KG100S Radio board (KG100S-RB4332A)

Overview

The KG100S Radio Board (BRD4332A) is designed to work with the Wireless Pro Kit Mainboard (BRD4002A, not included) to support the development of wireless IoT devices based on Amazon Sidewalk. The kit provides a complete reference design featuring the Quectel KG100S module, which integrates a Silicon Labs EFR32BG21 2.4 GHz Bluetooth SoC together with a Semtech SX1262 LoRa transceiver for Sub-GHz operation. See Radio Boards for more information about the Wireless Mainboard platform.

Hardware

Quectel KG100S module based on EFR32BG21B010F1024IM32
CPU core: ARM Cortex®-M33 with FPU, DSP and TrustZone
Memory: 1024 kB Flash, 96 kB RAM
Transmit power: up to +10 dBm
Operation frequency: 2.4 GHz (Bluetooth) and Sub-GHz (LoRa via SX1262)
Crystals for LFXO (32.768 kHz) and HFXO (38.4 MHz)
Semtech SX1262 LoRa transceiver
2 user buttons

For more information about the KG100S, EFR32BG21 SoC and the LoRa radio SX1262, refer to these documents:

Supported Features

The kg100s_rb4332a board supports the hardware features listed below.

on-chip / on-board: Feature integrated in the SoC / present on the board.
2 / 2: Number of instances that are enabled / disabled.
Click on the label to see the first instance of this feature in the board/SoC DTS files.
vnd,foo: Compatible string for the Devicetree binding matching the feature.
Click on the link to view the binding documentation.

`kg100s_rb4332a/efr32bg21b010f1024im32` target

On-target memory for this board target: 96 KiB of RAM, 1 MiB of Flash.

Type	Location	Description	Compatible
CPU	on-chip	ARM Cortex-M33 CPU1	`arm,cortex-m33`
ADC	on-chip	Silicon Labs Series 2 IADC1	`silabs,iadc`
Bluetooth	on-chip	Silicon Labs Series 2 Bluetooth HCI1	`silabs,bt-hci-efr32`
Clock control	on-chip	Silicon Labs Series 2 CMU1	`silabs,series-clock`
	on-chip	Silicon Labs Series 2 HFXO1	`silabs,hfxo`
	on-chip	Silicon Labs Series 2 HFRCODPLL1	`silabs,series2-hfrcodpll`
	on-chip	Generic fixed-rate clock provider3	`fixed-clock`
	on-chip	Silicon Labs Series 2 LFXO1	`silabs,series2-lfxo`
	on-chip	Silicon Labs Series 2 LFRCO1	`silabs,series2-lfrco`
	on-chip	Silicon Labs Series 2 HFRCOEM231	`silabs,series2-hfrcoem23`
	on-chip	Generic fixed factor clock provider15	`fixed-factor-clock`
Comparator	on-chip	Silicon Labs Series 2 ACMP2	`silabs,acmp`
Counter	on-chip	Silicon Labs TIMER Counter4	`silabs,timer-counter`
	on-chip	Silicon Labs Series 2 BURTC1	`silabs,burtc-counter`
	on-chip	Silicon Labs PROTIMER counter1	`silabs,protimer`
CRC	on-chip	Silabs General Purpose CRC1	`silabs,gpcrc`
Cryptographic accelerator	on-chip	Silicon Labs Series 2 SE Mailbox1	`silabs,gecko-semailbox`
Debug	on-chip	Silicon Labs Packet Trace Interface1	`silabs,pti`
Debug	on-chip	ARMv8 instrumentation trace macrocell1	`arm,armv8m-itm`
DMA	on-chip	Silicon Labs Series 2 LDMA1	`silabs,ldma`
Flash controller	on-chip	Silicon Labs Series 2 MSC1	`silabs,series2-flash-controller`
GPIO & Headers	on-chip	Silicon Labs Series 2 GPIO Peripheral1	`silabs,gpio`
GPIO & Headers	on-chip	Silicon Labs Series 2 GPIO Port4	`silabs,gpio-port`
I2C	on-chip	Silicon Labs Series 2 I2C1 1	`silabs,i2c`
Input	on-board	Group of GPIO-bound input keys1	`gpio-keys`
Interrupt controller	on-chip	ARMv8-M NVIC (Nested Vectored Interrupt Controller)1	`arm,v8m-nvic`
LoRa	on-chip	Semtech SX1262 LoRa Modem1	`semtech,sx1262`
MMU / MPU	on-chip	ARMv8-M MPU (Memory Protection Unit)1	`arm,armv8m-mpu`
MTD	on-chip	Flash node1	`soc-nv-flash`
Networking	on-chip	Silicon Labs Series 2 Radio Interface1	`silabs,series2-radio`
Pin control	on-chip	Silicon Labs Series 2 DBUS Pin Controller1	`silabs,dbus-pinctrl`
PWM	on-chip	Silicon Labs TIMER PWM4	`silabs,timer-pwm`
PWM	on-chip	Silicon Labs LETIMER PWM1	`silabs,letimer-pwm`
Retained memory	on-chip	Silicon Labs Series 2 BURAM1	`silabs,buram`
RTC	on-chip	Silicon Labs Series 2 RTCC1	`silabs,rtcc`
Serial controller	on-chip	Silicon Labs Series 2 USART1 1	`silabs,usart-uart`
SPI	on-chip	Silicon Labs Series 2 USART1	`silabs,usart-spi`
SRAM	on-chip	Generic on-chip SRAM1	`mmio-sram`
Timer	on-chip	ARMv8-M System Tick1	`arm,armv8m-systick`
	on-chip	Silicon Labs TIMER2 2	`silabs,series2-timer`
	on-chip	Silicon Labs LETIMER1	`silabs,series2-letimer`
Watchdog	on-chip	Silicon Labs Series 0-2 WDOG2	`silabs,gecko-wdog`

System Clock

The EFR32BG21 SoC is configured to use the HFRCODPLL oscillator at 76.8 MHz as the system clock, locked to the 38.4 MHz external crystal oscillator on the board.

Serial Port

The EFR32BG21 SoC has three USARTs (USART0–USART2). USART0 is connected to the board controller and is used for the console. USART2 is used for SPI communication with the SX1262 LoRa transceiver.

Programming and Debugging

The kg100s_rb4332a board supports the runners and associated west commands listed below.

	flash	debug	debugserver	reset	rtt	attach
jlink	✅ (default)	✅ (default)	✅	✅	✅	✅
silabs_commander	✅

Connect the BRD4002A mainboard with a mounted BRD4332A radio board to your host computer using the USB port.

Here is an example for the Hello World application.

# From the root of the zephyr repository
west build -b kg100s_rb4332a samples/hello_world
west flash

Open a serial terminal (minicom, putty, etc.) with the following settings:

Speed: 115200
Data: 8 bits
Parity: None
Stop bits: 1

Reset the board and you should see the following message in the terminal:

Hello World! kg100s_rb4332a

Bluetooth

To use Bluetooth functionality, run the command below to retrieve necessary binary blobs from the Silicon Labs HAL repository.

west blobs fetch hal_silabs

Then build the Zephyr kernel and a Bluetooth sample with the following command. The Observer sample application is used in this example.

# From the root of the zephyr repository
west build -b kg100s_rb4332a samples/bluetooth/observer

LoRa

The board includes a Semtech SX1262 LoRa transceiver connected via USART2 (SPI mode). To build a LoRa sample:

# From the root of the zephyr repository
west build -b kg100s_rb4332a samples/drivers/lora/send