ThirdReality Temperature and Humidity Sensor Lite

Board Overview

ThirdReality Temperature and Humidity Sensor Lite

Name:

3r_tnh_sensor_lite

Vendor:

Third Reality, Inc.

Status:

Not actively maintained

Architecture:

riscv

SoC:

bl704l10q2i

Browse board sources

Overview

The ThirdReality Temperature and Humidity Sensor Lite integrates the BL704L SoC from Bouffalo Lab. Internally, the device breaks out the pinout for JTAG, as well as UART and the bootstrap pin, making it perfectly suited for development. BL704L is a highly integrated 802.15.4 (Zigbee/Thread/Matter) and BLE combo chipset for IoT applications.

Hardware

Pins 17-20 are broken out on the JTAG header.

For more information about the BouffaloLab BL704L MCU and the device:

• Bouffalo Lab BL702L MCU Datasheet

• Bouffalo Lab Development Zone

• ThirdReality Temperature and Humidity Sensor Lite

Supported Features

The 3r_tnh_sensor_lite 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.

3r_tnh_sensor_lite/bl704l10q2i target

Type	Location	Description	Compatible
CPU	on-chip	SiFive E24 Standard Core CPU1	sifive,e24
ADC	on-chip	Bouffalolab ADC1	bflb,adc
Cache	on-chip	Bouffalo Lab L1C cache control1	bflb,l1c
Clock control	on-chip	Generic fixed-rate clock provider31	fixed-clock
	on-chip	Bouffalolab F32K clock1	bflb,f32k
	on-chip	The BL70x/L DLL1	bflb,bl70x_l-dll
	on-chip	Bouffalolab Root Clock Represents both FCLK and HCLK depending on their presence, which should be kept the same1	bflb,root-clk
	on-chip	The BCLK clock, or peripheral clock Source -> / divider -> This Clock1	bflb,bclk
	on-chip	BFLB Flash Clock Source -> divider -> CLK Only has settings for Bank 1 on BL61x (boot flash) at the moment1	bflb,flash-clk
	on-chip	Bouffalolab BL70x(L) Clock Controller1	bflb,bl70x_l-clock-controller
Cryptographic accelerator	on-chip	Bouffalo Lab SEC Engine TRNG (True Random Number Generator)1	bflb,sec-eng-trng
	on-chip	Bouffalo Lab SEC Engine SHA hardware accelerator1	bflb,sec-eng-sha
	on-chip	Bouffalo Lab SEC Engine AES hardware accelerator1	bflb,sec-eng-aes
DMA	on-chip	Bouffalo Lab DMA1	bflb,dma
Flash controller	on-chip	Bouffalolab Flash Controller1	bflb,flash-controller
GPIO & Headers	on-chip	Bouffalo Lab BL60x and BL70x GPIO node1	bflb,bl60x_70x-gpio
I2C	on-chip	Bouffalolab I2C interface1	bflb,i2c
Input	on-board	Group of GPIO-bound input keys1	gpio-keys
Interrupt controller	on-chip	RISC-V CPU interrupt controller1	riscv,cpu-intc
	on-chip	RISC-V Core Local Interrupt Controller CLIC Pre-Standard v0.91	sifive,clic-draft
LED	on-board	Group of GPIO-controlled LEDs1	gpio-leds
	on-board	Group of PWM-controlled LEDs1	pwm-leds
MTD	on-board	Flash node1	soc-nv-flash
	on-board	Fixed partitions of a flash (or other non-volatile storage) memory1	fixed-partitions
Pin control	on-chip	Bouffalo Lab Pinctrl node1	bflb,pinctrl
Power management	on-chip	Bouffalolab Power Controller1	bflb,power-controller
PWM	on-chip	Bouffalolab PWM 11	bflb,pwm-1
	on-chip	Bouffalolab PWM 21	bflb,pwm-2
Regulator	on-chip	Bouffalolab HBN SoC (CPU, Memory, etc) voltage regulator It is a LDO with a canonical voltage of 1.10v It has two modes, but they are only switched between when going into sleep mode and do not share settings areas1	bflb,soc-regulator
	on-chip	Bouffalolab HBN AON (Always ON section) voltage regulator It is a LDO with a canonical voltage of 1.10v It has two modes, but they are only switched between when going into sleep mode and do not share settings areas1	bflb,aon-regulator
Sensors	on-board	Sensirion SHT4x humidity and temperature sensor1	sensirion,sht4x
Serial controller	on-chip	Bouffalo Lab UART1	bflb,uart
SPI	on-chip	Bouffalolab SPI1	bflb,spi
SRAM	on-chip	Generic on-chip SRAM1	mmio-sram
System controller	on-chip	BouffaloLab Efuse1	bflb,efuse
Timer	on-chip	RISC-V Machine Timer1	riscv,machine-timer
Watchdog	on-chip	Bouffalo Lab Watchdog Timer1	bflb,wdt

System Clock

The Device is configured to run at max speed (128MHz).

Serial Port

The 3r_tnh_sensor_lite board uses UART0 as default serial port.

Programming and Debugging

The 3r_tnh_sensor_lite board supports the runners and associated west commands listed below.

	flash	debug	debugserver	rtt	attach
bflb_mcu_tool	✅ (default)
openocd	✅	✅ (default)	✅	✅	✅

Samples

1. Build the Zephyr kernel and the Hello World sample application:

   # From the root of the zephyr repository
   west build -b 3r_tnh_sensor_lite samples/hello_world
   west flash
   

2. Run your favorite terminal program to listen for output. Under Linux the terminal should be /dev/ttyUSB0. For example:

   $ screen /dev/ttyUSB0 115200
   

   Connection should be configured as follows:

   • Speed: 115200

   • Data: 8 bits

   • Parity: None

   • Stop bits: 1

   Then, press and release RST button

   *** Booting Zephyr OS build v4.3 ***
   Hello World! 3r_tnh_sensor_lite/bl704l10q2i
   

Congratulations, you have 3r_tnh_sensor_lite configured and running Zephyr.