic_hub/sys.c
@@ -11,6 +11,7 @@
 #include <pbsys/status.h>
 
 #include "../sys/hmi.h"
+#include "../sys/io_ports.h"
 #include "../sys/supervisor.h"
 #include "../sys/user_program.h"
 
@@ -34,6 +35,7 @@ PROCESS_THREAD(pbsys_process, ev, data) {
             etimer_reset(&timer);
             pbsys_battery_poll();
             pbsys_hmi_poll();
+            pbsys_io_ports_poll();
             pbsys_supervisor_poll();
             pbsys_user_program_poll();
         }
diff --git a/lib/pbio/sys/io_ports.c b/lib/pbio/sys/io_ports.c
new file mode 100644
index 000000000..b837713b8
--- /dev/null
+++ b/lib/pbio/sys/io_ports.c
@@ -0,0 +1,15 @@
+// SPDX-License-Identifier: MIT
+// Copyright (c) 2021 The Pybricks Authors
+
+// Manages I/O ports
+
+#include <pbsys/status.h>
+
+// TODO need to make this more generic - for now assuming LPF2 everywhere
+#include "../../drv/ioport/ioport_lpf2.h"
+
+void pbsys_io_ports_poll(void) {
+    if (pbsys_status_test(PBIO_PYBRICKS_STATUS_SHUTDOWN)) {
+        pbdrv_ioport_lpf2_shutdown();
+    }
+}
diff --git a/lib/pbio/sys/io_ports.h b/lib/pbio/sys/io_ports.h
new file mode 100644
index 000000000..9b2bcca25
--- /dev/null
+++ b/lib/pbio/sys/io_ports.h
@@ -0,0 +1,9 @@
+// SPDX-License-Identifier: MIT
+// Copyright (c) 2021 The Pybricks Authors
+
+#ifndef _PBSYS_SYS_IO_PORTS_H_
+#define _PBSYS_SYS_IO_PORTS_H_
+
+void pbsys_io_ports_poll(void);
+
+#endif // _PBSYS_SYS_IO_PORTS_H_