I installed OpenWRT on the SD card and connected the UART as shown in the photo, but there’s no response in Tera Term. I also tried swapping the TX and RX ports, but it made no difference. Occasionally, when I touch the board by hand, some random characters appear, but it doesn’t seem like a proper connection. Also, on the LED board, both the red and green lights are on at the same time—is that normal? I have no idea what the problem is. I just bought this a few days ago and wanted to get started, but it’s already quite difficult…
Which uart adapter do you use? Ftdi is recommended profllic is known to have issues with bananapi boards.
PL2303 TA USB TTL RS232 변환 직렬 케이블 PL2303TA Win XP/VISTA/7/8/8.1과 호환 가능 pl2303hx보다 우수함 - AliExpress 502 this one PL2303 TA USB TTL RS232 i used…T.T
I have an additional question. Is it normal for both the red and green LEDs to turn on when the power is connected? In my case, both LEDs light up as soon as I power it on.
Only red is directly powered,but maybe green (gpio-led) is set by your system (openwrt?) in uboot…it is only a few seconds after powering on till uboot.