PIco explorer & DS18B20

Support
1

Hello, I would plug a DS18B20 probe on pico explorer ? Can I use GP 2 direct acces given by pico explorer as 1 wire line of Pico Pi ?

2

Should be OK as it is not used by the screen.

3

I concur, it looks like it just goes to the header. A male jumper will bring it over to the solderless breadboard. Or just connect right to the header.

4

This works for me.:

import machine, onewire, ds18x20, time

ds_pin = machine.Pin(1)
ds_sensor = ds18x20.DS18X20(onewire.OneWire(ds_pin))

roms = ds_sensor.scan()
print('Found DS devices: ', roms)

while True:
  ds_sensor.convert_temp()
  time.sleep_ms(750)
  for rom in roms:
    print(rom)
    print(ds_sensor.read_temp(rom))
  time.sleep(5)

Found DS devices: [bytearray(b’(\x10\xc3y\xa2\x00\x03I’)]
bytearray(b’(\x10\xc3y\xa2\x00\x03I’)
16.625
bytearray(b’(\x10\xc3y\xa2\x00\x03I’)
16.75
bytearray(b’(\x10\xc3y\xa2\x00\x03I’)
16.8125

5

Thanks for answers. In code “machine.Pin(1)”, is it GP0 which is used ?

6

GP1 - second one down on the left if the USB is at the top and the printed Raspberry the right way up.