Though [David] could have easily used USB OTG for this project, many microcontrollers don’t have the USB-to-TTL capabilities of his Arduino – so this wasn’t entirely in vain. At first ...

So let’s say your using an Arduino in your project. You already have the hardware-based serial interface working with one portion of the project and need a second serial port for unrelated hardware.

Arduino enthusiasts searching for an isolated USB to UART converter specifically designed for the Arduino Pro mini may be interested in a new piece of hardware created by Simone based in Italy.

The APC220 header feeds power to the module on pins 1 and 2 (GND and 5 V) and connects pins 4 and 5 (UART) to Arduino pins 0 and 1. The APC220 module (see next image) has a total of nine pins (only ...

In Arduino environment, it's convenient to access BT SPP like a serial port and react to the command string sent from the BT serial port. Many Arduino projects have utilized this way to allow ...