fix some warnings detected by pvs-studio

1 files changed, 2 insertions, 1 deletions

diff --git a/examples/device/board_test/src/main.c b/examples/device/board_test/src/main.c
index d91a8760e..872a97108 100644
--- a/examples/device/board_test/src/main.c
+++ b/examples/device/board_test/src/main.c
@@ -45,6 +45,7 @@ int main(void) {
 
   uint32_t start_ms = 0;
   bool led_state = false;
+  const size_t hello_len = strlen(HELLO_STR);
 
   while (1) {
     uint32_t interval_ms = board_button_read() ? BLINK_PRESSED : BLINK_UNPRESSED;
@@ -66,7 +67,7 @@ int main(void) {
         printf(HELLO_STR);
 
         #ifndef LOGGER_UART
-        board_uart_write(HELLO_STR, strlen(HELLO_STR));
+        board_uart_write(HELLO_STR, hello_len);
         #endif
       }