With TTL-UART make troubleshoot uncomplicated!
| SoC | Total Pin | RX Pin | TX Pin |
|---|---|---|---|
RTL9601CI |
76 |
13 |
12 |
RTL9601D |
88 |
16 |
15 |
For GND and VCC (3.3) you need SFP Breakout Board to power it via external source, TTL-UART (CP210x) not enough power!
If you unable to get SFP Breakout Board, you can get SFP Seat (without cage) and power that way.
To avoid solder XPON Stick, use Flying Probe to connect tiny pin into tiny pad.
Photo by @tdmadam
Photo by @stich86
Thank you to @stich86, @tdmadam, @manias21 for finding UART pin and testing!