The purpose I created this board is for evaluating a new feature that will be added in our company products

#1 – The Design

The feature of the PCB still same as the previous version, only several items are fixed

• Power Protection : Resettable Fuse, UVP
• Controller : STM32F103RxTx
• Flash Memory : 1MByte for Device Configuration
• Storage : Micro-SD Card using SPI Interface for data log
• Onboard Sensor : Sensirion SHT31 Temperature & Humidity Sensor using I2C
• Communication : ISL8483 RS485 Transceiver
• Communication : CP2102N USB to UART Converter
• Communcation : UART-TTL for Nextion Display
• Relay/SSR Driver using BJT Transistor
• ESD Protection : IEC61000-4-2 Level 4 (15kV)