temperature-humidity

Temperature/Humidity sensor example

• Target: IAR RISC-V GD32V Evaluation Board

This project exercises the SHT31 I2C Temperature/Humidity sensor.

Jumper settings

To run this example, make sure that the jumpers on the evaluation board are set to use the RGB LED. The settings are highlighted in the following tables:

J5	Position	Option
	1-2	LED3
	2-3	Green LED

J6	Position	Option
	1-2	USB/Debug
	2-3	J4

J8	Position	Option
	1-2	SW4
	2-3	Red LED

J9	Position	Option
	1-2	SW5
	3-4	Blue LED
	5-6	LED4

Notes

Depending on the room temperature and humidity, you may need to adjust the fixed-point threshold values in main.c to ensure proper crossing over all threshold levels. These values are scaled by a factor of 1000 (e.g., 25'C is represented as 25000).

If adjustments are required for the current room conditions:

• Update the temperature and humidity thresholds in main.c.
• Rebuild the project.
• Restart the debugging session.

The tables below show how threshold levels determine which LED is lit.

Temperature threshold	Set when data is	Board LED
Low	below TEMP_LOW_THRESHOLD	Blue LED
Medium	between TEMP_LOW_THRESHOLD and TEMP_MEDIUM_THRESHOLD	Green LED
High	above TEMP_MEDIUM_THRESHOLD	Red LED

Humidity threshold	Set when data is	Board LED
Low	below HUM_LOW_THRESHOLD	3
Medium	between HUM_LOW_THRESHOLD and HUM_MEDIUM_THRESHOLD	3 and 2
High	above HUM_MEDIUM_THRESHOLD	3, 2 and 1