active_low

direction

power

uevent

device

edge

subsystem

value

Let’s set the “direction” of the port to output

echo out > direction

To confirm this, we will “cat” the value

cat direction

You should see the “out” in the command line. Now the device is configured

as an output. “value” is where the status of the pin is set, 1 for high, 0 for

low.

echo 1 > value

Testing with a multi-meter, small led, or oscilloscope, you should see a

“high” status (3.3V) present on gpio14.

Using the Pi Block as an input device

If you want the Pi Block to read switches, buttons, or other logic level

inputs, you must pay attention to pull-up and pull-down resistors. The level

converter on board is very weak. Here are two scenarios explained:

Connection Diagram for Active High Push Button

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