This is a semi-customized Raspberry Pico breakout board with the GPIO pins arranged for different modules to plug in directly without jumper wires. Designed around the ssd1306 0.96" OLED display as these are easy to use, cheap, and compact. There's pads for a TP4056 USB Li-ion charging module to solder directly to the PCB to use with a Li-ion battery. These can be assembled in many ways depending on the needs of the project.

Available in two versions; a compact version and a deluxe version with extra features.

Supports direct plug in / soldering installation of (but not in any way limited to):

• 0.96" OLED 64x128 display ssd1306 I2C-1 sda=Pin(6) scl=Pin(7)
• temp/hum/press sensor BME280 I2C-0 sda=Pin(12) scl=Pin(13)
• GPS module GY-GPS6M UART-1 tx=Pin(4) rx=Pin(5)
• IMU module MPU6050 I2C-0 sda=Pin(12) scl=Pin(13)
• Ultrasonic module HC-SR04 trigger=Pin(3) echo=Pin (2)
• 8x32 LED matrix MAX7219 SPI-0 sck=Pin(18) mosi=Pin(19) cs=Pin(17)
• Push button Pin(8), Pin(9) on both PCB; also Pin(10), Pin(11) on deluxe PCB
• 3V active buzzer GPIO Pin(15)
• RTC real time clock DS3231 (deluxe version only) I2C-0 sda=Pin(20) scl=Pin(21)
• temp/hum sensor DHT11/DHT22 (deluxe version only) GPIO Pin(14)

Features:

• All GPIO pins are labeled by number for easy wiring with plenty of ground and 3.3v connection points.
• Portable power with micro USB port for charging a 18650 battery holder mounted on the back of the PCB or any 3.7v Li-ion battery with JST PHR-02 connector.
• Power switch for use with battery power. (leave off when powering with 5v from USB)
• ssd1306 0.96" OLED display installs over the Li-ion battery charging circuit and can be installed in horizonal or vertical position on the compact version PCB.
• 2 push buttons on compact version and 4 push buttons on deluxe version.
• Red and Green, SMT LEDs on compact version with additional Blue LED on deluxe version.
• 3v active buzzer
• Jumper pins allow LEDs & buzzer to be connected to / disconnected from GPIO 14, 15, 22.
• 3 Pin Servo / neopixel header; One on compact version PCB and two on deluxe version; connects to GPIO Pin (2) and (3).
• Deluxe PCB has a jumper to select ground or 3.3v common for the push buttons. (trace on PCB bottom must be cut, default ground connection)
• Deluxe PCB has DHT11 / DHT22 4p connection with solder pads for 0805 SMT 4.7k pull-up resistor and capacitor when using the sensor only (not used with 3p module)
• Deluxe PCB allows DS3231 RTC module to be soldered direct to PCB while retaining access to the battery (this is why it has the large hole)
• Kits include all parts for assembling the PCB as shown, minus the Pico microcontroller.

PCBs are available as well as separate parts kits. The parts kits are slightly different for the compact and deluxe version Pico breakout PCB so be sure to order the correct one. Kits have pre-installed 0805 SMT LEDs and current limiting resistors. Also included with the kit:

• USB Li-ion battery charging board TP4056 based
• power switch
• JST PHR-02 battery connector
• 3v active buzzer
• 2 or 4 push buttons depending on version
• male header pins (gold plated)
• various header receptacles modules (shown in picture)
• (optional) solder-on 18650 battery holder; add to cart separately

Note: 5v is only available when using USB power; 3.7v on VSYS is only available when using battery power.