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--- gpio_control_from_command_line [2017/01/22 13:58] – walkeradmin
+++ gpio_control_from_command_line [2023/03/09 22:35] (current) – external edit 127.0.0.1
@@ Line 47: / Line 47: @@
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-    gpio -readall
+    gpio readall
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 This will give an output similar to below (This output is from a Pi Zero v1.3)
@@ Line 81: / Line 81: @@
 </file>
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+It can be seen that this Pi has GPIO set to OUT and some to IN. I am using the Pi as a clock, so these are the lines going to my LED display.
+\\
+\\
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 ==== Using gpio command ====
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+Before looking at the commands, there is a switch I want to talk about, this is <color red>-g</color>. If you use the -g switch you are operating on BCM numbers, not PIN numbers. I always use BCM numbers, but some people prefer pin numbers.
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+To set the function of the GPIO pin, use <color red>gpio -g mode</color>
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+\\
+    using BCM number
+    gpio -g mode 18 out - Sets GPIO18 to OUTput mode (GPIO18 is physical pin 12)
+    using pin instead of bcm
+    gpio mode 12 out - Sets GPIO18 to OUTput mode (GPIO18 is physical pin 12)
+    Modes are In, Out, PWM, Up, Down and Tri.
+\\
+\\
+Set GPIO pin to 1 or 0
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+\\
+    gpio -g write 18 0 - sets GPIO18 to a zero.
+    gpio -g write 18 1 - sets GPIO18 to a one.
+\\
+\\
+----