ValueError: Incorrect family code in device address.

[robmarkcole]

Attempting to use the DS18X20 with Metro M4 Airlift Lite with circuitpython 5.0.0-beta.0 with the ds18x20_simpletest.py example. I hit this error, so am now setting a large _maximum_devices. However I now hit a different error - ValueError: Incorrect family code in device address.

>>> import time
>>> import board
>>> from adafruit_onewire.bus import OneWireBus
>>> from adafruit_ds18x20 import DS18X20
>>> ow_bus = OneWireBus(board.D5)
>>> ow_bus.maximum_devices(200)
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
TypeError: 'int' object is not callable
>>> ow_bus._maximum_devices = 200
>>> ds18 = DS18X20(ow_bus, ow_bus.scan()[0])
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "adafruit_onewire/bus.py", line 156, in scan
RuntimeError: Maximum device count of 200 exceeded.
>>> ow_bus._maximum_devices = 2000
>>> ds18 = DS18X20(ow_bus, ow_bus.scan()[0])
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "adafruit_ds18x20.py", line 56, in __init__
ValueError: Incorrect family code in device address.

[ladyada]

which exact device?

[robmarkcole]

18B20

[ladyada]

please show an entire wiring diagram including pullup resistor

[robmarkcole]

With pull up resistor no errors, all working. This is my fault for not reading the docs, so sorry! Put my writeup on https://github.com/robmarkcole/circuitpython-projects/tree/master/1-wire%20temperature

[ladyada]

all good, we'll add a warning : )

[dhalbert]

Fixed by #15.