User Manual
Introduction
STM32 Open IoT and IIoT Gateways (P10 - P12)
Open IoT Gateway is also called as a PAC (Programmable Automation Controller). PAC products combine the functionality and openness of PC, the reliability of a programmable logic unit like PLC and the intelligence of I/O modules with flexible software tools for a wide range of applications from data acquisition, process control, motion control to energy and building management.
Our PAC family includes FreeRTOS PACs for different requirements in OS, CPU and development platforms.
The P10 - P12 gateways are based on STM32 ARM Cortex-M4.
If you want to get started, make sure you have complete set of:
- Tag-connect cable
- Tag-connect retaining clip board (optional)
- Open IoT and IIoT Gateway
- USB Programmer
- ST-LINK programmer
Hardware
STM32 Open IoT and IIoT Gateways (P10 - P12)
Features
|
Features |
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|---|---|
|
Open IoT gateway |
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ESD protection for the RS485 data line |
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Power supply: +12 to +30 VDC |
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Transmission speed up to 115200 bps |
|
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Tx, Rx and power LED indicators |
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RS485 embedded termination 120 ohm |
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Operating temperatures: -40°C to +75°C |
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DIN-rail mounting |
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Dimensions: 98x56.4x22.5 mm |
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3 years warranty |
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Customization of OEM is welcomed |
Frame ground FG
Electronic circuits are constantly prone to electrostatic discharge ESD. Redisage Electronics modules feature a design for the frame ground terminal block FG. The frame ground provides a path for bypassing ESD, which provides enhanced static protection ESD abilities and ensures the module is more reliable. Connecting FG terminal block to the earth ground will bypass the ESD disturbances outside the device so will provide a better level of protection against ESD.
Frame Ground FG connection reference drawing is provided below.
If earth ground is not available FG can be left floating or it can be connected with the power supply GND.
Specifications
|
Redisage PN |
P10 |
P11 |
P12 |
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|
Ports |
RS232 |
4x |
- |
2x |
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|
RS485 |
- |
4x |
2x |
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RS232/RS485 |
- |
- |
- |
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Microcontroller |
STM32 |
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WiFi |
N/A | ||||||
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Bluetooth |
N/A | ||||||
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SMA socket connector for WiFi/BT antenna |
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Tactile switch |
 |
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Power |
Voltage |
12-30 VDC |
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|
Power |
< 1 W |
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Frame ground protection |
yes |
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Baud rate |
up to 115200 bps |
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LED indicators |
power, link activity, programmable RGB |
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RS485 termination |
120 ohm manually enabled |
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Connector |
RS232/RS485 |
8-pin terminal block max. 2.5 mm2 wire |
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Power |
3-pin terminal block max. 2.5 mm2 wire |
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Ethernet |
RJ45 |
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Transmission |
RS485 |
max. 1,200 m at 9.6 kbps; max. 400 m at 115.2 kbps |
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RS232 |
max. 15 m at 115.2 kbps |
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Mounting and enclosure |
DIN rail, plastic PA - UL 94 V0, black/green |
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Temperatures |
-40°C to +75°C operating and storage |
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Humidity |
10 - 90% RH, non-condensing |
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ESD protection |
±4 kV contact discharge / ±8 kV air discharge |
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Certification |
CE, RoHS, EMC, LVD |
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Norms |
61000-6-2 - Immunity standard for industrial environments 61000-6-4 - Emission standard for industrial environments |
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LED indicators
| Gateways P10 - P12 |
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 |
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| LED indicator | Color | Function |
| PW | Blue | Power |
| L1 | Green | LED 1 |
| L2 | Green | LED 2 |
| L3 | Yellow | LED 3 |
| L4 | Red | LED 4 |
| L5 | Red | LED 5 |
Pin assignments
|
P10
|
P11
|
|
P12
|
|
Board overview
The complete Open IoT and IIoT Gateway kit consists of:
- developer module
- power supply module
- RJ45 network adapter
- hardware programmer (TagConnect + adapter for ST-LINK)
Main Board
Power Supply Board
Power input & RS232/RS485 ports
- Vcc1, Vcc2 - power supply input 12-30 VDC
- FG - frame ground
- GND - power supply ground
RS232/RS485 ports depend on the device variant.
Ethernet
To support the Ethernet network interface communication, the network adapter available in the kit must be installed on the module (pay attention to its correct installation). This interface is supported by the external IP101G physical layer which communicates with the STM32 microcontroller.
Programming
STM32 Open IoT and IIoT Gateways (P10 - P12)
Install IDE & Programmer
Download and install STM32CubeIDE for ability to creating own programs. For device programming, you must install STM32CubeProgrammer. Follow the instructions located on the producer's site. Software is available on Windows, Linux and macOS. Of course, there is a possibility of using other IDEs, but Cube is dedicated to STM32 MCUs and provides a lot of compatible libraries.
Connect the programmer
STM32 IoT and IIoT Gateways can be programmed only with the MCU producer's external hardware programmer - ST LINK - connected via the Tag-Connect connector to the board. After connecting it to the board and a PC, the device should be available in Device Manager as STM32 STLink in Universal Serial Bus devices.
Connect the power supply
The gateway works with 12-30V DC power supplies. Make sure your supply is properly set.
Create your own programs
After all of the above steps are done, the device should be ready to be programmed.
Build, flash and monitor the device
There are two options for building your program.
STM32CubeIDE
Right click on your project and choose Debug As -> STM32 C/C++ Application. It should generate the .elf file in the Debug folder in the project.
CMake
The project can also be built in STM32CubeIDE via CMake. For more information and instructions check the producer's instructions.
Flash
There are two ways to flash the device.
STM32CubeProgrammer
It is the most recommended to use Programmer.
Open the software and connect it to the ST-Link programmer.
After successful connect you should see the device memory with addresses on the screen.
Click on the down-arrow on the left side of the screen and browse for your file path.
Find the .elf file (it should always be generated in the Debug folder in your project's path).
Click "Open".
Click "Start Programming".
If programming have been done successfully, you should see on the screen some messages in pop-up windows and Log console.
The Gateway has been programmed.
Flashing in IDE
It is possible to flash your program directly from STM32CubeIDE. However, this method works only with some simple, small projects without using CMake. Just click on the 
icon in the IDE, and after a few seconds, the device should be programmed. If it doesn't work, use the previous method.
Monitoring
You can connect the device to your computer using a console and Serial connection. To do so, you need two USB cables and a USB -> UART Converter (for example, C37).
If the connection is correct, the device will be visible as a USB Serial Port (COMx/ttyUSB). You can use any console terminal with the Serial option. The baudrate depends on USB UART settings in the project.
Pin Map
STM32 Open IoT and IIoT Gateways (P10 - P12)
CGM Rev. 3.1
| Element | Connection |
| LED | |
| Power LED | +3V3 |
|
LED1 |
PG6 |
| LED2 | PH14 |
| LED3 | PA10 |
| LED4 | PH12 |
| LED5 | PI9 |
| ST3232BTR_1 UART RS232 Transceiver (P10 & P11) | |
| T1_IN | USART1_TXD |
| T2_IN | USART6_TXD |
| T1_OUT | TXD1 |
| T2_OUT | TXD2 |
| R1_IN | RXD1 |
| R2_IN | RXD2 |
| R1_OUT | USART1_RXD |
| R2_OUT | USART6_RXD |
| V+ |
C7 (100nF) |
| V- | C8 (100nF) |
| C1+ | C5 (100nF) |
| C1- | C5 (100nF) |
| C2+ | C6 (100nF) |
| C2- | C6 (100nF) |
| ESDA25-4BP6 ESD protection | |
| I/O_1 | RXD2 |
|
I/O_2 |
TXD1 |
| I/O_3 | RXD1 |
| I/O_4 | TXD2 |
| GND | FGC |
| ST3232BTR_2 UART RS232 Transceiver (P10) | |
| T1_IN | USART3_TXD |
| T2_IN | UART7_TXD |
| T1_OUT | B_4 |
| T2_OUT | B_3 |
| R1_IN | A_4 |
| R2_IN | A_3 |
| R1_OUT | USART3_RXD |
| R2_OUT | UART7_RXD |
| V+ |
C64 (100nF) |
| V- | C65 (100nF) |
| C1+ | C57 (100nF) |
| C1- | C57 (100nF) |
| C2+ | C50 (100nF) |
| C2- | C50 (100nF) |
| ESDA25-4BP6 ESD protection | |
| I/O_1 | - |
|
I/O_2 |
- |
| I/O_3 | B_4 |
| I/O_4 | A_4 |
| GND | FGC |
| MAX481CSA_1 UART RS485 Transceiver (P12) | |
| DI | USART1_TXD |
| DE | RS485_DRIVER_ENABLE1 |
| RE/ | RS485_RECEIVER_ENABLE1 |
| RO | USART1_RXD |
| A | TXD1 |
| B | RXD1 |
| MAX481CSA_2 UART RS485 Transceiver (P12) | |
| DI | USART6_TXD |
| DE | RS485_DRIVER_ENABLE2 |
| RE/ | RS485_RECEIVER_ENABLE2 |
| RO | USART6_RXD |
| A | TXD2 |
| B | RXD2 |
| MAX481CSA_3 UART RS485 Transceiver (P11 & P12) | |
| DI | USART3_TXD |
| DE | RS485_DRIVER_ENABLE3 |
| RE/ | RS485_RECEIVER_ENABLE3 |
| RO | USART3_RXD |
| A | A_3 |
| B | B_3 |
| MAX481CSA_4 UART RS485 Transceiver (P11 & P12) | |
| DI | UART7_TXD |
| DE | RS485_DRIVER_ENABLE4 |
| RE/ | RS485_RECEIVER_ENABLE4 |
| RO | UART7_RXD |
| A | A_4 |
| B | B_4 |
| USBLC6-2P6 ESD protection | |
| VCC | VBUS_ADC, MICROUSB_B_U254-051T-4BH83-F1S (PIN1) |
| GND | GND |
| IO1_A | MICROUSB_B_U254-051T-4BH83-F1S (PIN2) |
| IO2_A | MICROUSB_B_U254-051T-4BH83-F1S (PIN3) |
| IO1_B | BOOTLOADER_TX |
| IO2_B | BOOTLOADER_RX |
| Serial EEPROM M24C08-RMC6TG | |
| E0 |
GND |
| E1 |
GND |
| E2 |
+3V3 |
| VSS |
GND |
| VCC |
+3V3 |
| WC/ |
GND |
| SCL |
I2C1_SCL |
| SDA |
I2C1_SDA |
| Serial Flash A25LQ64M | |
| CS# | SPI2_SS |
| SO | SPI2_MISO |
| WP# | SPI2_W |
| VSS | GND |
| VCC | +3V3 |
| HOLD# | SPI2_IO3 |
| SCLK | SPI2_SCK |
| SI | SPI2_MOSI |
| IP101GRI ETHERNET PHY transceivers | |
| MDC |
ETH_MDC |
| MDIO |
ETH_MDIO |
| MDI_TP |
TXD+ |
| MDI_TN |
TXD- |
| MDI_RP |
RXD+ |
| MDI_RN |
RXD- |
| X2 | - |
| X1 | ETH_MCO |
| RESET_N | ETH_RESET_N |
| ISET | ETH_ISET |
| LED0/PHY_AD0 | ETH_LED0/PHY_AD0 |
| LED3/PHY_AD3 | ETH_LED3/PHY_AD3 |
| TEST_ON | - |
| REGOUT | C23 (100 nF), C29 (10 uF) |
| VDDIO | +3V3 |
| AVDD33 | +3V3 |
| GND | GND |
| TXEN | ETH_TX_EN |
| TXER/FXSD | - |
| TXCLK/50M_CLKI | ETH_RMII_REF_CLK |
| TXD0 | ETH_TXD0 |
| TXD1 | ETH_TXD1 |
| TXD2 | - |
| TXD3 | - |
| RXDV/CRS_DV/FX_HEN | ETH_RXDV/CRS_DV |
| RXCLK/50M_CLKO | - |
| RXD0 | ETH_RXD0 |
| RXD1 | ETH_RXD1 |
| RXD2 | - |
| RXD3 | - |
| RXER/INTR_32 | - |
| COL/RMII | ETH_COL/RMII |
| CRS/LEDMOD | - |
| STM32 F439NIH6 | |
| PA0 | - |
| PA1 | ETH_RMII_REF_CLK |
| PA2 | ETH_MDIO |
| PA3 | - |
| PA4 | - |
| PA5 | - |
| PA6 | SWITCH |
| PA7 | ETH_RXDV/CRS_DV |
| PA8 |
ETH_MCO |
| PA9 | BUZZER_PWM |
| PA10 | LED_A3 |
| PA11 | USB_DM BOOTLOADER_RX |
| PA12 | USB_DP BOOTLOADER_TX |
| PA13 | JTMS |
| PA14 | JTCK |
| PA15 | CONF2 |
| PB0 | ETH_LED0/PHY_AD0 |
| PB1 | ETH_LED3/PHY_AD3 |
| PB2 | BOOT1 |
| PB3 | SW0 |
| PB4 | USART1_RXD |
| PB5 | USART1_TXD |
| PB6 | USART1_TXD |
| PB7 | USART1_RXD |
| PB8 | I2C1_SCL |
| PB9 | I2C1_SDA |
| PB10 | USART3_TXD |
| PB11 | USART3_RXD |
| PB12 | USART3_RXD |
| PB13 | USART3_TXD |
| PB14 | - |
| PB15 | - |
| PC0 | SD_NWE |
| PC1 | ETH_MDC |
| PC2 | - |
| PC3 | - |
| PC4 |
ETH_RXD0 |
| PC5 | ETH_RXD1 |
| PC6 | USART6_TXD |
| PC7 | USART6_TXD |
| PC8 | CONF4 |
| PC9 | CONF1 |
| PC10 | BOOTLOADER_TX |
| PC11 | BOOTLOADER_RX |
| PC12 | CONF3 |
| PC13 | RTC_AF1 |
| PC14 | OSC32_IN |
| PC15 | OSC32_OUT |
| PD0 | D2 |
| PD1 | D3 |
| PD2 | CONF6 |
| PD3 | - |
| PD4 | NOR_NOE |
| PD5 | NOR_NWE |
| PD6 | NOR_NWAIT |
| PD7 | NOR_NE1 |
| PD8 | D13 |
| PD9 | D14 |
| PD10 | D15 |
| PD11 | A16 |
| PD12 | A17 |
| PD13 | A18 |
| PD14 | D0 |
| PD15 | D1 |
| PE0 | SD_LDOM |
| PE1 | SD_UDOM |
| PE2 | - |
| PE3 | A19 |
| PE4 | A20 |
| PE5 | A21 |
| PE6 | - |
| PE7 | D4 |
| PE8 | D5 |
| PE9 | D6 |
| PE10 | D7 |
| PE11 | D8 |
| PE12 | D9 |
| PE13 | D10 |
| PE14 | D11 |
| PE15 | D12 |
| PF0 | A0 |
| PF1 | A1 |
| PF2 | A2 |
| PF3 | A3 |
| PF4 | A4 |
| PF5 | A5 |
| PF6 | UART7_RXD |
| PF7 | UART7_TXD |
| PF8 | VBUS_ADC |
| PF9 | L2 |
| PF10 | L1 |
| PF11 | SD_NDRAS |
| PF12 | A6 |
| PF13 | A7 |
| PF14 | A8 |
| PF15 | A9 |
| PG0 | A10 |
| PG1 | A11 |
| PG2 | A12 |
| PG3 | A13 |
| PG4 | A14 |
| PG5 | A15 |
| PG6 | LED_A1 |
| PG7 | DIP_SWITCH |
| PG8 | SD_CLK |
| PG9 | USART6_RXD |
| PG10 | USART6_RXD |
| PG11 | ETH_TXEN |
| PG12 | - |
| PG13 | ETH_TXD0 |
| PG14 | ETH_TXD1 |
| PG15 | SD_NCAS |
| PH0 | OSC+IN |
| PH1 | OSC_OUT |
| PH2 | SD_CKE0 |
| PH3 | SD_NE0 |
| PH4 | I2C2_SCL |
| PH5 | I2C2_SDA |
| PH6 | - |
| PH7 | - |
| PH8 | RS485_DRIVER_ENABLE1 |
| PH9 | RS485_RECEIVER_ENABLE1 |
| PH10 | RS485_DRIVER_ENABLE2 |
| PH11 |
RS485_RECEIVER_ENABLE2 |
| PH12 | LED_A4 |
| PH13 | - |
| PH14 | LED_A2 |
| PH15 | CONF5 |
| PI0 | WP#//ACC |
| PI1 | SPI2_SCK |
| PI2 | SPI2_MISO |
| PI3 | SPI2_MOSI |
| PI4 | SPI2_W |
| PI5 | SPI2_IO3 |
| PI6 | ETH_RST |
| PI7 | RS485_DRIVER_ENABLE3 |
| PI8 | RS485_RECEIVER_ENABLE3 |
| PI9 | LED_5 |
| PI10 | RS485_TERMINATION_ENABLE4 |
| PI11 | RS485_TERMINATION_ENABLE3 |
| PI12 | SPI2_SS |
| PI13 | - |
| PI14 | RS485_RECEIVER_ENABLE4 |
| PI15 | RS485_DRIVER_ENABLE4 |
Optional
| Element | Connection |
| HTS221 | |
| VDD | +3V3 |
| CS | +3V3 |
| GND | GND |
| SCL/SPC | I2C2_SCL |
| SDA/SDI/SDO | I2C2_SDA |
| DRDY | - |
| LIS3DH | |
| VDD_IO | +3V3 |
| NC | - |
| NC | - |
|
SCL/SPC |
I2C2_SCL |
|
GND |
GND |
| SDA/SDI/SDO | I2C2_SDA |
| SDO/SAO | - |
| CS | +3V3 |
| ADC1 | - |
| ADC2 | - |
| VDD | +3V3 |
| ADC3 | - |
| GND | GND |
| INT1 | - |
| RES | GND |
| INT2 | - |
| LSM6DS33 | |
| GND, GND, RES, RES, RES, RES | GND |
| INT1 | - |
| INT2 | - |
| VDDIO | +3V3 |
| SCL | I2C2_SCL |
| SDA | I2C2_SDA |
| SDO | - |
| CS | +3V3 |
| NC | - |
| RES | GND |
| VDD | +3V3 |
| SI7006-A20/SI7020-A20 | |
| SDA | I2C2_SDA |
| SCL | I2C2_SCL |
| GND | GND |
| VDD | +3V3 |
| DNC1 | - |
| DNC2 | - |