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Step 3Soldering the USB to TTL-Level Serial Adapter Data Wires
Now that the ExtUSB board is soldered, the next step is to solder those wires into the respective holes in the USB to 2.8v serial board. Before continuing, it would be a good idea to grab this board and look carefully to find the GND, RX, and TX holes.
= 1. Solder the GND wire (The one Soldered in Hole 7 of the HTC ExtUSB board) in the hole labeled GND on your USB to 2.8v Serial adapter.
= 2. Solder the TXO wire (The one Soldered in Hole 8 of the HTC ExtUSB board) in the hole labeled RX on your USB to 2.8v Serial adapter.
= 3. Solder the RXI wire (The one Soldered in Hole 9 of the HTC ExtUSB board) in the hole labeled TX on your USB to 2.8v Serial adapter.
= 1. Solder the GND wire (The one Soldered in Hole 7 of the HTC ExtUSB board) in the hole labeled GND on your USB to 2.8v Serial adapter.
= 2. Solder the TXO wire (The one Soldered in Hole 8 of the HTC ExtUSB board) in the hole labeled RX on your USB to 2.8v Serial adapter.
= 3. Solder the RXI wire (The one Soldered in Hole 9 of the HTC ExtUSB board) in the hole labeled TX on your USB to 2.8v Serial adapter.
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