Dedicated GPIO pins
Strato Pi uses some of the Raspberry Pi’s GPIO pins. These pins should not be used for
other functions.
GPIO pin
Direction
Description
GPIO2/SDA
I
2
C SDA line for the real time clock
GPIO3/SCL
I
2
C SCL line for the real time clock
GPIO14/TXD
out
serial TX line
GPIO15/RXD
in
serial RX line
GPIO5
out
cycle high/low for watchdog heartbeat
GPIO6
out
set to high to enable the watchdog
GPIO12
in
high on watchdog timeout
GPIO16
out
set to high to enable the shutdown cycle
GPIO20
out
set to high to sound the buzzer
GPIO13
out
soft serial TX for Strato MCU configuration
GPIO19
in
soft serial RX for Strato MCU configuration
15
Strato Pi Base User Guide