Serial console

From Qi Hardware

At the back of the Ben NanoNote, there are GND, TXD, and RXD pins, which you can use for a serial console to the device.

To get output from those pins you need a TTL <-> RS232 converter (such as the FTDI TTL-232R-3V3 USB-to-TTL cable) as the Ben NanoNote serial console is TTL.

Pinout

Serial console connected to an FTDI TTL-232R-3V3 USB-to-TTL cable.

Serial console detached, the tiny wires easily fit under the battery so you can use the NanoNote as usual.

See also here. If you want to know that how to soldering these test points, you can also see here.

Connection

• Connect GND on the NanoNote to GND on your TTL-to-RS232 converter.
• Connect TXD on the NanoNote to RXD on your TTL-to-RS232 converter.
• Connect RXD on the NanoNote to TXD on your TTL-to-RS232 converter.

Software

• The default Baud rate is 57600, 8n1, no hardware or software flow control.
• You can use any terminal program on the PC side, such as minicom. You can use minicom with the following sample config file:

$ cat /etc/minicom/minirc.qi
pu port             /dev/ttyUSB0
pu baudrate         57600
pu rtscts           No
$ minicom -o qi