fix ESP32 crash when using SoftwareSerial as transmitter only (RxPin=…

…-1) (#235)
plerup · Apr 9, 2022 · d6af416 · d6af416
1 parent eb4b290
commit d6af416
Showing 1 changed file with 2 additions and 2 deletions.
diff --git a/src/SoftwareSerial.cpp b/src/SoftwareSerial.cpp
@@ -90,10 +90,10 @@ bool SoftwareSerial::isValidGPIOpin(int8_t pin) {
     // Pinout    https://docs.espressif.com/projects/esp-idf/en/latest/esp32c3/_images/esp32-c3-devkitm-1-v1-pinout.jpg
     return (pin >= 0 && pin <= 1) || (pin >= 3 && pin <= 7) || (pin >= 18 && pin <= 21);
 #else 
-    return true;
+    return pin >= 0;
 #endif
 #else
-    return true;
+    return pin >= 0;
 #endif
 }