RAK19003 WisBlock Mini Base Board Datasheet
Overview
Description
RAK19003 WisBlock Mini Base module is the new main board that allows you to attach WisBlock modules through the standardized expansion connectors. In addition, the WisBlock Mini Base module also comprises a Type-C USB connector, indicator LEDs, button, and sensor connectors.
If you can't find a module that fits your IoT requirements, use the standard connectors of WisBlock to develop your own specific function module. WisBlock supports open-source hardware architecture and you can find tutorials showing how to create your own Awesome WisBlock module.
Applications
- Wireless Sensor Network
- Environmental monitoring
- Wireless data transmission
- Data acquisition in the industrial environment
- Location and tracking of personnel or moving objects
Features
- Flexible building block design, which enables modular function realization and expansion
- High-speed interconnection connectors in the WisBlock Base board to ensure the signal integrity
- Supports multiple types of low power MCUs
- Supports multiple types of sensors. A single board can support a combination of two different types of sensors
- Low power battery power supply
- Supports lithium battery charging
- Supports solar charging
- Fulfills Industrial level design
- Compact size: 30 x 35 mm
Specifications
RAK19003 is a WisBlock Base board that connects WisBlock Core and WisBlock Modules. It provides the power supply and interconnection to the modules attached to it. It has one slot reserved for the WisBlock Core module and two Slot C-D for WisBlock Modules. The WisBlock Core is attached on the top side, and the WisBlock Modules are attached to the bottom side of the RAK19003 WisBlock Base board. Slot D holds modules up to 23 mm in size, while Slot C supports 10 mm WisBlock Modules. Also, there are two 2.54 mm pitch headers for extension interface with BOOT, I2C, and UART pins.
For convenience, there is a Type-C USB connector that is connected directly to WisBlock Core MCU’s USB port (if supported) or to a USB-UART converter depending on the WisBlock Core. It can be used for uploading firmware or serial communication. The USB-C connector is also used as a battery charging port.
WisBlock Modules are connected to the RAK19003 WisBlock Base board via high-speed board to board connectors. They provide secure and reliable interconnection to ensure the signal integrity of each data bus. A set of screws are used for fixing the modules, which makes it reliable even in an environment with lots of vibrations.
Using RAK19003 as your WisBlock Base board, you can make your project compact, which is ideal in small enclosures. You can also use a RAK19005 WisBlock Sensor Extension Cable to position WisBlock Modules apart from the WisBlock Base board or in any part of your case.
Board Overview
Figure 1: RAK19003 WisBlock Mini Base Top (Left) and Bottom (Right) ViewBlock Diagram
The block diagram in Figure 2 shows the internal architecture and external interfaces of the RAK19003 board.
Figure 1: RAK19003 Mini Base Block DiagramHardware
The hardware specification is categorized into six parts. It discusses the interfacing, pinouts, and their corresponding functions and diagrams. It also covers the electrical, mechanical, and environmental parameters that include the tabular data of the functionalities and standard values of the RAK19003 WisBlock Mini Base.
Interfaces
RAK19003 WisBlock Mini Base provides the following interfaces, headers, button, and WisConnectors:
- 1 WisBlock Core module
- 2 WisBlock Modules compatible with Slot C-D
- 1 Type-C USB port for programming and debugging
- 3.7 V Rechargeable battery connector
- 5 V Solar Panel connector
- 2 Headers with BOOT, I2C, and UART pins accessible with solder contacts
Additionally, it has two user-definable LEDs - one power supply/charging indicator LED and a reset button.
Figure 3 and Figure 4 show the location of RAK19003 main components.
Figure 1: RAK19003 Top View Components
Figure 1: RAK19003 Bottom View ComponentsType-C USB port
The Type-C USB connector is compliant with the USB 2.0 specification. This USB interface directly communicates with the connected WisBlock Core module. It is also used as a charging input port for the battery. Here are some of the advantages of the Type-C USB connector:
- Smaller and reversible connector shape
- Port can be input or output
- Fast battery charging
Figure 1: USB Type-C receptacle pinoutJ6 and J7 Headers
On the WisBlock Mini Base board, there are two 2.54 mm pitch headers for the IO extension. BOOT, I2C, and UART pins from the WisBlock Core module are also connected to these headers.
J6 Header Pinout
| Pin | Pin Name | Description |
|---|---|---|
| 1 | VDD | 3.3 V |
| 2 | GND | Ground pin |
| 3 | SCL | I2C1 Clock |
| 4 | SDA | I2C1 Data |
J7 Header Pinout
| Pin | Pin Name | Description |
|---|---|---|
| 1 | RX1 | UART1 Rx pin |
| 2 | TX1 | UART1 Tx pin |
| 3 | GND | Ground pin |
| 4 | BOOT | MCU Boot pin |
BOOT pin is used on startup configuration or sequence of the WisBlock Core connected to it. It is commonly used for uploading the bootloader and/or application firmware. The requirements of the state of the BOOT pin depend on the specific model of the WisBlock Core used.
Battery Connector
Figure 6 shows the battery connector V+(VBAT) and GND.
Figure 1: Battery Connector Pin OrderThe voltage of the battery must not exceed 4.3 V.
Solar Panel Connector
Figure 7 shows the solar panel connector V+(Vin) and GND.
Figure 1: Solar Panel Connector V+ and GNDThe output voltage of the solar panel must not exceed 5.5 V. Otherwise, it may cause permanent damage to the board.
LEDs
Three LEDs are used to indicate the operating status. Below are the functions of the LEDs:
- 🔴 Red LED - Connected to the charger chip to indicate the charger status. When the battery is charging, this red LED is on. When the battery is full, this LED is weak light or off.
- 🟢 Green LED - Connected to the MCU module, controlled by MCU defined by the user.
- 🔵 Blue LED - Connected to the MCU module, controlled by MCU defined by the user.
RESET Push Button
The Reset Push Button is connected to the MCU module. When pushed, it resets the MCU.
Pin Definition
Connector for WisBlock Core
The WisCore module connector is a 40-pin board-to-board connector. It is a high-speed and high-density connector, with an easy attaching mechanism.
Figure 1: WisCore module connectorThe table below shows the pinout of the 40-pin MCU module connector:
| Pin Number | Function Name of WisBlock Base | Pin Number | Function Name of WisBlock Base |
|---|---|---|---|
| 1 | VBAT | 2 | VBAT |
| 3 | GND | 4 | GND |
| 5 | 3V3 | 6 | 3V3 |
| 7 | USB+ | 8 | USB– |
| 9 | VBUS | 10 | SW1 |
| 11 | TXD0 | 12 | RXD0 |
| 13 | RESET | 14 | LED1 |
| 15 | LED2 | 16 | LED3 |
| 17 | VDD | 18 | VDD |
| 19 | I2C1_SDA | 20 | I2C1_SCL |
| 21 | AIN0 | 22 | AIN1 |
| 23 | BOOT0 | 24 | IO7 |
| 25 | SPI_CS | 26 | SPI_CLK |
| 27 | SPI_MISO | 28 | SPI_MOSI |
| 29 | IO1 | 30 | IO2 |
| 31 | IO3 | 32 | IO4 |
| 33 | TXD1 | 34 | RXD1 |
| 35 | I2C2_SDA | 36 | I2C2_SCL |
| 37 | IO5 | 38 | IO6 |
| 39 | GND | 40 | GND |
As for the following table, it shows the definition of each pin of the WisBlock Core connector:
| Pin Number | Pin Name | Type | Description |
|---|---|---|---|
| 1 | VBAT | S | Power supply from battery |
| 2 | VBAT | S | Power supply from battery |
| 3 | GND | S | Ground |
| 4 | GND | S | Ground |
| 5 | 3V3 | S | 3.3 V power supply |
| 6 | 3V3 | S | 3.3 V power supply |
| 7 | USB+ | I/O | USB D+ |
| 8 | USB– | I/O | USB D– |
| 9 | VBUS | S | USB VBUS |
| 10 | SW1 | I/O | Not connected |
| 11 | TXD0 | I/O | MCU UART0 TX signal |
| 12 | RXD0 | I/O | MCU UART0 RX signal |
| 13 | RESET | I | Connected to the reset switch, for MCU reset |
| 14 | LED1 | I/O | LED for battery charging indication |
| 15 | LED2 | I/O | LED for custom usage |
| 16 | LED3 | I/O | LED for custom usage |
| 17 | VDD | S | Generated by MCU module for power sensor board if the MCU IO level is not 3.3 V |
| 18 | VDD | S | Generated by MCU module for power sensor board if the MCU IO level is not 3.3 V |
| 19 | I2C1_SDA | I/O | The first set of I2C data signal |
| 20 | I2C1_SCL | I/O | The first set of I2C clock signal |
| 21 | AIN0 | A | Analog input for ADC |
| 22 | AIN1 | A | Analog input for ADC |
| 23 | BOOT0 | I | For ST MCU only. The MCU will enter boot mode if this pin is connected to VDD. |
| 24 | IO7 | I/O | Not connected |
| 25 | SPI_CS | I/O | SPI chip select signal |
| 26 | SPI_CLK | I/O | SPI clock signal |
| 27 | SPI_MISO | I/O | SPI MISO signal |
| 28 | SPI_MOSI | I/O | SPI MOSI signal |
| 29 | IO1 | I/O | General purpose IO |
| 30 | IO2 | I/O | Used for 3V3_S enable |
| 31 | IO3 | I/O | General purpose IO |
| 32 | IO4 | I/O | General purpose IO |
| 33 | TXD1 | I/O | MCU UART1 RX signal |
| 34 | RXD1 | I/O | MCU UART1 RX signal |
| 35 | I2C2_SDA | I/O | The second set of I2C data signal |
| 36 | I2C2_SCL | I/O | The second set of I2C clock signal |
| 37 | IO5 | I/O | General purpose IO |
| 38 | IO6 | I/O | General purpose IO |
| 39 | GND | S | Ground |
| 40 | GND | S | Ground |
Connectors for WisBlock Sensor
The WisBlock sensor module connector is a 24-pin board-to-board connector.
Figure 1: WisSensor module connectorThere are two connectors reserved for the sensor modules on the RAK19003. The pinout definition of the WisBlock modules with 24-pin connector on WisBlock Mini Base varies according to its connector.
| Connector C | Connector D | Pin Number | Pin Number | Connector C | Connector D |
|---|---|---|---|---|---|
| TXD1 | TXD1 | 1 | 2 | GND | GND |
| SPI_CS | SPI_CS | 3 | 4 | SPI_CLK | SPI_CLK |
| SPI_MISO | SPI_MISO | 5 | 6 | SPI_MOSI | SPI_MOSI |
| I2C1_SCL | I2C1_SCL | 7 | 8 | I2C1_SDA | I2C1_SDA |
| VDD | VDD | 9 | 10 | IO4 | IO6 |
| 3V3_S | 3V3_S | 11 | 12 | IO3 | IO5 |
| NC | NC | 13 | 14 | 3V3_S | 3V3_S |
| NC | NC | 15 | 16 | VDD | VDD |
| NC | NC | 17 | 18 | NC | NC |
| NC | NC | 19 | 20 | NC | NC |
| NC | NC | 21 | 22 | NC | NC |
| GND | GND | 23 | 24 | RXD1 | RXD1 |
As for the following table, it shows the pin name and description of each pin in the WisSensor module connector.
| Pin Number | Connector C | Connector D | Type | Description |
|---|---|---|---|---|
| 1 | TXD1 | TXD1 | I/O | UART TX signal |
| 2 | GND | GND | S | Ground |
| 3 | SPI_CS | SPI_CS | I/O | SPI chip select signal |
| 4 | SPI_CLK | SPI_CLK | I/O | SPI clock signal |
| 5 | SPI_MISO | SPI_MISO | I/O | SPI MISO signal |
| 6 | SPI_MOSI | SPI_MOSI | I/O | SPI MOSI signal |
| 7 | I2C1_SCL | I2C1_SCL | I/O | I2C clock signal |
| 8 | I2C1_SDA | I2C1_SDA | I/O | I2C data signal |
| 9 | VDD | VDD | S | Generated by CPU module. Used to power sensor board if MCU IO level is not 3.3 V |
| 10 | IO4 | IO6 | I/O | General purpose IO pin. When 3V3_S is used, this pin cannot be used as an interrupt input. |
| 11 | 3V3_S | 3V3_S | S | 3.3 V power supply. This power pin is controlled by IO2 from the WisBlock Core module. |
| 12 | IO3 | IO5 | I/O | General purpose IO pin. When 3V3_S is used, this pin cannot be used as an interrupt input. |
| 13 | NC | NC | NC | Not connected |
| 14 | 3V3_S | 3V3_S | S | 3.3 V power supply. This power pin is controlled by IO2 from the WisBlock Core module. |
| 15 | NC | NC | NC | Not connected |
| 16 | VDD | VDD | S | Generated by CPU module. Used to power sensor board if the MCU IO level is not 3.3 V. |
| 17 | NC | NC | NC | Not connected |
| 18 | NC | NC | NC | Not connected |
| 19 | NC | NC | NC | Not connected |
| 20 | NC | NC | NC | Not connected |
| 21 | NC | NC | NC | Not connected |
| 22 | NC | NC | NC | Not connected |
| 23 | GND | GND | S | Ground |
| 24 | RXD1 | RXD1 | I/O | UART RX signal |
Electrical Characteristics
Absolute Maximum Ratings
The Absolute Maximum Ratings of the device are shown in the table below. The stress ratings are the functional operation of the device.
- If the stress rating goes above what is listed, it may cause permanent damage to the device.
- Under the listed conditions is not advised.
- Exposure to maximum rating conditions may affect the device reliability.
| Ratings | Maximum Value | Unit |
|---|---|---|
| Power Supply on the USB port (VBUS) | –0.3 to 5.5 | V |
| Battery Voltage (VBAT) | –0.3 to 4.3 | V |
| Solar Panel Voltage (CONN_S) | –0.3 to 5.5 | V |
| IOs of WisConnector | –0.3 to VDD+0.3 | V |
| ESD | 2000 | V |
The RAK19003, as any electronic equipment, is sensitive to electrostatic discharge (ESD). Improper handling can cause permanent damage to the module.
Current Consumption
The RAK19003 is designed for low-power IoT products. Its power supply uses a high-efficiency low ground current regulator. When there is no module on RAK19003, the leakage current is lower than 2 µA. With WisBlock Core and WisBlock sensor on it, the sleep current is lower than 10 µA. When a LoRa module is transmitting, the current may reach 130 mA.
| Conditions | Current | Unit |
|---|---|---|
| Leakage current, without any module on RAK19003 | 2 | µA |
| Idle current, with WisBlock Core and WisBlock Modules in sleep mode | 10 | µA |
| Working current, with LoRa module transmitting | 130 | µA |
| Maximum output current | 750 | mA |
Battery Connector
The RAK19003 WisBlock Mini Base Board can be powered by a battery, connected to the P2 connector. The nominal operating voltage of the battery should be within the range shown in the following table. The matching connector for the battery wires is a JST PHR-2 2 mm pitch female
| Minimum | Typical | Maximum | Unit |
|---|---|---|---|
| 3.3 | 3.7 | 4.3 | V |
The USB connector is used as a charging port. The voltage and current fed to the battery through the port should not exceed its charging limits, as shown in the table below.
| Parameter | Value |
|---|---|
| Charging Voltage | 4.5 – 5.5 V |
| Charging Current | 350 mA |
A suitable Li-Ion battery should have the following parameters as shown in the table below:
| Parameter | Value |
|---|---|
| Standard Voltage | 3.7 V |
| Charging Voltage | 4.2 V |
| Capacity | As required |
| Discharge current | At least 500 mA |
Don't use a non-rechargeable battery.
Solar Panel Connector
A 5 V Solar Panel can be connected to the board via the P1 connector. The solar panel can also be used to charge the Li-Ion battery. The matching connector for the solar panel wires is a JST ZHR-2 1.5 mm pitch female.
Mechanical Characteristics
Board Dimensions
You may also refer and download the M1.2 Stand-off fastener/inserts datasheet.
Figure 10 shows the detailed mechanical dimensions of RAK19003 versions Ver. A and Ver. B.
Figure 1: RAK19003 Ver. A and Ver. B Mechanical DimensionsFigure 11 shows the detailed mechanical dimensions of RAK19003 versions Ver. C and newer.
Figure 1: RAK19003 Ver. C and newer Mechanical DimensionsFigure 12 and Figure 13 show the mounting holes location and diameter of the RAK19003 Board (same for all versions).
Figure 1: RAK19003 Mounting Holes Location and Diameter
Figure 1: RAK19003 Mounting Holes Location and DiameterWisConnector PCB Layout
Figure 1: WisConnector PCB Footprint and RecommendationsEnvironmental Characteristics
The table below lists the operation and storage temperature requirements of RAK19003:
| Parameter | Minimum | Typical | Maximum |
|---|---|---|---|
| Operational Temperature Range | –35 ºC | +25 ºC | +75 ºC |
| Extended Temperature Range | –40 ºC | +25 ºC | +80 ºC |
| Storage Temperature Range | –40 ºC | +25 ºC | +80 ºC |
Schematic Diagram
The component schematic diagram of RAK19003 is shown in Figure 15 and Figure 16.
Figure 1: RAK19003 Schematic Diagram
Figure 1: RAK19003 Schematic Diagram (Connectors)
