RP2040 Pico W Pinout & Connection We start by connecting the Grow r503 (Pro) to the RP2040 Pico W with the following pinout.
# Sensor Wire Color Function PIN# Pin Name 1 $${\color{red}RED \space Wire}$$ Power 36 $${\color{red}3V3(OUT)}$$ 2 $${\color{white}WHITE \space Wire}$$ Ground 38 $${\color{black}GND}$$ 3 $${\color{yellow}YELLOW \space Wire}$$ TX (Out) 21 $${\color{purple}UART0 \space RX (GPIO 17)}$$ 4 $${\color{purple}PURPLE \space Wire}$$ RX (In) 22 $${\color{purple}UART0 \space TX (GPIO 16)}$$ 5 $${\color{blue}BLUE \space Wire}$$ Wakeup 24 $${\color{lightgreen}GPIO 18}$$ 6 $${\color{white}WHITE \space Wire}$$ Touch 36 $${\color{red}3V3(OUT)}$$
Raspberry Pi Model B / W Boards GPIO
# Sensor Wire Color Function PIN# Pin Name 1 $${\color{red}RED \space Wire}$$ Power 3V3 $${\color{orange}3V3(OUT)}$$ 2 $${\color{white}WHITE \space Wire}$$ Ground GND $${\color{black}GND}$$ 3 $${\color{yellow}YELLOW \space Wire}$$ TX (Out) 14 $${\color{purple}UART \space RX (GPIO 14)}$$ 4 $${\color{purple}PURPLE \space Wire}$$ RX (In) 15 $${\color{purple}UART \space TX (GPIO 15)}$$ 5 $${\color{blue}BLUE \space Wire}$$ Wakeup 4 $${\color{yellow}GPIO 4}$$ 6 $${\color{white}WHITE \space Wire}$$ Touch 3V3 $${\color{red}3V3(OUT)}$$