Is there a guide on how to flash the TP-Link AC750 Wireless Wi-Fi Travel Router (TL-WR902AC) v3?
https://openwrt.org/toh/hwdata/tp-link/tp-link_tl-wr902ac_v3
Here it is: https://git.openwrt.org/?p=openwrt/openwrt.git;a=commit;h=d13b05741a4d05a271d26fc3be61e76530025098
Recently converted a TL-WR90AC v3 to OpenWrt 18.06
Here is what the AP looks like under the plastics.
J1 is the UART Header. TX, RX , GND, +3V3
SW1 Seems to Perform (random number?) initialization which was required to flash OpenWrt 18.06 in the first instance, at least on our device.
When pressed see the following in the UART trace
Uart Trace Reports: "random: crng init done" on Next Boot.
Prior to pressing SW1 we observed some generic lzma decompression error on the Uart.
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