wiki de Rolf

getting started with the pico
libro "Raspberry Pi Pico Tips and Tricks"
Pico: Interrupts and Timer Interrupts (MicroPython)
Pico: 20 Free Guides for Sensors and Modules

https://picockpit.com/raspberry-pi/es/todo-sobre-la-frambuesa-pi-pico-w/
microPython en raspberry pico
https://electrocredible.com/category/embedded-systems/raspberry-pi-pico/

https://peppe8o.com/raspberry-pi-pico-ethernet-port-adding-the-wiznet-ethernet-hat/

 Raspberry Pico RP2040
 GPIO 0 = pin 1 = UART-TX 
 GPIO 1 = pin 2 = UART-RX 
          pin 3 = ground
 GPIO 2 = pin 4 = Dig INPUT 1 
 GPIO 3 = pin 5 = Dig INPUT 2 
 GPIO 4 = pin 6 = Dig INPUT 3 
 GPIO 5 = pin 7 = Dig INPUT 4 
          pin 8 = ground
 GPIO 6 = pin 9 = Dig INPUT 5 
 GPIO 7 = pin 10 = Dig INPUT 6 
 GPIO 8 = pin 11 = I2C-SDA 
 GPIO 9 = pin 12 = I2C-SCL 
          pin 13 = ground
 GPIO 10 = pin 14 = Dig INPUT 7 
 GPIO 11 = pin 15 = Dig INPUT 8 
 GPIO 12 = pin 16 = Dig INPUT 9 
 GPIO 13 = pin 17 = Dig INPUT 10 
           pin 18 = ground
 GPIO 14 = pin 19 = Dig INPUT 11 
 GPIO 15 = pin 20 = Dig INPUT 12 
 
 GPIO 16 = pin 21 = Dig OUT 7 
 GPIO 17 = pin 22 = Dig OUT 6 
           pin 23 = ground
 GPIO 18 = pin 24 = Dig OUT 5 
 GPIO 19 = pin 25 = Dig OUT 4 
 GPIO 20 = pin 26 = Dig OUT 3 
 GPIO 21 = pin 27 = Dig OUT 2 
           pin 28 = ground
 GPIO 22 = pin 29 = Dig OUT 1  
           pin 30 = RUN | Reset
 GPIO 23 = OP wireless power on signal  
 GPIO 24 = OP/IP wireless SPI data/IRQ  
 GPIO 25 = OP wireless SPI CS when high (LED) 
 GPIO 26 = pin 31 = ANALOG In 0 
 GPIO 27 = pin 32 = ANALOG In 1 
           pin 33 = Analog Ground
 GPIO 28 = pin 34 = ANALOG In 2 
 GPIO 29 = OP/IP wireless SPI CLK/ADC (ADC3 := VSYS/3) 
           pin 35 = Analog Volt Reference
           pin 36 = power +3,3 volt (out max 300mA)
           pin 37 = 3,3v Enable
           pin 38 = power ground
           pin 39 = power +5 volt (in)
           pin 40 = power USB bus volt