https://devzone.nordicsemi.com/f/nordic-q-a/42667/how-can-i-use-two-uart-interface-in-nrf51822-at-the-same-timeHi, I have a project which need to use two UART interface at the same time. As well known, there only have one hardware UART interface in nRF51822/nRF52832. If I want to create second UART interface, maybe I need use software method to simulateen-USTelligent Community 13Thu, 17 Jan 2019 14:05:15 GMThttps://devzone.nordicsemi.com/thread/166271?ContentTypeID=1Thu, 17 Jan 2019 14:05:15 GMT137ad170-7792-4731-bb38-c0d22fbe4515:569a5a70-2ca2-4c0b-b4c4-07fb45f30d7eawneil<p>Or a separate UART-to-SPI/i2C bridge chip.</p> <p>Do you need a full UART, or will just transmit do?</p> <p>I think the nRF528<span style="text-decoration:underline;"><strong>40</strong></span> has 2 UARTs ... ?</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/166268?ContentTypeID=1Thu, 17 Jan 2019 13:59:50 GMT137ad170-7792-4731-bb38-c0d22fbe4515:d7a2aeda-ee1b-44c7-a1a8-b6c264534349Simonr<p>Hi Chianglin</p> <p>Simulating a software UART will not work with our nRF5x chips. The SoftDevice does not allow for any accurate software simulations like UART. I suggest you look for an external RS232 multiplexor that is attached via SPI, I2C or similar.</p> <p>Best regards,</p> <p>Simon</p><div style="clear:both;"></div>