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unreadable serial console output from nanopi m4v2

Moderators: chensy, FATechsupport

Hi All,
I newly purchased a nanopi m4v2. I used the pre-build image from wiki, rk3399-sd-buildroot-linux-4.4-arm64-20201226.img. However, the serial console output from UART2 was unreadable.
My serial configuration:
+-----------------------------------------------------------------------+
| A - Serial Device : /dev/ttyUSB1 |
| B - Lockfile Location : /var/lock |
| C - Callin Program : |
| D - Callout Program : |
| E - Bps/Par/Bits : 115200 8N1 |
| F - Hardware Flow Control : No |
| G - Software Flow Control : No |
| |
| Change which setting? |
+-----------------------------------------------------------------------+
Does anyone know what is wrong with my serial setup?
I use picocom just fine:

Code: Select all

sudo picocom --baud 1500000 /dev/ttyUSB0
The baud rate is very high at 1,500,000 bps. Putty works.

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