diff --git a/display/firmware/main.c b/display/firmware/main.c
index 9b7ef12..b35e891 100644
--- a/display/firmware/main.c
+++ b/display/firmware/main.c
@@ -170,9 +170,19 @@ static void loop() {
 	}
 }
 
+static void test() {
+	// clear
+	display_write(0x01, 0, 0);
+	// display on, no cursor
+	display_write(0x0c, 0, 0);
+	display_write(0x80, (const uint8_t *) "Hello, world", 12);
+	_delay_ms(1000);
+}
+
 int main() {
 	init();
 	while (1) {
-		loop();
+		//loop();
+		test();
 	}
 }