Problems with HWFC

[Igor]

Let's send a string over UART. RTS signal will go low (active). So far, so good.

The problem is that RTS remains active even after sending is done. And because it is still active, receiving does not work. So, how is it supposed to work?

There are countless HWFC related threads on the forum, but I am unable to find a solution. It seems like there is a real problem with HWFC implementation.

[nRF52840, nRF SDK 15.2, Mesh SDK 2.2, SD140 6.1]

[Einar Thorsrud]

Hi,

The nRF use the "modern" RTS/CTS scheme, where RTS is normally always asserted when the nRF is able to receive data. You can refer to for instance this post or the RTS, CTS, and RTR section in the RS-232 Wikipedia article.