Program Arduino Pro Mini with CP2102 USB to TTL Coverter module

I like Arduino Pro Mini boards more than other Arduino boards. Mainly because of its minimalist design. But Arduino Pro Mini does not have built in USB interface to program it directly like we do in Arduino Uno. However we can program a Arduino Pro Mini easily using a cheap CP2102 USB to TTL converter module.

We just need to connect Arduino Pro Mini and CP2102 in following way:

Arduino Pro Mini 5V 16MHz → CP2102 USB to TTL converter module

  • DTR → DTR
  • TXD → RXD
  • RXD → TXD
  • VCC → +5V
  • GND → GND

Arduino Pro Mini 3.3V 8MHz → CP2102 USB to TTL converter module

  • DTR → DTR
  • TXD → RXD
  • RXD → TXD
  • GND → GND
  • VCC → 3V3

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