ADC reading incorrectly when others are created in RP2 port #6833
Description
In the below code, whether or not you created ADC3 affects the reading of ADC4. With the line commented out, I get a reading of about 17 degrees. With it there I get a reading of about 80.
import machine
import time
sensor_temp = machine.ADC(4)
blah = machine.ADC(3) # comment or uncomment this line to trigger / untrigger
conversion_factor = 3.3 / 65535
min_temp = 0
max_temp = 30
while True:
reading = sensor_temp.read_u16() * conversion_factor
temperature = 27 - (reading - 0.706)/0.001721
print(temperature)
time.sleep(0.5)