Hardware User Guide
3.7 On Board Sensors
On the
EMB-LR1276S Dev Board
there are two sensors (Figure 18):
•
Digital Temperature Sensor (
LM75A
by Texas Instruments)[3]
•
Light Sensor (
Si1141-A11
by Silicon Labs) [4]
Both sensors use the I2C bus and they are connected to A5 (SDA) and A6 (SCL)
pins of the
EMB-LR1276S
module.
SERCOM-2 is used to communicate with the sensors.
3.8 User Button
The User Button (Figure 19) is connected to one GPIO that can handle
interrupts. By pushing the button the corresponding line is grounded.
Button
Signal
EMB-LR1276S
Pin
Type
User Button
PB23
C5
Input
EMB-LR1276S Dev Board User Guide – Rev. 2.1
Page 14 of 20
Figure 18. Light and temperature sensors.
Figure 19. User button.
