SI7013EVB-UDP-M3L1 Datasheet, PDF (14/26 Pages) Silicon Laboratories – Si7013EVB-UDP-M3L1 Users Guide

Si7013EVB-UDP-M3L1
Figure 9. Si70xx Data Logger Setup Wizard
4.7.2. Using the Data Logger
When running the Data Logger firmware for the first time, the firmware takes a sample every two minutes but does
not store the samples in the log. To start storing samples, press the S3 button. Each sample includes temperature,
humidity, and a time stamp. The firmware’s clock has not yet been set; so, time stamps begin at midnight January
first 2000. You may use the Data Logger application to display the stored samples. The application can also set the
firmware’s clock and adjust the time between samples.
The typical procedure for using the Data Logger is as follows:
1. Connect the MCU card to the PC with a USB cable.
2. Use the Data Logger application to stop logging and erase the log.
3. Set the time and the desired sample interval.
4. Ensure the MCU card is set up to use the onboard battery (refer to the UDP SiM3L1xx user's guide).
5. Disconnect the MCU card from the PC and take it to the location where you want to take samples.
6. Press the S3 button on the MCU card to start logging.
7. Wait while samples are logged.
8. Press the S3 button on the MCU card to stop logging.
9. Take the MCU card back to the PC and reconnect it to the PC.
10. Use the Data Logger application to display the log data.
11. Save the log data to a file.
The Data Logger firmware can generate alarms when the temperature or humidity gets too high or too low. When
an alarm occurs, the Data Logger firmware displays a flashing message on the LCD and pulses an output pin. If a
buzzer is connected to the output pin, an audible alarm is produced. The Data Logger application can configure the
thresholds for the alarms.
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