[NUCLEO-WBA52CG STM32 wireless product family new series] +2, hardware i2c driver temperature and humidity sensor SHT40

dql2016

[NUCLEO-WBA52CG STM32 wireless product family new series] +2, hardware i2c driver temperature and humidity sensor SHT40 [Copy link]

I have a Grove SHT40 sensor module, as shown in the figure below. I use it to learn how to use the STM32WBA52CG hardware I2C.

SHT40 is a digital temperature and humidity sensor with an accuracy of up to ±1.8% / max. ±3.5% RH. The main parameters are as follows:

humidity
Typical relative humidity accuracy		1.8	%RH
Operating relative humidity range		0 - 100	%RH
Response time (τ63%)		4	s
Calibration Certificate		Factory Calibration

temperature
Typical temperature accuracy		0.2	°C
Operating temperature range		-40 - 125	°C
Response time (τ63%)		2	s

Normal
Supply voltage		1.08 - 3.6	V
Average supply current		0.4	uA
interface		IC
Dimensions (L x W x H)		1.5 x 1.5 x 0.5	mm
Packing size		2500, 10000	pcs (T&R)

Official information

https://sensirion.com/cn/products/product-catalog/SHT40/

The official driver reference download is provided

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First, use Stm32cubemx to create a project based on the development board. The advantage of creating a project based on the development board is that the onboard peripherals such as LEDs and buttons are initialized and configured for you:

Open the serial port configuration to facilitate printing logs:

Turn on the hardware I2C. The parameter settings are very simple. You can just use the default ones:

After configuration, generate the project.

Next, refer to the schematic diagram to determine the location of the I2C1 pin:

Connect the lines:

Unzip the driver package downloaded from the official website of Sensirion, and then copy the corresponding files to the project directory of stm32:

Copy the reference driver and replace it:

Create a new group in keil and add these files:

Remove the initialization in the driver abstraction layer, because stm32cubemx has already generated the i2c driver:

The main function calls the test code:

Add printf printing support to the serial port driver:

Final result:

Attach the source package:

stm32wba_test.rar (5.11 MB, downloads: 21)

2023-7-30 22:03 上传

点击文件名下载附件

dql2016

There is a bug at present. After regenerating the Keil project with stm32cubemx, the grouping I added was deleted. . . I didn't have this problem when playing with other stm32 chips before.

lugl4313820

This post is really wonderful, thanks for sharing. This SHT40 must be very expensive!

dql2016

lugl4313820 published on 2023-8-1 06:46 This post is really wonderful. Thanks for sharing. This SHT40 is expensive!

A few dozen yuan, a bit expensive

xiaolinxiang699

Awesome! Awesome! @@@@! ! ! !