How to wake up the lopy with the accelerometer

[CeylordZ]

@railmonitor And is it possible to store the data from the accelerator when it wake up ? Or I have to keep it awake if I want to measure the acceleration ?

I want to know how strong is the acceleration when it wake up the board (2g, 4g or 8g for example...).

[CeylordZ]

@railmonitor that's what I looked for, thank you !

[railmonitor]

Yes, that is definitly possible. Have a look a the following code, it is written for FiPy with Pysense board, so there might be some differences regarding libraries / pins but should work when corrected:

from pysense import Pysense
from LIS2HH12 import LIS2HH12
import pycom
import time
import machine

py = Pysense()                  #Create Pysense object
acc = LIS2HH12()                #Create accelerometer object

if pycom.heartbeat() == True:   #turn off blinking LED
    pycom.heartbeat(False)

wakeup_reason = machine.wake_reason()

#Enable interrupts from accelerometer (P13) and button (P14)
machine.pin_sleep_wakeup(['P13'], mode=machine.WAKEUP_ANY_HIGH, enable_pull = False)
machine.pin_sleep_wakeup(['P14'], mode=machine.WAKEUP_ALL_LOW, enable_pull = False)

# set the acceleration threshold to 2000mG (2G) and the min duration to 200ms
acc.enable_activity_interrupt(2000, 160)

if(wakeup_reason == machine.PIN_WAKE):
    pycom.rgbled(0xffff00)  #yellow
    time.sleep(2)

print("Turning on Red LED for 2 sec")
pycom.rgbled(0xff0000)      #red
time.sleep(2)

print("Enter lightsleep mode for 5 sec")
machine.sleep(5000)         #Value in ms

print("Pysense Wakeup reason is " + str(wakeup_reason))

if acc.activity():
    pycom.rgbled(0x800080)  #purple
else:
    pycom.rgbled(0x0000ff)  #blue