Am Dienstag, den 26.05.2020, 17:19 +0000 schrieb Joakim Tjernlund: > > > This "u-boot SPL" is the first thing u-boot writes and somehow this is remembered, I assume, by cdc_acm > and gets echoed back when I open ttyACM0 Hi, that makes sense, but it is not something that we could really change in CDC-ACM, I am afraid. Regards Oliver