In some use cases of NeoSWSerial, the RX pin might be "disconnected/open drain" for some reason or another. In such a case, RX pin can switch on and off randomly therefore causing random pieces of data to be received. The solution I propose is simple: set mode of RX pin as INPUT_PULLUP instead of just INPUT so that whenever this pin becomes open drain, the state of this pin will be interpreted as idle (not receiving any data).
In some use cases of NeoSWSerial, the RX pin might be "disconnected/open drain" for some reason or another. In such a case, RX pin can switch on and off randomly therefore causing random pieces of data to be received. The solution I propose is simple: set mode of RX pin as
INPUT_PULLUPinstead of justINPUTso that whenever this pin becomes open drain, the state of this pin will be interpreted as idle (not receiving any data).