   else                    Serial.println(F("Incorrect loop back of DOUT to AIN3 :("));
   Serial.println();
   
+  // JPP V1.02 (begin ...)
   // ---------------------------------------------------------------------------
   // Test of RS422 TX(H/L) and RS422 RX(H/L) signals
   // RS422 TX(H/L) is to be looped back to RS422 RX(H/L)

  Serial.println();
  if (rsOk) Serial.println(F("Test of loop back of RS TX to RX is:\tPASSED"));
  else      Serial.println(F("Incorrect loop back of RS TX to RX :("));
  
  Serial.println(F("\t\tThat's all folks !"));
}

// Version V1.01 (15/03/2017) : ACLK divider is a parameter, to cope with both units:
//   - 12MHz (prototypes) or
//   - 16MHz (serial production)
//
// Version V1.02 (18/01/2018) : added a test step for RS422 loopback check
//
// This program is distributed in the hope that it will be useful, but without any
// warranty; without even the implied warranty of merchantability or fitness for a
