Adds an error message to HardwareSerial::setPins() (#7040)

* Adds an error message to HardwareSerial::setPins() In order to avoid problems if the user tries to setPins() before initializing the Serial port with begin()
espressif · Jul 26, 2022 · c996036 · c996036
1 parent 03e2ad9
commit c996036
Showing 1 changed file with 4 additions and 0 deletions.
diff --git a/cores/esp32/HardwareSerial.cpp b/cores/esp32/HardwareSerial.cpp
@@ -491,6 +491,10 @@ void HardwareSerial::setRxInvert(bool invert)
 // negative Pin value will keep it unmodified
 void HardwareSerial::setPins(int8_t rxPin, int8_t txPin, int8_t ctsPin, int8_t rtsPin)
 {
+    if(_uart == NULL) {
+        log_e("setPins() shall be called after begin() - nothing done");
+        return;
+    }
     uartSetPins(_uart, rxPin, txPin, ctsPin, rtsPin);
 }