The CC2531 dongle is mostly compatible with CC2530. Therefore, you may use the corresponding firmware, but the USB interface will not work. You can only use it as a power source.
This dongle is a good start point for small DIY projects because it already contains two LEDs and two buttons. The IO connector allows you to connect one or two external sensors.
The basic configuration for this dongle is shown below. In this example, the S2 button controls the Red LED indicator (on/off). The S1 button controls P02 on the IO connector. The Green LED works as a status LED.
Of course, you may adjust other settings:
- Disable the status LED or change its mode.
- Change the default reporting interval on the “Expert” tab.
- Add an external sensor.