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M5Stack Station ESP32 IoT Development Kit (RS485 Version)

by M5Stack

M5Station-485 is a multi-purpose industrial level programmable embedded controller with Espressif ESP32 SOC, integrated Wi-Fi and 'BT' solution, dual core low-power Xtensa® 32-bit LX6 microprocessor, main frequency up to 240MHz.

Onboard 16M FLASH, integrated 240*135 1.14" full colour HD IPS display + physical keypad + rich peripherals, two sets of six expansion ports+ Low-power sleep/wakeup function. Multiple power supply options USB Type-C, PWR485, External Battery (battery socket reserved on board). The integrated high power density boost DC/DC converter SCT12A0DHKR on board ensures the stability of the electrical equipment even in complex applications. This device is suitable for industrial control, intelligent buildings, multi-channel data acquisition nodes and prototyping applications.

  • HMI:
    • 1.14" IPS display
    • 3 physical programmable keys
    • 1 ON/OFF button
    • 7 programmable RGB LEDs
  • Power supply:
    • Input:
      • Integrated 9~24V->5V DC/DC SY8303 Buck circuit
      • AXP192 power management chip
    • Output:
      • Each interface (6 Grove, 1 USB-A) is electronically switched on/off by SGM2553D.
      • INA3221 for voltage/current acquisition for Grove interfaces, and INA199 for current acquisition for the USB-A
      • Integrated high power density boost DC/DC converter SCT12A0DHKR
    • Low power consumption:
      • Integrated RTC BM8563 to achieve low power sleep/wakeup function
  • Port Design:
    • 6 way Grove expansion interface
      • Port A1/A2 shared the same power and signal pins
      • Port B1/B2/C1/C2 have separate power and signal pins
    • PWR485 interface (4-wire - VH3.96)
      • RS485
      • 9~24V power input
    • USB Tpye-A power supply output only, no signal pins
  • Mechnical Design:
    • Din rail
    • Magnet
    • Wall Mount
    • Screws
    • Ribbon
  • Programming development:
    • Supports UIFlow graphical programming platform, scripting, compile-free, cloud push
    • Fully compatible with Arduino, ESP32-IDF and other mainstream development platforms
    • Support FreeRTOS, with the help of dual-core and multitasking mechanism, efficient organization of task logic, optimize the execution efficiency of the program.

Power Management

Operation:

  • Power on: Click the central power button.
  • Power off: Press and hold the central power button for 4 seconds.

Include

  • 1x M5Station-485
  • 1x Type-C USB (100cm)
  • 1x HEX Key

Applications

  • Industrial Controller
  • Multi-channel data acquisition
  • IoT product prototyping
  • DIY/Prototyping

Specification

Spec Parameters
ESP32-D0WDQ6-V3 240MHz dual core, 600 DMIPS, 520KB SRAM, Wi-Fi
Flash 16MB
USB powered 5V@1A
RS485 power supply 9~24V@1A
Interface Type-C x1, GROVE(I2C+I/0+UART) x6, Full-Size USB Type-A(OUTPUT),PWR485
LEDs SK6812 x7
Pushbuttons Power Button, Physical Button \ 3
IPS LCD Screen 1.14"@240*135 ST7789V2
RTC BM8563
PMU AXP192
Voltage/Current Collector INA3221 + INA199
USB Chips CH9102F
Step-Down Chips SY8303
DC/DC Boost SCT12A0DHKR
Power Distribution Switch SGM2553D
Antenna 2.4G 3D Antenna
Operating Temperature 0°C to 60°C
Base Screw Specification Hexagon socket cup head M2*8 screw
Internal PCB reserved interface Battery interface(Specification:1.25mm-4P)USB line interface(Specification:1.25mm-4P)
Net Weight 63.1g
Gross Weight 108.1g
Product Dimensions 92 x 64.5 x 35 mm
Package Size 104.5 x 70.5 x 50mm
Case Material ABS+PC

Driver Installation

Click on below link to download the driver for your operating system. After extracting the zip package, select the installation package that corresponds to the operating system bit number to install. (CH9102_VCP_SER_MacOS v1.7 may report an error during the installation process, but the installation is actually complete, just ignore it.) If you are unable to download the program properly (timeout or Failed to write to target RAM), you can try to reinstall the driver.

Driver name Applicable driver chip Download link
CH9102_VCP_SER_Windows CH9102 Download
CH9102_VCP_SER_MacOS v1.7 CH9102 Download

PinMap

key BUTTON A & key BUTTON B & key BUTTON C & power button

ESP32 Chip GPIO37 GPIO38 GPIO39
Key Pins BUTTON A BUTTON B BUTTON C

Color TFT screen

Driver chip:ST7789v2 Resolution: 135x240 @1.14"

ESP32 Chip GPIO5 GPIO15 GPIO18 GPIO19 GPIO23
AXP192 Chip AXP_LDO3
LCD CS RESET SCK RS MOSI LCD_BL

RTC

ESP32 Chip GPIO21 GPIO22
BM8563 SDA SCL INT
AXP192 AXP_PWR

Current and Voltage Monitor

ESP32 Chip GPIO21 GPIO22 Control Channel
INA3221(0x40) SDA SCL AXP_GPIO0,AXP_GPIO1
INA3221(0x41) SDA SCL AXP_GPIO2,AXP_GPIO3,AXP_GPIO4

Internal I2C connection

ESP32 Chip GPIO21 GPIO22
AXP192 SDA SCL
BM8563 SDA SCL
INA3221 SDA SCL

PWR485

Chip GPIO3 GPIO1 GPIO2 (DCDC 9~24->5V) GND
SP3485 TXD RXD REn(READ Enable) GND
SY8303 VIN_12V

Power Management Chips (AXP192)

RTC LCD BackLight ESP32-3.3V SK6812,INA3221,CH902F
LDO1 LDO3 DC-DC1

USB to Serial Port

ESP32 Chip GPIO3 GPIO1
CH9102F TXD RXD

M5Station Port Description

PORT PIN Metering Port Notes:
PORT-A1(red) G32/33(SDA/SCL) AXP_GPIO0 I2C
PORT-A2(red) G32/33(SDA/SCL) AXP_GPIO0 I2C
PORT-B1(black) G25/35(OUT/IN) AXP_GPIO1 DAC/ADC
PORT-B2(black) G26/36(OUT/IN) AXP_GPIO2 DAC/ADC
PORT-C1(blue) G14/13(TX/RX) AXP_GPIO3 UART
PORT-C2(blue) G17/16(TX/RX) AXP_GPIO4 UART

Power Consumption Test

Operating current (LCD, LED, WIFI on) Standby current (LCD, LED on)
161mA 105mA

Related Link

Example