Feature: Now you can enable/disable the lib in software

src/ft857d.cpp

@@ -131,6 +131,9 @@ void ft857d::addCATMSet(void (*userFunc)(byte)) {
 
  // check function
 void ft857d::check() {
+    // do nothing if it was disabled by software
+    if (!enabled) return;
+
     // first check if we have at least 5 bytes waiting on the buffer
     byte i = Serial.available();
     if (i < 5) return;

src/ft857d.h

@@ -115,6 +115,7 @@ class ft857d {
     void addCATGetMode(byte (*)(void));
     void addCATSMeter(byte (*)(void));
     void addCATTXStatus(byte (*)(void));
+    boolean enabled     = true;
 
  private:
     byte nullPad[5]     = {0,0,0,0,0};