PY32F002A
from 安価なARMCortex-M0+マイコンPY32
PY32F002AF15P6TU
https://www.lcsc.com/product-detail/Microcontroller-Units-MCUs-MPUs-SOCs_PUYA-PY32F002AF15P6TU_C5292059.html
LCSCで1つ$0.2くらい
ROM 20k
RAM 3k
GPIO 18
コスパがかなり良さそうに見えるinajob.icon
PY32