In DE10-NANO, can we add more UART interface on Arduino Headers?

Hi, First of all, welcome to FPGA & SoC world. Yes you can have mutli TX/RX on the PIO pins for sure. But the question here; are you going to do it using FPGA HDL only, NIOS II or embedded SoC. If you are new in FPGA I recommend you to use the NIOS II (Platform designer) which will give you the required application. Here you can search for design examples : https://fpgacloud.intel.com/devstore/platform/?acds_version=any Here is the references for you to use NIOS II : https://www.intel.com/content/dam/www/programmable/us/en/pdfs/literature/ug/ug_embedded_ip.pdf https://www.intel.com/content/dam/www/programmable/us/en/pdfs/literature/hb/nios2/n2sw_nii52016.pdf Useful vedios by Intel: https://www.youtube.com/watch?v=WGteIQqNfvY https://www.youtube.com/watch?v=o-K8VBa0Uk8 https://www.youtube.com/watch?v=lG2I56NKLQk Regards,