odroid-uart-serial.txt (1184B) [raw]
1 Connecting to the Odroid HC4 via UART 2 ===================================== 3 Thu Dec 30 11:11:15 EST 2021 4 5 In the process of trying to flash OpenBSD on my Odroid HC4 (still 6 not achieved.. but the FAQ says the chip is supported...), I 7 needed to connect via the serial console. 8 9 The board has a UART Console with the following pins: 10 11 12 _____UART____ 13 |Pin 4 - GND| 14 |Pin 3 - RXD| 15 |Pin 2 - TXD| 16 |Pin 1 - VCC| 17 \___________| 18 19 CON5 20 3.3V LVTTL 21 22 -> Source: https://wiki.odroid.com/odroid-hc4/hardware/hardware 23 24 25 And I have a USB to Serial with the following wires (your colors 26 may vary!): 27 28 --red----[VCC] 29 --green--[RXD] 30 --white--[TXD] 31 --black--[GND] 32 33 To the best of my research, these stand for: 34 35 - VCC: power 36 - RXD: receive 37 - TXD: transmit 38 - GND: ground 39 40 I had success connecting _without the power_, hooking up only 41 GND, RXD, and TXD. 42 43 The connectors on my serial are a bit too large, too, so I had to 44 turn them diagonal so the squares would fit in the notches, but 45 it worked! 46 47 On OpenBSD (host OS), I was able to connect like so: 48 49 $ doas cu -l cuaU1 -s 115200 50 51 (cuaU1 is the serial USB device--not 0 on my machine since my 52 motherboard has its own serial out that takes up cuaU0).