https://firmware-selector.openwrt.org/?version=24.10.0&target=mediatek%2Ffilogic&id=bananapi_bpi-r4 I use this firmware and find there are ttyS0, ttyS1, etc. Are these mapped to UART1 and UART2? I want to use UART to communicate with a Bluetooth module. Do you have any suggestions?
Also I tried using FT232 but the dmesg shows
[ 8423.388075] usb 1-1.4: USB disconnect, device number 7
[ 8428.342404] usb 1-1.4: new full-speed USB device number 8 using xhci-mtk
[15235.292167] usb 1-1.4: USB disconnect, device number 8
[15243.072422] usb 1-1.4: new full-speed USB device number 9 using xhci-mtk
[15315.676100] usb 1-1.4: USB disconnect, device number 9
[15327.292421] usb 1-1.4: new full-speed USB device number 10 using xhci-mtk
[15397.084061] usb 1-1.4: USB disconnect, device number 10
[19963.962433] usb 1-1.4: new full-speed USB device number 11 using xhci-mtk
[20387.548056] usb 1-1.4: USB disconnect, device number 11
[20423.992432] usb 1-1.4: new full-speed USB device number 12 using xhci-mtk
I cannot find such as ttyUSB
how do you want to connect your module? through USB port or GPIO? UART1/UART2 are related to GPIO pins → ttyS1/ttyS2 as ttyS0 is serial used by console. if through USB port I suggest to check all needed modules and soft to be installed as in [OpenWrt Wiki] USB Bluetooth support