RAKwireless RAK19003 WisBlock Mini Base Board, USB-C, LoRa/IoT

Product detailed description

RAKwireless RAK19003 is the smallest base board of the WisBlock modular system – on a 30 × 35 mm footprint, it carries a WisBlock Core processor module and two WisBlock Sensor modules. It handles the power supply and interconnection of the deployed modules and can be powered via USB-C, a Li-Ion battery, or a solar panel, with an integrated charger that recharges the battery automatically. Compared to the larger RAK19007 board, you lose the IO slot and two sensor slots, but in return, the finished device fits into a truly small enclosure – a popular choice for pocket-sized Meshtastic nodes and battery-powered LoRaWAN sensors. Quiescent current consumption in microamperes and programmatically switchable power for sensors make this board an excellent base for devices intended to run on battery for months.

Specifications:

• Model: RAK19003 (WisBlock Mini Base Board)
• Module slots:
  • CPU slot (WisBlock Core): 1×, 40-pin board-to-board connector, module is mounted from the top
  • Sensor slots C and D: 2×, 24-pin connectors, modules are mounted from the bottom of the board
  • Module height: slot D up to 23 mm, slot C up to 10 mm
  • IO slot: none (for WisBlock IO modules, use the RAK19007 or RAK19001 board)
• Power Supply:
  • USB: USB-C (USB 2.0), connected directly to the Core module MCU – for both programming and serial communication
  • Battery: Li-Ion 3.7 V, range 3.3–4.3 V
  • Solar panel: 5 V (max. 5.5 V)
  • Maximum output current: 750 mA
• Battery charging:
  • Charging voltage: 4.5–5.5 V (via USB-C or solar panel)
  • Charging current: 350 mA
  • Recommended battery: Li-Ion 3.7 V, charging voltage 4.2 V, discharge current at least 500 mA
• Power connectors:
  • Battery (P2): JST PHR-2, 2.0 mm pitch, 2 pins
  • Solar panel (P1): JST ZHR-2, 1.5 mm pitch, 2 pins
• Power management: the 3V3_S branch for sensors can be programmatically turned off from the Core module (pin IO2)
• Power consumption:
  • Leakage current (without modules): 2 µA
  • Quiescent current (Core and sensors in sleep): 10 µA
  • LoRa Transmission: up to 130 mA
• Expansion Pins: 2× 4-pin header with 2.54 mm pitch (solder pads)
  • J6: VDD (3.3 V), GND, SCL, SDA
  • J7: RX1, TX1, GND, BOOT
• Signalling: 3 LEDs – red (charging status), green and blue (user programmable)
• Controls: RESET button (resets Core module MCU)
• Dimensions: 30 × 35 mm
• Operating Temperature: –35 °C to +75 °C (extended range –40 °C to +80 °C)
• Storage Temperature: –40 °C to +80 °C
• Compatibility: WisBlock Core and WisBlock Sensor modules; development in Arduino IDE, PlatformIO or RUI3, Meshtastic firmware support (depending on the Core module used)

What you need for the board:

• WisBlock Core processor module (the board does not function without it):
  • RAKwireless RAK4631 WisBlock Core, nRF52840 SX1262, LoRa/BLE module for LoRaWAN and Meshtastic
• WisBlock sensor modules:
  • RAKwireless RAK1901 WisBlock Sensor - SHTC3 Air Temperature and Humidity Sensor
• Battery power (JST-PH 2.0 mm connector):
  • LaskaKit LiPol Battery 654060 2000mAh 3.7V JST-PH 2.0
  • LaskaKit LiPol Battery 125054 4000mAh 3.7V JST-PH 2.0
• Solar charging (panel max. 5.5 V):
  • Solar Panel - 5V 1W
  • Solar Panel - 5V 3W
• 868 MHz Antennas for LoRa:
  • NiceRF SW868-ZD115 Antenna 2.15dBi 11cm 868MHz
  • NiceRF SW868-ZT48 Antenna 2.15dBi 5cm 868MHz
• Complete assembly instead of building:
  • RAKwireless WisBlock Meshtastic Starter Kit - RAK19007 + RAK4631, 868 MHz

Package contents:

• 1× RAK19003 Base Board
• 1× USB-C Cable
• 1× Mounting Screw Set

Note:

• The board on its own is not a functional device – it requires at least one WisBlock Core module.
• Connect only rechargeable Li-Ion batteries; the board does not have a charging profile for LiFePO4 or NiMH, and non-rechargeable batteries must not be connected.
• The battery voltage must not exceed 4.3 V and the solar panel voltage 5.5 V, otherwise there is a risk of permanent damage to the board.
• Sensor modules are mounted from the bottom on this board – keep this in mind when designing the enclosure.
• This product is not a standalone functional unit and may require professional installation.
• Product images are for illustrative purposes only and may sometimes differ from the actual appearance of the item. However, this does not change their basic properties.