Anyone have a clue why I get this?
I meant that both of my routers have the same Mac addresses in wifi0, wifi1 and erh0.
Two routers - same Mac. This will break any network.
Are you experience the same problem?
I only have one so I don't get this problem.
The MAC address is extacted from the flash then one bit is changed for each interface so they shouldn't be the same on two different devices.
Mine are:
radio0: EC:41:18:C4:79:0E
radio1: EC:41:18:C4:79:0F
Following this thread it seems that the MAC address is stored in the u-boot environment. If you written the same image to both routers with your flash programmer, they will get the same MAC address. You are supposed to extract-modify-write the image from each router to retain the MAC address setting. Could this be the cause?
There is also a normal_firmware_md5= and a SN= setting.
1 Like
could anyone dump the content of th flash-chip and upload the file here, please?
I need it is a master to modify the mac adresses AND the model.
In my dumb I can get the mac fixed, but the model is set to r3gv2 and I cannot set it to r4a, which is shorter (don't know how to use a hex editor properly).
@rogerpueyo: can I get your dump, please?
I noticed that the switch is missing from the menu "Network" in OpenWrt.
On the mi router 3g (v1) the switch can be seen.
On the cli I can see that the switch is properly being detected:
root@XiaomiWifiR4A:/# ls -l /sys/class/net
lrwxrwxrwx 1 root root 0 Oct 13 19:26 br-lan -> ../../devices/virtual/net/br-lan
lrwxrwxrwx 1 root root 0 Jan 1 1970 eth0 -> ../../devices/platform/1e100000.ethernet/net/eth0
lrwxrwxrwx 1 root root 0 Oct 13 19:26 ifb0 -> ../../devices/virtual/net/ifb0
lrwxrwxrwx 1 root root 0 Oct 13 19:26 ifb1 -> ../../devices/virtual/net/ifb1
lrwxrwxrwx 1 root root 0 Jan 1 1970 lo -> ../../devices/virtual/net/lo
lrwxrwxrwx 1 root root 0 Oct 13 19:26 wlan0 -> ../../devices/pci0000:00/0000:00:01.0/0000:02:00.0/net/wlan0
lrwxrwxrwx 1 root root 0 Oct 13 19:26 wlan1 -> ../../devices/pci0000:00/0000:00:00.0/0000:01:00.0/net/wlan1
The switch is a mt7530:
root@XiaomiWifiR4A:/# swconfig list
Found: switch0 - mt7530
More details:
root@XiaomiWifiR4A:/# swconfig dev switch0 show
Global attributes:
enable_vlan: 0
mib: Switch MIB counters
PPE_AC_BCNT0: 0
PPE_AC_PCNT0: 0
PPE_AC_BCNT63: 0
PPE_AC_PCNT63: 0
PPE_MTR_CNT0: 0
PPE_MTR_CNT63: 0
GDM1_TX_GBCNT: 0
GDM1_TX_GPCNT: 0
GDM1_TX_SKIPCNT: 0
GDM1_TX_COLCNT: 0
GDM1_RX_GBCNT1: 0
GDM1_RX_GPCNT1: 0
GDM1_RX_OERCNT: 0
GDM1_RX_FERCNT: 0
GDM1_RX_SERCNT: 0
GDM1_RX_LERCNT: 0
GDM1_RX_CERCNT: 0
GDM1_RX_FCCNT: 0
GDM2_TX_GBCNT: 0
GDM2_TX_GPCNT: 0
GDM2_TX_SKIPCNT: 0
GDM2_TX_COLCNT: 0
GDM2_RX_GBCNT: 0
GDM2_RX_GPCNT: 0
GDM2_RX_OERCNT: 0
GDM2_RX_FERCNT: 0
GDM2_RX_SERCNT: 0
GDM2_RX_LERCNT: 0
GDM2_RX_CERCNT: 0
GDM2_RX_FCCNT: 0
enable_mirror_rx: 0
enable_mirror_tx: 0
mirror_monitor_port: 0
mirror_source_port: 0
Port 0:
mib: Port 0 MIB counters
TxDrop : 0
TxCRC : 0
TxUni : 0
TxMulti : 0
TxBroad : 0
TxCollision: 0
TxSingleCol: 0
TxMultiCol : 0
TxDefer : 0
TxLateCol : 0
TxExcCol : 0
TxPause : 0
Tx64Byte : 0
Tx65Byte : 0
Tx128Byte : 0
Tx256Byte : 0
Tx512Byte : 0
Tx1024Byte : 0
TxByte : 0
RxDrop : 0
RxFiltered : 0
RxUni : 0
RxMulti : 0
RxBroad : 0
RxAlignErr : 0
RxCRC : 0
RxUnderSize: 0
RxFragment : 0
RxOverSize : 0
RxJabber : 0
RxPause : 0
Rx64Byte : 0
Rx65Byte : 0
Rx128Byte : 0
Rx256Byte : 0
Rx512Byte : 0
Rx1024Byte : 0
RxByte : 0
RxCtrlDrop : 0
RxIngDrop : 0
RxARLDrop : 0
enable_mirror_rx: 0
enable_mirror_tx: 0
pvid: 1
link: port:0 link:down
Port 1:
mib: Port 1 MIB counters
TxDrop : 0
TxCRC : 0
TxUni : 0
TxMulti : 0
TxBroad : 0
TxCollision: 0
TxSingleCol: 0
TxMultiCol : 0
TxDefer : 0
TxLateCol : 0
TxExcCol : 0
TxPause : 0
Tx64Byte : 0
Tx65Byte : 0
Tx128Byte : 0
Tx256Byte : 0
Tx512Byte : 0
Tx1024Byte : 0
TxByte : 0
RxDrop : 0
RxFiltered : 0
RxUni : 0
RxMulti : 0
RxBroad : 0
RxAlignErr : 0
RxCRC : 0
RxUnderSize: 0
RxFragment : 0
RxOverSize : 0
RxJabber : 0
RxPause : 0
Rx64Byte : 0
Rx65Byte : 0
Rx128Byte : 0
Rx256Byte : 0
Rx512Byte : 0
Rx1024Byte : 0
RxByte : 0
RxCtrlDrop : 0
RxIngDrop : 0
RxARLDrop : 0
enable_mirror_rx: 0
enable_mirror_tx: 0
pvid: 1
link: port:1 link:down
Port 2:
mib: Port 2 MIB counters
TxDrop : 0
TxCRC : 0
TxUni : 1999
TxMulti : 48
TxBroad : 7
TxCollision: 0
TxSingleCol: 0
TxMultiCol : 0
TxDefer : 0
TxLateCol : 0
TxExcCol : 0
TxPause : 0
Tx64Byte : 789
Tx65Byte : 650
Tx128Byte : 258
Tx256Byte : 67
Tx512Byte : 97
Tx1024Byte : 193
TxByte : 510695
RxDrop : 0
RxFiltered : 0
RxUni : 1990
RxMulti : 593
RxBroad : 610
RxAlignErr : 0
RxCRC : 0
RxUnderSize: 0
RxFragment : 0
RxOverSize : 0
RxJabber : 0
RxPause : 0
Rx64Byte : 986
Rx65Byte : 1144
Rx128Byte : 378
Rx256Byte : 186
Rx512Byte : 135
Rx1024Byte : 364
RxByte : 890268
RxCtrlDrop : 0
RxIngDrop : 0
RxARLDrop : 0
enable_mirror_rx: 0
enable_mirror_tx: 0
pvid: 1
link: port:2 link:up speed:1000baseT full-duplex
Port 3:
mib: Port 3 MIB counters
TxDrop : 0
TxCRC : 0
TxUni : 0
TxMulti : 0
TxBroad : 0
TxCollision: 0
TxSingleCol: 0
TxMultiCol : 0
TxDefer : 0
TxLateCol : 0
TxExcCol : 0
TxPause : 0
Tx64Byte : 0
Tx65Byte : 0
Tx128Byte : 0
Tx256Byte : 0
Tx512Byte : 0
Tx1024Byte : 0
TxByte : 0
RxDrop : 0
RxFiltered : 0
RxUni : 0
RxMulti : 0
RxBroad : 0
RxAlignErr : 0
RxCRC : 0
RxUnderSize: 0
RxFragment : 0
RxOverSize : 0
RxJabber : 0
RxPause : 0
Rx64Byte : 0
Rx65Byte : 0
Rx128Byte : 0
Rx256Byte : 0
Rx512Byte : 0
Rx1024Byte : 0
RxByte : 0
RxCtrlDrop : 0
RxIngDrop : 0
RxARLDrop : 0
enable_mirror_rx: 0
enable_mirror_tx: 0
pvid: 1
link: port:3 link:down
Port 4:
mib: Port 4 MIB counters
TxDrop : 0
TxCRC : 0
TxUni : 0
TxMulti : 0
TxBroad : 0
TxCollision: 0
TxSingleCol: 0
TxMultiCol : 0
TxDefer : 0
TxLateCol : 0
TxExcCol : 0
TxPause : 0
Tx64Byte : 0
Tx65Byte : 0
Tx128Byte : 0
Tx256Byte : 0
Tx512Byte : 0
Tx1024Byte : 0
TxByte : 0
RxDrop : 0
RxFiltered : 0
RxUni : 0
RxMulti : 0
RxBroad : 0
RxAlignErr : 0
RxCRC : 0
RxUnderSize: 0
RxFragment : 0
RxOverSize : 0
RxJabber : 0
RxPause : 0
Rx64Byte : 0
Rx65Byte : 0
Rx128Byte : 0
Rx256Byte : 0
Rx512Byte : 0
Rx1024Byte : 0
RxByte : 0
RxCtrlDrop : 0
RxIngDrop : 0
RxARLDrop : 0
enable_mirror_rx: 0
enable_mirror_tx: 0
pvid: 2
link: port:4 link:down
Port 5:
mib: Port 5 MIB counters
TxDrop : 0
TxCRC : 0
TxUni : 0
TxMulti : 0
TxBroad : 0
TxCollision: 0
TxSingleCol: 0
TxMultiCol : 0
TxDefer : 0
TxLateCol : 0
TxExcCol : 0
TxPause : 0
Tx64Byte : 0
Tx65Byte : 0
Tx128Byte : 0
Tx256Byte : 0
Tx512Byte : 0
Tx1024Byte : 0
TxByte : 0
RxDrop : 0
RxFiltered : 0
RxUni : 0
RxMulti : 0
RxBroad : 0
RxAlignErr : 0
RxCRC : 0
RxUnderSize: 0
RxFragment : 0
RxOverSize : 0
RxJabber : 0
RxPause : 0
Rx64Byte : 0
Rx65Byte : 0
Rx128Byte : 0
Rx256Byte : 0
Rx512Byte : 0
Rx1024Byte : 0
RxByte : 0
RxCtrlDrop : 0
RxIngDrop : 0
RxARLDrop : 0
enable_mirror_rx: 0
enable_mirror_tx: 0
pvid: 1
link: port:5 link:down
Port 6:
mib: Port 6 MIB counters
TxDrop : 0
TxCRC : 0
TxUni : 1996
TxMulti : 594
TxBroad : 612
TxCollision: 0
TxSingleCol: 0
TxMultiCol : 0
TxDefer : 0
TxLateCol : 0
TxExcCol : 0
TxPause : 0
Tx64Byte : 990
Tx65Byte : 1147
Tx128Byte : 378
Tx256Byte : 186
Tx512Byte : 137
Tx1024Byte : 364
TxByte : 892027
RxDrop : 0
RxFiltered : 50
RxUni : 2007
RxMulti : 77
RxBroad : 25
RxAlignErr : 0
RxCRC : 0
RxUnderSize: 0
RxFragment : 0
RxOverSize : 0
RxJabber : 0
RxPause : 0
Rx64Byte : 795
Rx65Byte : 672
Rx128Byte : 268
Rx256Byte : 83
Rx512Byte : 97
Rx1024Byte : 194
RxByte : 521195
RxCtrlDrop : 0
RxIngDrop : 0
RxARLDrop : 0
enable_mirror_rx: 0
enable_mirror_tx: 0
pvid: 1
link: port:6 link:up speed:1000baseT full-duplex
Port 7:
mib: Port 7 MIB counters
TxDrop : 0
TxCRC : 0
TxUni : 0
TxMulti : 0
TxBroad : 0
TxCollision: 0
TxSingleCol: 0
TxMultiCol : 0
TxDefer : 0
TxLateCol : 0
TxExcCol : 0
TxPause : 0
Tx64Byte : 0
Tx65Byte : 0
Tx128Byte : 0
Tx256Byte : 0
Tx512Byte : 0
Tx1024Byte : 0
TxByte : 0
RxDrop : 0
RxFiltered : 0
RxUni : 0
RxMulti : 0
RxBroad : 0
RxAlignErr : 0
RxCRC : 0
RxUnderSize: 0
RxFragment : 0
RxOverSize : 0
RxJabber : 0
RxPause : 0
Rx64Byte : 0
Rx65Byte : 0
Rx128Byte : 0
Rx256Byte : 0
Rx512Byte : 0
Rx1024Byte : 0
RxByte : 0
RxCtrlDrop : 0
RxIngDrop : 0
RxARLDrop : 0
enable_mirror_rx: 0
enable_mirror_tx: 0
pvid: 0
link: port:7 link:down
VLAN 1:
vid: 1
ports: 0 1 2 3 5 6t
VLAN 2:
vid: 2
ports: 4 6t
root@XiaomiWifiR4A:/# swconfig dev switch0 show
Global attributes:
enable_vlan: 0
mib: Switch MIB counters
PPE_AC_BCNT0: 0
PPE_AC_PCNT0: 0
PPE_AC_BCNT63: 0
PPE_AC_PCNT63: 0
PPE_MTR_CNT0: 0
PPE_MTR_CNT63: 0
GDM1_TX_GBCNT: 0
GDM1_TX_GPCNT: 0
GDM1_TX_SKIPCNT: 0
GDM1_TX_COLCNT: 0
GDM1_RX_GBCNT1: 0
GDM1_RX_GPCNT1: 0
GDM1_RX_OERCNT: 0
GDM1_RX_FERCNT: 0
GDM1_RX_SERCNT: 0
GDM1_RX_LERCNT: 0
GDM1_RX_CERCNT: 0
GDM1_RX_FCCNT: 0
GDM2_TX_GBCNT: 0
GDM2_TX_GPCNT: 0
GDM2_TX_SKIPCNT: 0
GDM2_TX_COLCNT: 0
GDM2_RX_GBCNT: 0
GDM2_RX_GPCNT: 0
GDM2_RX_OERCNT: 0
GDM2_RX_FERCNT: 0
GDM2_RX_SERCNT: 0
GDM2_RX_LERCNT: 0
GDM2_RX_CERCNT: 0
GDM2_RX_FCCNT: 0
enable_mirror_rx: 0
enable_mirror_tx: 0
mirror_monitor_port: 0
mirror_source_port: 0
Port 0:
mib: Port 0 MIB counters
TxDrop : 0
TxCRC : 0
TxUni : 0
TxMulti : 0
TxBroad : 0
TxCollision: 0
TxSingleCol: 0
TxMultiCol : 0
TxDefer : 0
TxLateCol : 0
TxExcCol : 0
TxPause : 0
Tx64Byte : 0
Tx65Byte : 0
Tx128Byte : 0
Tx256Byte : 0
Tx512Byte : 0
Tx1024Byte : 0
TxByte : 0
RxDrop : 0
RxFiltered : 0
RxUni : 0
RxMulti : 0
RxBroad : 0
RxAlignErr : 0
RxCRC : 0
RxUnderSize: 0
RxFragment : 0
RxOverSize : 0
RxJabber : 0
RxPause : 0
Rx64Byte : 0
Rx65Byte : 0
Rx128Byte : 0
Rx256Byte : 0
Rx512Byte : 0
Rx1024Byte : 0
RxByte : 0
RxCtrlDrop : 0
RxIngDrop : 0
RxARLDrop : 0
enable_mirror_rx: 0
enable_mirror_tx: 0
pvid: 1
link: port:0 link:down
Port 1:
mib: Port 1 MIB counters
TxDrop : 0
TxCRC : 0
TxUni : 0
TxMulti : 0
TxBroad : 0
TxCollision: 0
TxSingleCol: 0
TxMultiCol : 0
TxDefer : 0
TxLateCol : 0
TxExcCol : 0
TxPause : 0
Tx64Byte : 0
Tx65Byte : 0
Tx128Byte : 0
Tx256Byte : 0
Tx512Byte : 0
Tx1024Byte : 0
TxByte : 0
RxDrop : 0
RxFiltered : 0
RxUni : 0
RxMulti : 0
RxBroad : 0
RxAlignErr : 0
RxCRC : 0
RxUnderSize: 0
RxFragment : 0
RxOverSize : 0
RxJabber : 0
RxPause : 0
Rx64Byte : 0
Rx65Byte : 0
Rx128Byte : 0
Rx256Byte : 0
Rx512Byte : 0
Rx1024Byte : 0
RxByte : 0
RxCtrlDrop : 0
RxIngDrop : 0
RxARLDrop : 0
enable_mirror_rx: 0
enable_mirror_tx: 0
pvid: 1
link: port:1 link:down
Port 2:
mib: Port 2 MIB counters
TxDrop : 0
TxCRC : 0
TxUni : 2708
TxMulti : 72
TxBroad : 7
TxCollision: 0
TxSingleCol: 0
TxMultiCol : 0
TxDefer : 0
TxLateCol : 0
TxExcCol : 0
TxPause : 0
Tx64Byte : 1235
Tx65Byte : 815
Tx128Byte : 367
Tx256Byte : 76
Tx512Byte : 101
Tx1024Byte : 193
TxByte : 577102
RxDrop : 0
RxFiltered : 0
RxUni : 2990
RxMulti : 922
RxBroad : 956
RxAlignErr : 0
RxCRC : 0
RxUnderSize: 0
RxFragment : 0
RxOverSize : 0
RxJabber : 0
RxPause : 0
Rx64Byte : 1393
Rx65Byte : 1610
Rx128Byte : 598
Rx256Byte : 381
Rx512Byte : 150
Rx1024Byte : 736
RxByte : 1592118
RxCtrlDrop : 0
RxIngDrop : 0
RxARLDrop : 0
enable_mirror_rx: 0
enable_mirror_tx: 0
pvid: 1
link: port:2 link:up speed:1000baseT full-duplex
Port 3:
mib: Port 3 MIB counters
TxDrop : 0
TxCRC : 0
TxUni : 0
TxMulti : 0
TxBroad : 0
TxCollision: 0
TxSingleCol: 0
TxMultiCol : 0
TxDefer : 0
TxLateCol : 0
TxExcCol : 0
TxPause : 0
Tx64Byte : 0
Tx65Byte : 0
Tx128Byte : 0
Tx256Byte : 0
Tx512Byte : 0
Tx1024Byte : 0
TxByte : 0
RxDrop : 0
RxFiltered : 0
RxUni : 0
RxMulti : 0
RxBroad : 0
RxAlignErr : 0
RxCRC : 0
RxUnderSize: 0
RxFragment : 0
RxOverSize : 0
RxJabber : 0
RxPause : 0
Rx64Byte : 0
Rx65Byte : 0
Rx128Byte : 0
Rx256Byte : 0
Rx512Byte : 0
Rx1024Byte : 0
RxByte : 0
RxCtrlDrop : 0
RxIngDrop : 0
RxARLDrop : 0
enable_mirror_rx: 0
enable_mirror_tx: 0
pvid: 1
link: port:3 link:down
Port 4:
mib: Port 4 MIB counters
TxDrop : 0
TxCRC : 0
TxUni : 0
TxMulti : 0
TxBroad : 0
TxCollision: 0
TxSingleCol: 0
TxMultiCol : 0
TxDefer : 0
TxLateCol : 0
TxExcCol : 0
TxPause : 0
Tx64Byte : 0
Tx65Byte : 0
Tx128Byte : 0
Tx256Byte : 0
Tx512Byte : 0
Tx1024Byte : 0
TxByte : 0
RxDrop : 0
RxFiltered : 0
RxUni : 0
RxMulti : 0
RxBroad : 0
RxAlignErr : 0
RxCRC : 0
RxUnderSize: 0
RxFragment : 0
RxOverSize : 0
RxJabber : 0
RxPause : 0
Rx64Byte : 0
Rx65Byte : 0
Rx128Byte : 0
Rx256Byte : 0
Rx512Byte : 0
Rx1024Byte : 0
RxByte : 0
RxCtrlDrop : 0
RxIngDrop : 0
RxARLDrop : 0
enable_mirror_rx: 0
enable_mirror_tx: 0
pvid: 2
link: port:4 link:down
Port 5:
mib: Port 5 MIB counters
TxDrop : 0
TxCRC : 0
TxUni : 0
TxMulti : 0
TxBroad : 0
TxCollision: 0
TxSingleCol: 0
TxMultiCol : 0
TxDefer : 0
TxLateCol : 0
TxExcCol : 0
TxPause : 0
Tx64Byte : 0
Tx65Byte : 0
Tx128Byte : 0
Tx256Byte : 0
Tx512Byte : 0
Tx1024Byte : 0
TxByte : 0
RxDrop : 0
RxFiltered : 0
RxUni : 0
RxMulti : 0
RxBroad : 0
RxAlignErr : 0
RxCRC : 0
RxUnderSize: 0
RxFragment : 0
RxOverSize : 0
RxJabber : 0
RxPause : 0
Rx64Byte : 0
Rx65Byte : 0
Rx128Byte : 0
Rx256Byte : 0
Rx512Byte : 0
Rx1024Byte : 0
RxByte : 0
RxCtrlDrop : 0
RxIngDrop : 0
RxARLDrop : 0
enable_mirror_rx: 0
enable_mirror_tx: 0
pvid: 1
link: port:5 link:down
Port 6:
mib: Port 6 MIB counters
TxDrop : 0
TxCRC : 0
TxUni : 2990
TxMulti : 922
TxBroad : 956
TxCollision: 0
TxSingleCol: 0
TxMultiCol : 0
TxDefer : 0
TxLateCol : 0
TxExcCol : 0
TxPause : 0
Tx64Byte : 1393
Tx65Byte : 1610
Tx128Byte : 598
Tx256Byte : 381
Tx512Byte : 150
Tx1024Byte : 736
TxByte : 1592118
RxDrop : 0
RxFiltered : 50
RxUni : 2711
RxMulti : 101
RxBroad : 25
RxAlignErr : 0
RxCRC : 0
RxUnderSize: 0
RxFragment : 0
RxOverSize : 0
RxJabber : 0
RxPause : 0
Rx64Byte : 1239
Rx65Byte : 835
Rx128Byte : 376
Rx256Byte : 92
Rx512Byte : 101
Rx1024Byte : 194
RxByte : 587149
RxCtrlDrop : 0
RxIngDrop : 0
RxARLDrop : 0
enable_mirror_rx: 0
enable_mirror_tx: 0
pvid: 1
link: port:6 link:up speed:1000baseT full-duplex
Port 7:
mib: Port 7 MIB counters
TxDrop : 0
TxCRC : 0
TxUni : 0
TxMulti : 0
TxBroad : 0
TxCollision: 0
TxSingleCol: 0
TxMultiCol : 0
TxDefer : 0
TxLateCol : 0
TxExcCol : 0
TxPause : 0
Tx64Byte : 0
Tx65Byte : 0
Tx128Byte : 0
Tx256Byte : 0
Tx512Byte : 0
Tx1024Byte : 0
TxByte : 0
RxDrop : 0
RxFiltered : 0
RxUni : 0
RxMulti : 0
RxBroad : 0
RxAlignErr : 0
RxCRC : 0
RxUnderSize: 0
RxFragment : 0
RxOverSize : 0
RxJabber : 0
RxPause : 0
Rx64Byte : 0
Rx65Byte : 0
Rx128Byte : 0
Rx256Byte : 0
Rx512Byte : 0
Rx1024Byte : 0
RxByte : 0
RxCtrlDrop : 0
RxIngDrop : 0
RxARLDrop : 0
enable_mirror_rx: 0
enable_mirror_tx: 0
pvid: 0
link: port:7 link:down
VLAN 1:
vid: 1
ports: 0 1 2 3 5 6t
VLAN 2:
vid: 2
ports: 4 6t
As one can see there are vlans configured.
I don't know why the openwrt gui doesn't recognize the switch.
According to this thread, the file /etc/board.d/02_network must be adjusted so that it works with the R4A.
It's my fault sorry.
The latest build linked is causing this.
I've a new build that has this bug solved.
I'll upload it to my drive when I get a chance.
1 Like
New build
The switch works with your new build from 15-10-19 
Good job!
The WAN-port had a different naming compared to the mi router 3g, so you cannot copy configs 1:1 without modifying them. I need to analyze this further.
I found a problem with ssh-logins: they are not possible with a public key, because the file /etc/dropbear/authorized_keys is writable by group and others, you must perform a "chmod g-w o-w" on it. It would be great to receive a fix for the next build.
1 Like
Edited:
nvm i used the wrong socket for the SOIC8 clip. now im getting a "No EEPROM/flash device found" soo it seems that i really need to plug the CH341a 3.3.v to the Router. oh well going to order a dupont cable
It's because I pulled rogerpueyo's PR and the earlier builds were based on a different patch. The switch layout is slightly different.
I also fell for the 3.3 volts, but they're not necessary. If you get the no EEPROM-error, something is wrong with the connection. Try to reattache the clip.
When flashing, one can see erase-errors - their root cause also is a clip that's not properly attached.
ahhh i see, i'll try it again later
Ok i was able to flash the edited .bin file to my router via CH341a spi, softbricked my router while doing it as well LOL because the spi flasher keeps on disconnecting had to switch it to my other USB port and it worked.
It got bricked when the flasher was done erasing the chip and was about to write the edited bin then suddenly the USB disconnected.
Anyway i got it back up and working, only step left is the serial port. Can anyone show me a picture on how you guys connect the USB serial port to the router?? also i've read that the black Ch341a programmer has a UART mode can anyone shed some light on how to us it so i dont have to get a USB to serial port adapter LOL!
Thanks!
Usually there is a jumper connector on the flasher to switch between flasher mode and TTL UART adapter mode. If I'm not mistaken, in mine, short pins 1-2 for flasher mode and short pins 2-3 for TTL UART adapter mode. If in doubt, please post pictures of your flasher (from the top and from below).
And yes, the USB port you connect it may make a big difference (for example some may not have enough power for some reason but others do).
Heres my Ch341a mini programmer. By jumper connector you mean the yellow sleeve?
once i switch the jumper connector to pins 2-3 what should i do next to connect it to the router?
Thanks!
Looks like It's the same as mine (see the pictures I put earlier on the thread).
Yes, the yellow connector, to switch to TTL UART mode you need to switch it to jumpers 2-3. When you connect it back to the computer, on Linux you should see a new /dev/ttyUSB(something) device, on windows you should see a new COM port appear.
Then you'll need some cables with "dupont" connectors, like these:
Connect them to connect to the TXD, RXD and GND pins on that same row, to (respectively) the RXD, TXD and GND UART pins on the router's board. They are shown in the first posts, these are the ones:
https://forum.openwrt.org/uploads/default/original/2X/0/083791d2baf442f1fbc8ae18e5d99fa0b9cb0c66.jpeg
Unless you want to do some soldering, you'll probably need something like these pin headers (for me, they came with the flasher):
You shouldn't need to solder them, as usually just placing this piece with 4 pins on top of the router's UART port holes just fits and makes enough contact (it did for me). Then use dupont (female to female) cables to connect the flasher to these pin headers, and thus to the router's UART port. This is how I did it, but you should be able to get the general idea should you want to do some other way.
Important:
- do NOT connect the VCC pin, you only need to connect the other 3
- GND connects to GND on the other side
- TX from one side should connect to RX on the other side and vice versa
Finally use a terminal emulator (like putty on windows, or like minicom or screen on Linux, or equivalent on Mac) connected to the COM / ttyUSB port of the TTL adapter with baud rate 115200, and when you power on the router you should see its console and be able to interact with it like described in the first posts.
thanks! i'll purchase dupont connectors today.
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@araujorm thanks for the help! was able to successfully flash the router to Openwrt! the 4 pin that came with my flasher didn't fit the holes for the TX and RT port had to grab the 4 pin that came with my faulty CH341a programmer.
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There is a report at https://www.ise.io/whitepaper/sohopelessly-broken-2/ about how to get shell access on a Mi Router 3. Maybe something like that is present on 4A too? Or not, it was reported to Xiaomi late 2018 so it might be already fixed in the oldest available firmware.