@ajb2k3 Ok thanks.

FYI and anyone else that would like to get the ENV III data on CoreS3, I managed to get it working using I2C directly.

Here is the code to go in your loop assuming I2C has been initialised as the default i2c0 variable:

i2c0.writeto(68, '\x2C\x06', True)
time.sleep_ms(100)
data = i2c0.readfrom(68, 6, True)

temp = (((data[0] << 8 | data[1]) * 175) / 0xFFFF) - 45
hum = (((data[3] << 8 | data[4]) * 100.0) / 0xFFFF)

I then output this Temperature (C) and Humidity (%) formatted using (assuming you've initialised label fields already):

label_t.setText(f'{temp:#.1f}C ')
label_h.setText(f'{hum:#.0f}%')

@ajb2k3 Ok thanks.

FYI and anyone else that would like to get the ENV III data on CoreS3, I managed to get it working using I2C directly.

Here is the code to go in your loop assuming I2C has been initialised as the default i2c0 variable:

i2c0.writeto(68, '\x2C\x06', True)
time.sleep_ms(100)
data = i2c0.readfrom(68, 6, True)

temp = (((data[0] << 8 | data[1]) * 175) / 0xFFFF) - 45
hum = (((data[3] << 8 | data[4]) * 100.0) / 0xFFFF)

I then output this Temperature (C) and Humidity (%) formatted using (assuming you've initialised label fields already):

label_t.setText(f'{temp:#.1f}C ')
label_h.setText(f'{hum:#.0f}%')

@ajb2k3: His issue is that it hangs on the init so it never gets to the loop section, I have exactly the same issue.

@stefan-h: Did you manage to resolve this issue or is it still broken for you? I'm keen to solve my issue too!

I have exactly the same issue. The ENV call from the unit library to initialise it causes the reboot:

env3_0 = ENV(i2c=i2c0, type=3)

I can remove that, then do a scan on i2c0 and fetch the addresses of the sensors: [68, 112]

I can then interface with I2C directly to read from the correct address and pull data from the buffer. That proves the ENV3 is connected correctly and that I2C isn't broken.

It looks like a library issue for ENV3 I guess?

I've also tried sending a command on I2C to the sensor to initiate a temperature measurement (writing 0x2C06) however I must be doing something wrong there as it then fails to allow me to read from the device any more and I have to hard reset it before I can continue.