Updates examples

[jposada202020]

New example is desired to show the user how to add two or more sensors

[caternuson]

These are sensors that use BusDevice?

[jposada202020]

Yes indeed.

[caternuson]

The current simpletest example shows this for two TSL2591s.

[jposada202020]

Thanks closing this then 👍🏼

[caternuson]

We could still update the example offerings though. Maybe something like this?

• rename current tca9548a_simpletest.py to multi_sensor.py and that become the example for that
• add a new tca9548a_simpletest.py which could be an i2c scan sweep example
• any other use cases that are confusing and an example would help clarify?

[jposada202020]

Oh yes I love the idea, will work on that :)

[caternuson]

OK, reopened and renamed. I think there was a good scan example in that other issue thread?

[jposada202020]

yes there is, I did example for the fakerequests, i was thinking something similar
https://github.com/adafruit/Adafruit_CircuitPython_FakeRequests/blob/main/examples/fakerequests_advancedtest.py
what do you think?

[caternuson]

Even simpler, something like:

import board
import adafruit_tca9548a

tca = adafruit_tca9548a.TCA9548A(board.I2C())

for channel in range(8): 
    if tca[channel].try_lock():
        print('Channel {}:'.format(channel), end='')
        tca[channel].scan()
        tca[channel].unlock()

Weird - I thought I had dumped something like that over in that PR #32 thread, but not seeing it now. Oh well. Easy enough to rewrite. Output would look something like:

Channel 0:[112]
Channel 1:[38, 56, 112]
Channel 2:[112]
Channel 3:[112]
Channel 4:[112]
Channel 5:[94, 112, 119]
Channel 6:[112]
Channel 7:[112]

Could maybe make it a little fancier and do a list comp on the return to filter out the TCA's address.

[jposada202020]

Will do

[jerryneedell]

Can you please output the addresses in Hex?

[jposada202020]

yes:) we like hex in the I2C world :)

[caternuson]

import board
import adafruit_tca9548a

i2c = board.I2C()

tca = adafruit_tca9548a.TCA9548A(i2c)

for channel in range(8): 
    if tca[channel].try_lock():
        print('Channel {}:'.format(channel), end='')
        addresses = tca[channel].scan()
        print([hex(address) for address in addresses if address != 0x70]) 
        tca[channel].unlock()

Channel 0:[]
Channel 1:['0x26', '0x38']
Channel 2:[]
Channel 3:[]
Channel 4:[]
Channel 5:['0x5e', '0x77']
Channel 6:[]
Channel 7:[]