Solve timing issue using Chipdrive Micro 120 V4.30 (buffered RS232) and Jameica/Hibiscus with recent Ubuntu 18.04 - #2
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For me, communication need delay on write while mirgrating from Ubunutu 14.04-HWE to Ubuntu 18.04 or HBCI card will not be detected.
Setting delay to 1ms solve the issue for me. I modify IO_Serial_Write() to send the whole buffer at one instead of one-by-one resulting in a one-time delay.