circuitpython: Feather S2 i2c issue - can't find board

I’ve got a Feather S2 and this sparkfun board: https://www.sparkfun.com/products/16294 . The sparkfun board is at address 0x60 vs the 0x67 that adafruit has for their MCP9600 CircuitPython library.

So I wrote this code:

import time
import board
import busio
import adafruit_mcp9600
# frequency must be set for the MCP9600 to function.
# If you experience I/O errors, try changing the frequency.
i2c = busio.I2C(board.SCL, board.SDA, frequency=100000)
mcp = adafruit_mcp9600.MCP9600(i2c, address=0x60)  # sparkfun default address is 60
while True:
    print((mcp.ambient_temperature, mcp.temperature, mcp.delta_temperature))
    time.sleep(1)

I get this error:

File “adafruit_bus_device/i2c_device.py”, line 102, in write OSError: [Errno 19] Unsupported operation

Then, after hitting control-D in the Mu REPL it just tells me there isn’t an I2C device at 0x60.

Someone in the Adafruit Discord mentioned running this code:

"""CircuitPython Essentials I2C Scan example"""
# If you run this and it seems to hang, try manually unlocking
# your I2C bus from the REPL with
#  >>> import board
#  >>> board.I2C().unlock()

import time
import board

i2c = board.I2C()

while not i2c.try_lock():
    pass

try:
    while True:
        print("I2C addresses found:", [hex(device_address)
              for device_address in i2c.scan()])
        time.sleep(2)

finally:  # unlock the i2c bus when ctrl-c'ing out of the loop
    i2c.unlock()

When I did that, it showed up once and then it stopped discovering the board.

On the Feather S2 I tried both with Circuit Python 6.0.1 and 6.1.0-beta2.

So, here are some steps I did to isolate the Feather S2:

• I tried different Stemma QT cables
• I tried the Adafruit AHT20 and that DID work with the Feather S2
• But for the sparkfun board that’s giving me issues, I tried it with a QT Py and that worked perfectly, It worked both with my original code and with the I2C scan Adafruit code.

So, in conclusion:

• The Sparkfun board works with the QT Py (Circuit Python 6.0.0).
• The Sparkfun board does not work with the Feather S2 neither with Circuit Python 6.0.1 nor Circuit Python 6.1.0-beta 2
• The Feather S2 isn’t completely broken for I2C as it works with the AHT20 - or at least it pases the I2C scan for the AHT 20.

Thanks!