diff --git a/pin_control/include/pin_control.h b/pin_control/include/pin_control.h
index cbfce67..13467e4 100644
--- a/pin_control/include/pin_control.h
+++ b/pin_control/include/pin_control.h
@@ -9,6 +9,8 @@ int turn_on_pin(int pin);
 
 int turn_off_pin(int pin);
 
+int probe_pin(int pin);
+
 int turn_on_all_pins();
 
 int turn_off_all_pins();
diff --git a/pin_control/src/pin_control.c b/pin_control/src/pin_control.c
index 80d1ebd..0ad62b0 100644
--- a/pin_control/src/pin_control.c
+++ b/pin_control/src/pin_control.c
@@ -73,6 +73,35 @@ int turn_off_pin(int pin) {
     return set_pin_state(pin, 0);
 }
 
+int probe_pin(int pin) {
+    int ret = -1;
+    if (!chip) {
+        perror("[pin_control] attempt to read GPIO line for invalid chip");
+        goto exit;
+    }
+
+    struct gpiod_line *line = gpiod_chip_get_line(chip, pin);
+    if (!line) {
+        perror("[pin_control] gpiod_chip_get_line()");
+        goto exit;
+    } else if (gpiod_line_request_input(line, "house-leds") < 0) {
+        perror("[pin_control] gpiod_line_request_input()");
+        goto exit_line;
+    }
+
+    ret = gpiod_line_get_value(line);
+    if (ret < 0) {
+        perror("[pin_control] gpiod_line_get_value()");
+        goto exit_line;
+    }
+
+exit_line:
+    // https://libgpiod-dlang.dpldocs.info/gpiod.gpiod_line_release.html
+    gpiod_line_release(line);
+exit:
+    return ret;
+}
+
 int turn_on_all_pins() {
     for (int pin = 0; pin <= 5; pin++)
         if (turn_on_pin(pin) < 0)