JKain

The Teensy specific stuff now lives in the HardwareSerialIMXRT class, so try using that instead of regular HardwareSerial.

This is a known issue with 1.59. Using HardwareSerialIMXRT is indeed an effective workaround.

OK, I figured it out. Posting here for anyone else who has a similar issue. In the variable declarations, I replaced the line: HardwareSerial* ESCCMD_serial[ESCCMD_NB_UART] = { with: HardwareSerialIMXRT* ESCCMD_serial[ESCCMD_NB_UART] = {...

I appreciate the help, but I'm new here, and I can't figure out exactly how to do that. How do I do this?

Thanks. So, do I just put that as an include at the beginning?

I'm writing (or, rather, copying from other people) some code for a Teensy 4.0/4.1, using PlatformIO. Some known to be good code contains the following line: ESCCMD_serial->clear( ); When I build it, I get the following error: error: 'class...