Arduino zero serial print not show


I bought The SAMD21 Mini is a Pro Mini-sized for the ATSAMD21G18 from bangood this is arduino zero clone platform and the form factor is really small and i think this is great replacement for arduino mini pro, this is the spec

  • ATSAMD21G18 32-bit/48MHz ARM Cortex-M0+
  • 256KB Flash Memory
  • 32KB SRAM32KB of EEPROM (emulated in Flash)
  • 22 GPIO Count 
  • 14 ADC Channels at 12-bit ResolutionAnalog-to-Digital and Digital-to-Analog Converters (ADC & DAC) 
  • RAW: 3.5V-6.0VVCC: 600mA  3.3V 
  • Pro Mini/Micro Layout
  • Integrated USB Controller

And today i connected this modul to Bosch sensor BME 680 modul using i2c connection, for the first time this board not print any Serial println, after browsing at internet i found the serial print must be activated by adding some command below

#define Serial SerialUSB

And this the complete code if you want to try it

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