This is my first project that involves the NRF52832 BLE MCU. The NRF52832 takes the analog signal from an ML8511 UV sensor and makes it available over a BLE service. Connections are pretty straightforward: the ML8511 output is connected to P0_28 of the NRF52832. An LED is connected to P0_25. That’s all there is to it apart from power (3.3V) and ground. The BLE value output is an integer value that represents UV intensity in mW/cm^2.

Code was developed using the mbed online compiler. This particular BLE board was bought from AliExpress for around €6. It is not available as a “platform” on mbed however the Delta DFBM-NQ620 seems to be compatible so I used that. Interesting to note that at this point in time the Serial interface class for the NRF52832 is in a known broken state.

Code is available over here on mbed.