Generally, the logic level of the main control IC is 3.3V and 0V. If the peripheral IC needs to be controlled, some of them need to use low-power devices, that is, 3.3V powered devices. However, since...
I have always wanted to play around with IEEE-802.15.4 chips. I played around with Zigbee many years ago, but basically I just modified the official code to build a mesh network. I didn't continue to ...