When you do not own an expansion board, it is possible to connect to your device using a USB to Serial adapter. Make sure your USB to Serial converter is able to communicate at baudrates of 115200 and 921600. We do not recommend this setup for beginners.
To connect to your device using a USB to Serial adapter, connect the following pins:
Note: Please ensure the signal and voltage level of your UART adapter does not exceed 3.3V. When possible, change the settings on your adapter.
TXof your USB converter to the
RXof the device respectively.
GND. We recommend to connect a button for this.
By far the easiest way to access the USB UART REPL is via the our Pymakr plug-in for Atom and Visual Studio Code, though you might want to use one of the options listed below. Note that you can also use these methods when using one of the shields.
To open a serial USB connection from macOS, any serial tool may be used; in this example, the terminal tool
screen will be used. Open a terminal instance and run the following commands:
screen /dev/tty.usbmodem* 115200
minicommay be used instead of
screen. The usb serial address might also be listed as
/dev/ttyUSB01or a higher increment for
ttyUSB. Additionally, the elevated permissions to access the device (e.g. group uucp/dialout or use
sudo) may be required.
A terminal emulator is needed to open the connection from Windows. Te easiest option is to download the free program, PuTTY.
To use PuTTY the serial port (COM port) in which the Pycom device is connected, must be located. In Windows, this information can be found from the ‘Device Manager’ program.
With PuTTY open, click on
Session in the left-hand panel
Next click the
Serial radio button on the right and enter the associated
COM port (e.g.
COM4) in the
Serial Line box and
115200 for the Speed.
Finally, click the