crwdns2935425:02crwdne2935425:0
crwdns2931653:02crwdne2931653:0
Solder thin wires to RX, TX, and GND
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The three wires should go on the pads outlined in red.
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From left to right, the pins are TX, RX, and GND.
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If you are finding it difficult to solder to the ground pin, try soldering to one of the shields, which would normally be where the blue outline is.
crwdns2944171:0crwdnd2944171:0crwdnd2944171:0crwdnd2944171:0crwdne2944171:0