With this test you can issue commands to the servo through the serial monitor. I want to use serial monitor to display information from the target chip, but the chip's only connection is through the Arduino.

The arduino and the serial line, connected to Rx/Tx on the arduino pro mini are receiving/sending only when they have the same baud rate. In setup(), look for Serial.begin(9600); which tells the Arduino to start communicating via text, at 9600 baud. The Arduino software includes a serial monitor which allows simple textual data to be sent to and from the Arduino board via a USB connection. ... received correctly as they should be. Hi - I think I have a similar problem (Arduino pro mini 5V - 16MHz, Arduino 16, via Freeuino 1.16 to borrow the USB serial) The program is transferred fine, but the Serial comms in execution are all mixed-up, changing the baud rate doesn't fix things. Download the interactive_servo test to your Arduino IDE, compile it, and download it into the Arduino Pro Mini. I connected minicom on Mac OSX and ran arduino, but the result is the same, so i can eliminate that is has something to do with the OS. Arduino Stack Exchange is a question and answer site for developers of open-source hardware and software that is compatible with Arduino. But the are sending/receiving garbage. even if i TAP the serial ports to another TTL to USB converter i get 255 on my arduino Serial monitor and the correct data on the sniffer. Cheers, Dave Note that on the Micro, the Serial class refers to USB (CDC) communication; for TTL serial on pins 0 and 1, use the Serial1 class. The baud rate controls how much information is sent per second. Used to receive (RX) and transmit (TX) TTL serial data using the ATmega32U4 hardware serial capability. It's a good way to test the servo limits and the center point. According to the documentation for the official Arduino Pro Micro: Serial: 0 (RX) and 1 (TX). A SoftwareSerial library allows for serial communication on any of the Pro Mini's digital pins.