According to https://www.pjrc.com/teensy/td_uart.html pins 24 and 25 can be Serial1.
But https://www.pjrc.com/teensy/teensyLC.html#pinout does not show pins 24 and 25. I do see a pin 26.
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But https://www.pjrc.com/teensy/teensyLC.html#pinout does not show pins 24 and 25. I do see a pin 26.
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