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@@ -48,11 +48,12 @@ However, USB cables, SATA cables, and even just 4 wires have been known to be us
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### Serial Wiring
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-The 3 wires of the TRS/TRRS cable need to connect GND, VCC, and D0 (aka PDO or pin 3) between the two Pro Micros.
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+The 3 wires of the TRS/TRRS cable need to connect GND, VCC, and D0/D1/D2/D3 (aka PD0/PD1/PD2/PD3) between the two Pro Micros.
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?> Note that the pin used here is actually set by `SOFT_SERIAL_PIN` below.
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-
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+<img alt="sk-pd0-connection-mono" src="https://user-images.githubusercontent.com/2170248/92296488-28e9ad80-ef70-11ea-98be-c40cb48a0319.JPG" width="48%"/>
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+<img alt="sk-pd2-connection-mono" src="https://user-images.githubusercontent.com/2170248/92296490-2d15cb00-ef70-11ea-801f-5ace313013e6.JPG" width="48%"/>
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### I<sup>2</sup>C Wiring
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@@ -60,7 +61,7 @@ The 4 wires of the TRRS cable need to connect GND, VCC, and SCL and SDA (aka PD0
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The pull-up resistors may be placed on either half. If you wish to use the halves independently, it is also possible to use 4 resistors and have the pull-ups in both halves.
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-
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+<img alt="sk-i2c-connection-mono" src="https://user-images.githubusercontent.com/2170248/92297182-92b98580-ef77-11ea-9d7d-d6033914af43.JPG" width="50%"/>
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## Firmware Configuration
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