SLAU739 October 2017
The out-of-box (OOB) demo for the MSP-EXP430FR2433 LaunchPad development kit demonstrates how to setup a periodic temperature data logger, by using a ring buffer inside the FRAM memory of the MSP430FR2433 MCU. Alternatively, the demo also implements a real-time temperature sensor.
Both the logged and the real-time temperature data can be transmitted to the PC and visualized using the accompanying cloud GUI (visit MSP-EXP430FR2433 OOB GUI). If access to the cloud GUI is not available, the data can still be observed using any serial terminal application (application UART settings: 115200, 8, 1, n).
By default after power up, the LaunchPad development kit enters the FRAM Data Log mode. The red LED1 blinks periodically (approximately every 5 seconds), which indicates that the device is waking up to log the temperature and going back to sleep. Press the left user button S1 to transfer the stored temperature to the PC.
Next, try pressing the S1 and S2 buttons simultaneously to enter the Live Temperature mode. The LaunchPad development kit should start streaming live temperature data to the PC to be visualized in the MSP-EXP430FR2433 OOB GUI or displayed in a serial terminal. In this mode, the application also keeps track of a temperature threshold (the default is 25°C), and when a new temperature data is acquired, it is compared against that threshold. If the current temperature is above the threshold, the red LED1 illuminates, and if the current temperature is below the threshold, the green LED2 illuminates. Pressing S1 or S2 independently increases or decreases the temperature threshold in this mode.
The user can influence the temperature of the device by blowing hot or cold air and observing the changes in the user LED brightness or see data changes on the GUI.