Description M5Stack Station-485 is an industrial-grade ESP32 industrial IoT controller for RS485 field control, smart building automation, and multi-channel sensor expansion. The M5-K123 kit combines an ESP32-D0WDQ6-V3 dual-core processor, 16MB Flash, 2.4GHz Wi-Fi, a 1.14-inch IPS display, three programmable buttons, seven RGB LEDs, six Grove ports, and a PWR485 interface in one compact enclosure. As a Station-485 RS485 controller, the M5Stack Station-485 supports USB Type-C power, 9~24V power input through PWR485, and a reserved internal battery interface. It is designed for RS485 industrial communication, distributed data nodes, cabinet-mounted automation, and fast ESP32 prototyping where a screen, RS485 wiring, Grove expansion, and monitored power outputs are needed together. The M5Stack Station-485 is useful when an ESP32 industrial IoT controller must work as a smart building controller, a Modbus-style field node, or a multi-channel data acquisition device. With DIN rail, magnetic, wall-mounted, screw, and cable-tie installation options, this Station-485 RS485 controller fits both prototype benches and real equipment cabinets. Features ESP32 industrial IoT controller: ESP32-D0WDQ6-V3 dual-core processor, 240MHz main frequency, 600 DMIPS, 520KB SRAM, 16MB Flash, and 2.4GHz Wi-Fi. RS485 industrial communication: PWR485 combines RS485 wiring with 9~24V power input, making the M5Stack Station-485 suitable for field-side control and smart building controller projects. Local HMI: 1.14-inch IPS display, three programmable physical buttons, one power button, and seven programmable SK6812 RGB LEDs for local feedback. Multi-channel data acquisition: six Grove ports support I2C, I/O, and UART expansion, while INA3221 and INA199 monitor voltage and current for connected outputs. Industrial power design: SY8303 9~24V to 5V step-down circuit, AXP192 power management, SCT12A0DHKR boost converter, and SGM2553D power distribution switch. Flexible installation: DIN rail, magnet, wall mount, screw, and cable-tie mounting help the Station-485 RS485 controller fit control panels, building nodes, and test rigs. Developer friendly: supports UiFlow1, UiFlow2, Arduino IDE, ESP-IDF, PlatformIO, and FreeRTOS workflows for ESP32 industrial IoT controller development. Specifications SKU M5-K123 Product M5Stack Station-485 SoC ESP32-D0WDQ6-V3 dual-core processor, 240MHz DMIPS 600 SRAM 520KB Flash 16MB Wireless 2.4GHz Wi-Fi Display 1.14-inch IPS LCD, 240 x 135, ST7789V2 Buttons Power button, programmable physical buttons x 3 LED SK6812 RGB LED x 7 USB Power 5V@1A RS485 Power 9~24V@1A through PWR485 Host Interfaces USB Type-C x 1, HY2.0-4P Grove x 6, full-size USB Type-A output, PWR485 RTC BM8563 PMU AXP192 Voltage and Current Monitor INA3221 + INA199 USB Chip CH9102F TTL-RS485 SP3485 Step-Down Chip SY8303 DC/DC Boost SCT12A0DHKR Power Distribution Switch SGM2553D Antenna 2.4G 3D antenna Operating Temperature 0~60°C Reserved Internal Interfaces Battery interface 1.25mm-4P, USB line interface 1.25mm-4P Housing Material ABS + PC Product Size 88.0 x 65.0 x 35.0mm Product Weight 63.6g Package Size 104.0 x 73.0 x 54.5mm Gross Weight 105.3g Applications Smart building controller nodes for HVAC, lighting, energy monitoring, access equipment, and distributed sensor networks. RS485 industrial communication projects that need an ESP32-based controller with local HMI and field power input. Multi-channel data acquisition systems using Grove I2C, UART, GPIO, monitored power, and USB-A power output. Factory equipment monitoring, production-line data logging, cabinet-mounted field nodes, and Modbus-style gateway prototypes. Rapid IoT product prototyping where the M5Stack Station-485 replaces separate ESP32, display, RS485, power, and mounting modules. Product List 1 M5Stack Station-485 1 USB Type-C cable, 100cm 1 Hex key 1 I/O sticker Other Content The M5Stack Station-485 exposes PORT.A1, PORT.A2, PORT.B1, PORT.B2, PORT.C1, and PORT.C2 Grove connections. PORT.A1 and PORT.A2 share the same power and signal pins, while PORT.B1, PORT.B2, PORT.C1, and PORT.C2 use separate power and signal pins. This layout helps a Station-485 RS485 controller combine multi-channel data acquisition with stable RS485 wiring. For deployment, the M5Stack Station-485 can be mounted by DIN rail, magnet, wall mount, screws, or cable tie. This makes the ESP32 industrial IoT controller practical for smart building controller panels, small machine cabinets, laboratory test benches, and maintenance-ready retrofit projects. When planning software, treat the M5-K123 as a field-ready ESP32 industrial IoT controller: use the display and RGB LEDs for local status, use PWR485 for RS485 industrial communication, and use the six Grove ports for sensors or auxiliary modules. Resources M5Stack Station-485 Documentation Station-485 Schematics PDF Station-485 Structure Files M5Stack M5Station Arduino Library ESP32 Datasheet ST7789V2 Datasheet SP3485 RS485 Datasheet AXP192 Datasheet FAQ What is M5Stack Station-485 mainly used for? M5Stack Station-485 is mainly used as an ESP32 industrial IoT controller for RS485 industrial communication, smart building controller projects, multi-channel data acquisition, and industrial field control. Does M5-K123 support RS485 power input? Yes. The M5-K123 Station-485 RS485 controller includes a PWR485 interface with RS485 and 9~24V power input, which is useful for field wiring and cabinet-mounted automation. Can Station-485 be programmed with Arduino? Yes. The M5Stack Station-485 supports Arduino IDE, UiFlow1, UiFlow2, ESP-IDF, PlatformIO, and FreeRTOS, so developers can build an ESP32 industrial IoT controller with graphical or code-based workflows. Why choose Station-485 instead of a basic ESP32 board? Choose the M5Stack Station-485 when the project needs an ESP32 controller with RS485, display, buttons, RGB status LEDs, Grove expansion, monitored power outputs, and enclosure-ready mounting. A basic ESP32 board usually needs separate modules to match this Station-485 RS485 controller. Is it suitable for smart building automation? Yes. The M5Stack Station-485 is a good smart building controller for field nodes that need RS485 industrial communication, sensor collection, local status display, and stable 9~24V input.
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