Expansion wire color code
- Alex

- May 6, 2020
- 1 min read
This article is at https://forum.clockworkpi.com/t/expansion-wire-color-code/5615
Community member Michael_The_Maker asked a question on the forum: Does anyone know what the color coding on the keypad expansion wires are?

Well, we believe that was a common question that some of makers would be facing.
Fortunately, we've got some awesome folks in the community.
p3dt has offered us an instruction of the GPIO
The GPIO Table is as follows: Type Pin# (ext.) Pin # (Package) Function 1 Function 2 Pin #(sysfs) Color
3V0 1 blue
GPIO 2 PB0 UART0/2_TX PBEINT0 32 green
GPIO 3 PB1 UART0/2_RX PB-EINT1 33 yellow
GND 4 white
GPIO 5 PH5 I2C1-SDA 229 red
GPIO 6 PH4 I2C1-SCL 228 brown
GND 7 black
GPIO 8 PH6 UART3-TX SPI0-CS 230 blue
GPIO 9 PH7 UART3-RX SPI0-CLK 231 green
GPIO 10 PH9 UART3-CTS SPI0-MISO 233 yellow
GPIO 11 PH8 UART3-RTS SPI0-MOSI 232 white
GND 12 red
5V0 13 brown
5V0 14 black
Thanks again, p3dt



It actually reminds me of trying to balance things in a tricky dirvie game, where every detail matters, huh?
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thank you
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Really enjoyed this post — the wire color chart is very clear and makes understanding GPIO connections much easier. I especially appreciated how you paired pin functions with the colors. I recently saw a similar discussion on a https://www.phonydiploma.com/ blog, and it offered some interesting insights into hardware wiring conventions as well. Thanks for sharing!
Thanks for breaking this down so clearly! Understanding the different wire color codes is crucial for anyone working with hardware. I recently read a similar post on an https://thesagelawgroup.ca/ review blog, where they discussed the importance of correct wiring in tech projects.