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Is it possible to read more than one TTL sensor on serial RX GPIO 10? I know you can add multiple serial sensors on /dev/ttyUSBx

Does the same apply to /dev/ttyAMAx ?

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While I have not been able to find a way to read multiple TTL sensors on a single GPIO pin, I did find this way of using other GPIO pins as serial RX pins via the pigpio library. Works great.

http://abyz.me.uk/rpi/pigpio/python.html#bb_serial_read

And a link to simple python code for reading a given GPIO pin as serial:

https://www.rs-online.com/designspark/raspberry-pi-2nd-uart-a-k-a-bit-banging-a-k-a-software-serial

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