![]() ![]() Settings, checked by stty, are the same for all /dev/ttyS0,1,2 serial ports. We used a standard image provided by and an image we built from the latest OpenWRT sources, results are the same - serial ports don't work. We tried to join Tx and Rx of both UART1 and UART2 and get an echo by using, I guess, a standard way to check a serial port on Linux ( cat /dev/ttyS1 & echo wassup > /dev/ttyS1), but nothing happened (we see no output). Debug console mapped to an UART2 ( /dev/ttyS2) works fine, but other ports ( /dev/ttyS0, /dev/ttyS1) do not. We work with a LinkIt Smart 7688 development board (based on an MT7688 SoC) powered by OpenWRT and faced issues with accessing serial ports from Linux.
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