RAK11200 WisBlock WiFi Module Datasheet
Overview
Description
RAK11200 is a WisBlock Core module for RAK WisBlock based on Espressif ESP32-WROVER. It is a powerful, generic WiFi-BLE MCU module that targets a wide variety of applications. There are two CPU cores that can be individually controlled and the CPU clock frequency is adjustable from 80 MHz to 240 MHz. The low-power deep-sleep current consumption of the ESP32-WROVER is about 10 uA. This makes the RAK11200 an ultra-low-power communication solution. RAK11200 can be comfortably programmed with the Arduino™ IDE or PlatformIO.
Features
- Two low-power Xtensa® 32-bit LX6 microprocessors
- Up to 240 MHz CPU clock
- Built-in PCB antenna
- 4 MB External SPI Flash, 520 KB RAM
- 8 MB SPI Pseudo static RAM (PSRAM)
- WiFi 802.11 b/g/n (802.11n up to 150 Mbps)
- Bluetooth v4.2 BR/EDR and BLE specification
- Rich set of peripherals: RTC, UART, I2C, SPI, SD card interface
- low-power deep-sleep mode
- Chipset: Espressif ESP32-WROVER
Specifications
Overview
Board Overview
The RAK11200 WisBlock WiFi Module back view and front view (top) can be seen in Figure 1.
Figure 1: RAK11200 WiFi Module OverviewMounting Sketch
Figure 2 shows RAK11200 module mounting sketch with the WisBase RAK5005-O board.
Figure 2: RAK11200 WiFi Module Mounting SketchHardware
The hardware specification is categorized into four parts. It discuses the interfacing of the module and its corresponding functions and diagrams. It also covers the electrical and mechanical parameters that include the tabular data of the functionalities and standard values of the RAK11200 WisBlock WiFi Module.
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Different from other ESP32 boards, the RAK11200 needs to be put manually into download mode. If you do not force the RAK11200 into download mode, you cannot upload your sketch from Arduino IDE (or PlatformIO) to the board.
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To force the RAK11200 into download mode, you need to connect the pin BOOT0 on the WisBlock Base RAK5005-O to GND and push the reset button.
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The BOOT0 pin is on the J10 pin header, the GND pin is next to it.
Pin headers and jumpers are included on the RAK11200, which can be soldered to the WisBlock Base and help with BOOT0 pin accessibility.
Figure 3: Force ESP32 Download modeChipset
| Vendor | Part number |
|---|---|
| Espressif | ESP32-WROVER |
Interfaces
UART Interface
The RAK11200 module provides two UART interfaces: UART0 and UART1. The UART0 can be used for firmware upgrades or to access console output through the WisBlock baseboard USB interface. The UART1 is the main communication interface with WisIO or WisSensor modules.
UART0 Programming Port
To support USB, the RAK11200 has a USB-to-UART converter onboard to connect the ESP32's UART0 to the USB connector. Figure 4 shows the RAK11200 module UART programming circuit.
Figure 4: RAK11200 USB to UART schematicSPI Interface
The RAK11200 supports one single SPI Interface in full-duplex or half-duplex communication modes. The SPI interface supports the following features:
- Both master and slave modes;
- Configurable SPI frequency;
- Four SPI transfer modes, which is defined by the polarity (CPOL) and the phase (CPHA) of the SPI clock;
- An internal FIFO buffer of 64-byte.
I2C Interface
The RAK11200 module provides two I2C bus interfaces. The module allows you to access directly the registers to control I2C interfaces, which adds more flexibility to the design of the final product. Depending on your configuration, it can serve as an I2C master mode. The I2C interface supports:
- Standard mode (100 Kbit/s) and Fast mode (400 Kbit/s);
- Up to 5 MHz, constrained by the SDA pull-up strength;
- 7-bit/10-bit addressing mode.
Pin Definition
The RAK11200 module has an ESP32-WROVER module at its core. Figure 5 shows the core module pins and connection information.
Figure 5: RAK11200 Core module pin connection| Pin number WisBlock | Function | Pin name | Pin number ESP32 |
|---|---|---|---|
| 1 | VBAT | VBAT | -- |
| 2 | VBAT | VBAT | -- |
| 3 | GND | GND | 1, 15, 38 |
| 4 | GND | GND | 1, 15, 38 |
| 5 | 3V3 | 3V3 | 2 |
| 6 | 3V3 | 3V3 | 2 |
| 7 | USB_DP | USB_DP | -- |
| 8 | USB_DN | USB_DN | -- |
| 9 | NC | NC | -- |
| 10 | SW1 | GPIO34 | 6 |
| 11 | UART0_TX | GPIO1 | 35 |
| 12 | UART0_RX | GPIO3 | 34 |
| 13 | EN | EN | 3 |
| 14 | LED1 | GPIO12 | 14 |
| 15 | LED2 | GPIO2 | 24 |
| 16 | NC | NC | -- |
| 17 | 3V3 | 3V3 | 2 |
| 18 | 3V3 | 3V3 | 2 |
| 19 | I2C1_SDA | GPIO4 | 26 |
| 20 | I2C1_SCL | GPIO5 | 29 |
| 21 | AIN0 | GPIO36 | 4 |
| 22 | AIN1 | GPIO39 | 5 |
| 23 | BOOT | GPIO0 | 25 |
| 24 | NC | NC | -- |
| 25 | SPI_CS | GPIO32 | 8 |
| 26 | SPI_CLK | GPIO33 | 9 |
| 27 | SPI_MISO | GPIO35 | 7 |
| 28 | SPI_MOSI | GPIO25 | 10 |
| 29 | IO1 | GPIO14 | 13 |
| 30 | IO2 | GPIO27 | 12 |
| 31 | IO3 | GPIO26 | 11 |
| 32 | IO4 | GPIO23 | 37 |
| 33 | UART1_TX | GPIO21 | 33 |
| 34 | UART1_RX | GPIO19 | 31 |
| 35 | I2C2_SDA | GPIO15 | 23 |
| 36 | I2C2_SCL | GPIO18 | 30 |
| 37 | IO5 | GPIO13 | 16 |
| 38 | IO6 | GPIO22 | 36 |
| 39 | GND | GND | 1, 15, 38 |
| 40 | GND | GND | 1, 15, 38 |
RF Specifications
BLE Radio
Receiver
| Parameter | Conditions | Min | Typ | Max | Unit |
|---|---|---|---|---|---|
| Sensitivity @30.8% PER | - | -94 | -93 | -92 | dBm |
| Maximum received signal @30.8% PER | - | 0 | - | - | dBm |
| Co-channel C/I | - | - | +10 | - | dBm |
| Intermodulation | - | -36 | - | - | dBm |
Transmitter
| Parameter | Conditions | Min | Typ | Max | Unit |
|---|---|---|---|---|---|
| RF transmit power | - | - | 0 | 0 | dBm |
| Gain control step | - | - | 3 | - | dBm |
| RF power control range | - | -12 | - | +9 | dBm |
| Drift rate | - | - | 0.7 | - | kHz/50us |
| Drift | - | - | 2 | - | kHz |
WiFi Radio
| Parameter | Condition | Min | Typ | Max | Unit |
|---|---|---|---|---|---|
| Operating frequency range | - | 2412 | - | 2484 | MHz |
| TX power | 11b mode | 17.5 | 18.5 | 20 | dBm |
| TX power | 11n MCS7 | 12 | 13 | 14 | dBm |
| Sensitivity | 11b, 1 Mbps | - | -97 | - | dBm |
Electrical Characteristics
Absolute Maximum Ratings
| Symbol | Description | Min. | Typical | Max. | Unit |
|---|---|---|---|---|---|
| VBAT | Power supply for the module | 0.5 | - | 4.2 | V |
| VDD | Power supply for ESP32 module | 2.3 | 3.3 | 3.6 | V |
| Iout | Step down IC output current | - | - | 700 | mA |
Recommended Operating Conditions
| Symbol | Description | Min. | Typical | Max. | Unit |
|---|---|---|---|---|---|
| VBAT | Power supply for the module | 3.1 | - | 4.2 | V |
| VDD | Power supply for ESP32 module | 3.0 | 3.3 | 3.6 | V |
| TOPR | Operation Temperature | -40 | - | 85 | ℃ |
Mechanical Characteristics
Board Dimensions
Figure 6: RAK11200 Board DimensionsWisConnector PCB Layout
Figure 7: WisConnector PCB footprint and recommendationsSchematic Diagram
Figure 8: RAK11200 Schematic DiagramRAK11200 is a WisBlock Core module for RAK WisBlock based on Espressif ESP32-WROVER. It is a powerful, generic WiFi-BLE MCU module that targets a wide variety of applications. There are two CPU cores that can be individually controlled and the CPU clock frequency is adjustable from 80 MHz to 240 MHz. The low-power deep-sleep current consumption of the ESP32-WROVER is about 10 uA. This makes the RAK11200 an ultra-low-power communication solution. RAK11200 can be comfortably programmed with the Arduino™ IDE or PlatformIO.
