IoT Gateway Ethernet-RS485 based on STM32
This post is dedicated to DIY development of the Ethernet-RS485 gateway.
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Components
Hardware components
WIZnet - W5500
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Project description
This gateway is built on the basis of MK STM32F103CB (8)T6. As an Ethernet chip is a fairly well-known chip from WIZnet – W5500. The transport of this gateway in the Mysensors network is the wired interface of RS485. The RS485 was chosen as the max13488EESA’T,in part because of its automatic mode of choice of the direction of admission/transmission. So let’s go through the main parts of the gateway in more detail. The heart of the gateway is the MK STM32F103CBT6 in the 48L’FN case. MK is built on the Core Cortex-M3, has 128KB built-in flash memory and 20KB RAM. The MK’s regular frequency is…
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