     {
       minute_ten_tick = false;
       new_errors = false;
-      Serial.printf("\r\net:%u  Good:%u  %u/sec", total_elapsed_seconds, PCA9548A_70.error.successful_count, PCA9548A_70.error.successful_count/(total_elapsed_seconds-startuptime));
+      Serial.printf("\r\net:%u  Good:%llu  %llu/sec", total_elapsed_seconds, PCA9548A_70.error.successful_count, PCA9548A_70.error.successful_count/(uint64_t)(total_elapsed_seconds-startuptime));
       if (PCA9548A_70.error.total_error_count) 
         {
-          Serial.printf("  bad:%u", PCA9548A_70.error.total_error_count);
+          Serial.printf("  bad:%llu", PCA9548A_70.error.total_error_count);
 #if defined I2C_AUTO_RETRY
     Serial.printf("  resetBus: %u", Wire.resetBusCountRead());
 #endif

  Serial.printf("Using i2c_t3 I2C library for Teensy\r\n");
#endif

  if (0xFFFFFFFFFFFFFFFE < UINT64_MAX) Serial.println ("Test of UINT64_MAX seems to pass");
  
  // start PCA9548A library

uint8_t inbyte = 0;

uint32_t old_total_error_count = 0;



/* ========== SETUP ========== */
void setup(void) 
