Pin 38 Hardwareserial Softwareserial RX TX — ELECROW - FORUM https://forum.elecrow.com/index.php?p=/ Fri, 29 May 2026 15:10:22 +0000 en Pin 38 Hardwareserial Softwareserial RX TX — ELECROW - FORUM 7" Display Serial RX on PIN38 does not work https://forum.elecrow.com/index.php?p=/discussion/1080/7-display-serial-rx-on-pin38-does-not-work Tue, 04 Feb 2025 09:02:21 +0000 Elecrow HMI Display SM0PYH 1080@/index.php?p=/discussions "Hello, I am using pin 38 to read serial communication. Often it works for a few bytes, then pin 38 goes low. It remains low even though I send 3.3V 20mA to it. After a reset, it sometimes works again. I have tested with both hardware serial1 and software serial."

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