I want to use a UART bus (RX-TX-GND) to communicate between one master and multiple slaves.
NUCLEO-F401RE board is the bus master. B-L072Z-LRWAN1 and ESP32 are the slaves.
Communication over UART works between master and one slave at a time. However, when I connect both slaves to the bus, communication stops working. Of course, I made sure that only one slave is sending at a time so I do not see where is the problem.
Can it be due to UART pullup resistor configuration? I have tried different configurations but nothing works for now.