I am working on a core 2 v1 module with a NCIR and a heart rate module connected by a grove hub and they both work perfectly fine individually (when only one is plugged in and when they are both plugged in) : whatever the first one I select, it works perfectly but when I want to switch from getting data from the heart rate module to the NCIR module, (or NCIR to heart rate), everything freezes.

Here is my code if it helps:

rom m5stack import *
from m5stack_ui import *
from m5ui import *
from uiflow import *
import time
import wifiCfg
import urequests
import unit

INITIATE

screen = M5Screen()
screen.clean_screen()
screen.set_screen_bg_color(0xFFFFFF)
ncir2 = unit.get(unit.NCIR, unit.PORTA)
heart = unit.get(unit.HEART, unit.PORTA)

heart.setLedCurrent(0x04, 0x01)
heart.setMode(0x03) # HR & SpO2

set_record = 0
wifiCfg.autoConnect(lcdShow=False)

LABELS

instructions1 = M5Label('Posez votre index gauche sur le capteur', x=15, y=10, color=0xbc0c21, font=FONT_MONT_14, parent=None) # y+15 between lines

HeartRate = M5Label('Heart', x=15, y=114, color=0x509ed3, font=FONT_MONT_30, parent=None)
sp = M5Label('SpO2', x=129, y=114, color=0x509ed3, font=FONT_MONT_30, parent=None)
temperature_label = M5Label('Temp', x=229, y=114, color=0x509ed3, font=FONT_MONT_30, parent=None)

IMAGES

image_oxy = M5Img("res/oximeter.png", x=133, y=46, parent=None)
image_pulse = M5Img("res/pulse.png", x=20, y=46, parent=None)
image_thermo = M5Img("res/thermometer.png", x=238, y=46, parent=None)

radius = 20

green 0x33b151

red 0xb10707

button_cardiac = M5Btn(text='O', x=120, y=200, w=radius, h=radius, bg_c=0xb10707, text_c=0xFFFFFF, font=FONT_MONT_14, parent=None)
button_temp = M5Btn(text='O', x=170, y=200, w=radius, h=radius, bg_c=0xb10707, text_c=0xFFFFFF, font=FONT_MONT_14, parent=None)

def button_cardiac_pressed():
global set_record
button_cardiac = M5Btn(text='I', x=120, y=200, w=radius, h=radius, bg_c=0x33b151, text_c=0xFFFFFF, font=FONT_MONT_14, parent=None)
button_temp = M5Btn(text='O', x=170, y=200, w=radius, h=radius, bg_c=0xb10707, text_c=0xFFFFFF, font=FONT_MONT_14, parent=None)
set_record = 1
pass

button_cardiac.pressed(button_cardiac_pressed)

def button_temp_pressed():
global set_record
button_cardiac = M5Btn(text='O', x=120, y=200, w=radius, h=radius, bg_c=0xb10707, text_c=0xFFFFFF, font=FONT_MONT_14, parent=None)
button_temp = M5Btn(text='I', x=170, y=200, w=radius, h=radius, bg_c=0x33b151, text_c=0xFFFFFF, font=FONT_MONT_14, parent=None)
set_record = 2
pass

button_temp.pressed(button_temp_pressed)

while True:

button_temp.pressed(button_temp_pressed)
button_cardiac.pressed(button_cardiac_pressed)

if set_record == 1:
    # HR
    hr = int(heart.getHeartRate()/3)
    HeartRate.set_text(str(hr))
    label_heart_value = M5Label('bpm', x=70,  y=125, color=0x509ed3, font=FONT_MONT_14, parent=None)

    # O2 SAT
    delta = 5
    spo2 = heart.getSpO2()+delta
    if spo2 > 100:
        spo2 = 100
    elif spo2 == delta:
        spo2 = 0
    
    sp.set_text(str(spo2))
    label_spo2_value  = M5Label('%', x=180, y=120, color=0x509ed3, font=FONT_MONT_14, parent=None)
    wait(1)
    pass
 
elif set_record == 2:
    temperature = ncir2.temperature
    wait(0.2)
    temperature_label.set_text(str(temperature))
    label_temp_value  = M5Label('°C',  x=300, y=125, color=0x509ed3, font=FONT_MONT_14, parent=None)
    wait(1)
    pass

Thank you so much for your help!