Navadeep
DIIDevHeads IoT Integration Server
•Created by accur4te on 3/28/2024 in #firmware-and-baremetal
Which family of chips i should look into for lightweight and custom application?
PoE should work as well. It might be easy to integrate while installation and is a fully wired method unlike other popular wireless IoT.
The software-stack and processing you need in PoE case might get complex and not all MCUs come with ethernet peripheral. For example, say RA6M2. It comes with ethernet MAC (exposing RGMII lines) and an external PHY chip say DP83867 will be required to further down connect with the RJ-45 port having twisted pair lines.
Also, the POE requires it's set of chips - usually a rectifier IC and PoE PD IC for handshaking to extract power from the twisted pair lines (ex: https://ww1.microchip.com/downloads/en/Appnotes/AN3533-PD70210AAL_and_PD70211_System_Layout_Guidelines.pdf)
System may look like:
[Sensors] --> SPI/I2C--> [MCU]-->RGMII-->[PHY]-->[RJ-45] <---- [PoE Connector]
|
Power <--[PoE PD]<-- [Rectifier]<--
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