Orange pi one to uart debug orange pi 2g iot

perimas

Hi,
i try to use my orange pi one armbian to do uart debug on orange pi 2g iot. I use uart3 on orange pi one and my configuration

1. [uart0]
   
2. uart_used = 0
   
3. uart_port = 0
   
4. uart_type = 2
   
5. uart_tx = port:PA04<2><1><default><default>
   
6. uart_rx = port:PA05<2><1><default><default>
   
7. 
   
8. [uart1]
   
9. uart_used = 0
   
10. uart_port = 1
    
11. uart_type = 4
    
12. uart_tx = port:PG06<2><1><default><default>
    
13. uart_rx = port:PG07<2><1><default><default>
    
14. uart_rts = port:PG08<2><1><default><default>
    
15. uart_cts = port:PG09<2><1><default><default>
    
16. 
    
17. [uart2]
    
18. uart_used = 0
    
19. uart_port = 2
    
20. uart_type = 4
    
21. uart_tx = port:PA00<2><1><default><default>
    
22. uart_rx = port:PA01<2><1><default><default>
    
23. uart_rts = port:PA02<2><1><default><default>
    
24. uart_cts = port:PA03<2><1><default><default>
    
25. 
    
26. [uart3]
    
27. uart_used = 1
    
28. uart_port = 3
    
29. uart_type = 2
    
30. uart_tx = port:PA13<2><1><default><default>
    
31. uart_rx = port:PA14<2><1><default><default>
    
32. ;uart_rts = port:PA15<3><1><default><default>
    
33. ;uart_cts = port:PA16<3><1><default><default>

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I've connect tx PA13 on pi one to rx 2g iot and rx PA14 pi one to tx 2g iot
(when i connect ground, either pi one or 2g iot cannot boot)

I'm using putty (also try using picocom, kermit) on pi one

Serial /dev/ttyS3
baud 921600
also try 115200

The display on putty when 2g iot start cannot understand

am i missing something?