Also propably needs a MAX2323 to work.

STM32_CONTROL/src/test.cpp

@@ -0,0 +1,22 @@
+#include <Arduino.h>
+
+
+// UART2 (PA3 = RX, PA2 = TX)
+HardwareSerial mdSerial(PA10, PA9);
+// HardwareSerial sigma(PA9, )
+
+
+
+void setup() {
+
+  mdSerial.begin(38400);
+
+
+
+}
+
+void loop() {
+  mdSerial.write("skibidi");
+
+  delay(5000); // wait before next loop
+}