raspberrypilearning/explorer-hat-cheat-sheet

Quick cheat sheet for the ExplorerHAT Pro

ExplorerHAT Cheatsheet

Simple Outputs

Wiring

Code

import explorerhat
from time import sleep
explorerhat.output.one.on()
sleep(3)
explorerhat.output.one.off()

Additionally the following methods are supported

toggle()	Changes the output to its opposite state
blink( on_time, off_time )	Turns the output on for “on_time” and then off for “off_time”
pulse( fade_in_time, fade_out_time, on_time, off_time )	Same as blink, but lets you fade between on and off
fade( from, to, time )	Fade from 0-100 to 0-100 brightness over a number of seconds specified by “time”
stop()	Stops any running blink, fade or pulse action

Simple Inputs

Wiring

Code

Reading the value of an input

import explorerhat
print(explorerhat.input.on.read())

Calling a handler functionn

import explorerhat

def push(input):
    state = input.read()
    if state == 1:
        print('You pushed me')
    else:
        print('You released me')

explorerhat.input.one.changed(push)

or alternatively:

import explorerhat

def pushed(input):
    print('You pushed me')

def released(input):
    print('You released me')

explorerhat.input.one.on_high(pushed)
explorerhat.input.one.on_low(released)

PIR

Wiring

PIR	ExplorerHAT
VCC	5V
OUT	INPUT #
GND	GND

Code

Reading the value of the PIR

import explorerhat
print(explorerhat.input.on.read())

Calling a handler function

import explorerhat

def moving(input):
    state = input.read()
    if state == 1:
        print('MOVING')
    else:
        print('NOT MOVING')

explorerhat.input.one.changed(moving)

Analog Inputs

Wiring

Code

import explorerhat

print(explorerhat.analog.one.read())

or detect a change, for example in the code below this is looking for a change of only 0.01mV

import explorerhat

def light(channel, event):
    print('Light changed')
    
explorerhat.analog.one.changed(light,0.01)

Motor

Wiring

Code

import explorerhat
from time import sleep

explorerhat.motor.one.forward(100)
sleep(3)
explorerhat.motor.one.backward(100)
sleep(3)