Demo code to read and display temperature and humidity data from Sensirion SHTC3 using the MSP430F5529 or MSP430FR5969 Launchpad. Low-level I2C communication using UCB0 registers, interrupts, and low-power modes. Read sensor in low-power mode with clock stretching. Display data on terminal program. Humidity displayed with 4 significant figures; temperature 3 significant figures. Main loop runs with timed interrupt from LPM3 and VLO clock. I2C clock 100 kHz; UART 9600 baud. IDE with CCS 6.1.3 and nofloat printf support.
SHTC3_F.c Code for MSP430Fx5xx/x6xx MCUs. Launchpad terminals:
P3.0 SDA with 10k pullup
P3.1 SCL with 10k pullup
P3.3 UART TXD
P3.4 UART RXD
SHTC3_FR.c Code for MSP430FR59xx MCUs. Launchpad terminals:
P1.6 UCB0SDA with 10k pullup
P1.7 UCB0SCL with 10k pullup
P2.5 UCA1TXD
P2.6 UCA1RXD
Sensirion product page: https://www.sensirion.com/shtc3
Digi-Key video: https://www.youtube.com/watch?v=X7GWMmYFZ9I
