4 Uarts and 2 Ethernet possiblities

[Millim]

Thank you, Is one UART design followed due to Raspberry PI compatible pins? 
As many RPI2 styled interfaces provides 1 or 2 UARTs.

Non necessarily ... There is a second UART, the UART4 available on pins 19/21, but it is shared with SPI pins.
It is better to use those SPI pins for attaching the SC16IS752 chips ...

Hi, I just obtained my first Rock64, may i know how to enable SPI pin with SC16IS752 step by step in Linux?
TQ

[martinayotte]

You will need to compile your own kernel since most of them don't provide SC16IS752.
You will also need to add device tree SC16IS752 node inside SPI node.

[giuseppe]

2. 2 ethernet(s) [100 Mbps is fine], one natively available, what is the best option to add second one?

Concerning a second NIC, I use a USB 3 Gigabit Ethernet adapter, it works quite well. To configure it, one needs to add a yaml file in /etc/netplan (in ubuntu)
LMM.

Hi LMM, sorry to resume an old post  What adapter do you use? I want to buy one for my Rock64 but I don't know if every USB3 to Ethernet adapter is the same or only some work with Rock64 (with Armbian in my case). Many thanks!

[LMM]

2. 2 ethernet(s) [100 Mbps is fine], one natively available, what is the best option to add second one?

Concerning a second NIC, I use a USB 3 Gigabit Ethernet adapter, it works quite well. To configure it, one needs to add a yaml file in /etc/netplan (in ubuntu)
LMM.

Hi LMM, sorry to resume an old post  What adapter do you use? I want to buy one for my Rock64 but I don't know if every USB3 to Ethernet adapter is the same or only some work with Rock64 (with Armbian in my case). Many thanks!

Hi, I suppose that all are compatible. I use this one (french amazon - german store) :
https://www.amazon.fr/CSL-Adaptateur-Gig...B074TSY3BC

LMM.