Simple SWR meter with I2C LCD screen.
he variant assembled from the modules looks like this https:/UN7FGO/SWR_Meter_LCD_I2C/blob/master/s_swr_03.jpg .
A detailed description can be found on my website http://un7fgo.gengen.ru/?p=1814 (in Russian).
Options for electrical circuits and printed circuit boards of a self-contained device can be found in the ЕasyEDA catalog.