LoPy4 alarm callback not repeating periodically

[joshhulnz]

I have a LoPy4 which I am trying to measure an ADC voltage on periodically. I have an alarm that I am trying to trigger interrupts every five seconds with. Here is what the code I am testing with looks like:

from machine import ADC
from machine import Timer
import utime

adc = ADC(0)
#ADC channels for baterry voltage monitoring
adc_b1 = adc.channel(pin = 'P20', attn=ADC.ATTN_11DB)

list = []

#Measures battery voltage
def battery_voltage():
    for i in range(0, 35):
        read = adc_b1.voltage()
        list.insert(i, read)
    avg_reading_b1 = sum(list)/len(list)
    list.clear()

    bat_1 = str(round(avg_reading_b1/1000, 2)) #String and round
    print(bat_1)

battery_alarm = Timer.Alarm(battery_voltage(), s=5, periodic=True)

def main():
    while(1):
        continue

main()

The functions battery_voltage() gets called once after the file has been successfully uploaded. After that, the program continues to loop but battery_voltage() does not get called again. Is there something wrong with how I am setting up the alarm?

[robert-hh]

@joshhulnz
a) write: Timer.Alarm(battery_voltage, s=5, periodic=True) without the brackets.
Optimization:
b) in the main loop, I would use a short sleep instead of the continue statement
c) I you just need the average, you do not have to collect the values. Just add them up while reading, e.g.

def battery_voltage():
    avg = 0
    for i in range(0, 35):
        avg += adc_b1.voltage()
    print(round(avg/35000, 2))