Making a rotary sensor an input device to computer

Mbed OS
5

Hello Daniel,

As Jan said the BLUEPILL used to be a very good deal. But because of the pandemic the prices changed a lot. I think the best deal (features/price) seems to be now the BLACKPILL board for about €3 (512kB flash, 96kB SRAM, 84MHz Core Clock) or €6 (512kB flash, 128KB, 100MHz Core Clock). At about the same price the BLACKPILL has additional advantages compared to the BLUEPILL:

              | BLUEPILL | BLACKPILL |
Flash size    |    128kB |     512kB |
SRAM          |     20kB |  96/128kB |
Core Clock    |    75MHz | 84/100MHz |
Cortex        |       M3 |        M4 |
USB on Mbed 6 |       no |       yes | 
Price/piece   |    €2.50 |     €3/€6 |

Please notice that the official mbed-enabled boards are equipped with an on-board programmer/debugger (probe). However, for the custom boards (like for example the BLUEPILL or BLACKPILL) you will need an external programmer (probe), for example as this one . Nevertheless, you can program the ARM Cortex M chips also using a built-in bootloader and a USB to UART TTL converter.

1 Like