Circuit Documentation

Summary

This document provides a detailed overview of a circuit that includes a Raspberry Pi Pico microcontroller, various sensors, a GPS module, a battery management system, and other components. The circuit is designed to interface with multiple peripherals and manage power efficiently.

Component List

1. Raspberry Pi Pico

   • Description: A microcontroller board based on the RP2040 microcontroller chip.
   • Pins: pin 1 to pin 43

2. TP4056

   • Description: A lithium battery charger module.
   • Pins: OUT-, B-, B+, OUT+, IN-, IN+

3. LiPoly Battery (1300mAh)

   • Description: A rechargeable lithium polymer battery.
   • Pins: positive, negative

4. Toggle Switch

   • Description: A simple on/off switch.
   • Pins: L1, COM, L2

5. MPU9250/GY-91

   • Description: A 9-axis motion tracking device.
   • Pins: 3V3, GND, SCL, SDA, VIN/5V

6. neo 6m gps

   • Description: A GPS module for location tracking.
   • Pins: VCC, GND, RXD, TXD, PPS

7. BMP280

   • Description: A barometric pressure sensor.
   • Pins: VCC, GND, SCL, SDA, CSB, SDO

8. WLR089-CanSAT

   • Description: A wireless communication module.
   • Pins: USR, 3v6, TXD, RXD, GND, RES

9. SD SDHC

   • Description: An SD card module for data storage.
   • Pins: 3V3, CS, MOSI, CLK, MISO, GND

Wiring Details

Raspberry Pi Pico

• pin 1: Connected to neo 6m gps RXD
• pin 2: Connected to neo 6m gps TXD
• pin 3: Connected to neo 6m gps GND
• pin 6: Connected to BMP280 SDA
• pin 7: Connected to BMP280 SCL
• pin 8: Connected to BMP280 GND
• pin 11: Connected to WLR089-CanSAT RXD
• pin 12: Connected to WLR089-CanSAT TXD
• pin 21: Connected to SD SDHC MISO
• pin 23: Connected to WLR089-CanSAT GND, SD SDHC GND
• pin 24: Connected to SD SDHC CLK
• pin 25: Connected to SD SDHC MOSI
• pin 26: Connected to SD SDHC CS
• pin 31: Connected to MPU9250/GY-91 SDA
• pin 32: Connected to MPU9250/GY-91 SCL
• pin 33: Connected to MPU9250/GY-91 GND
• pin 36: Connected to WLR089-CanSAT 3v6, MPU9250/GY-91 3V3, SD SDHC 3V3, neo 6m gps VCC, BMP280 VCC
• pin 38: Connected to TP4056 OUT-
• pin 39: Connected to Toggle Switch COM

TP4056

• OUT-: Connected to Raspberry Pi Pico pin 38
• B-: Connected to LiPoly Battery (1300mAh) negative
• B+: Connected to LiPoly Battery (1300mAh) positive
• OUT+: Connected to Toggle Switch L2

LiPoly Battery (1300mAh)

• positive: Connected to TP4056 B+
• negative: Connected to TP4056 B-

Toggle Switch

• L1: Not connected
• COM: Connected to Raspberry Pi Pico pin 39
• L2: Connected to TP4056 OUT+

MPU9250/GY-91

• 3V3: Connected to Raspberry Pi Pico pin 36
• GND: Connected to Raspberry Pi Pico pin 33
• SCL: Connected to Raspberry Pi Pico pin 32
• SDA: Connected to Raspberry Pi Pico pin 31
• VIN/5V: Not connected

neo 6m gps

• VCC: Connected to Raspberry Pi Pico pin 36
• GND: Connected to Raspberry Pi Pico pin 3
• RXD: Connected to Raspberry Pi Pico pin 1
• TXD: Connected to Raspberry Pi Pico pin 2
• PPS: Not connected

BMP280

• VCC: Connected to Raspberry Pi Pico pin 36
• GND: Connected to Raspberry Pi Pico pin 8
• SCL: Connected to Raspberry Pi Pico pin 7
• SDA: Connected to Raspberry Pi Pico pin 6
• CSB: Not connected
• SDO: Not connected

WLR089-CanSAT

• 3v6: Connected to Raspberry Pi Pico pin 36
• GND: Connected to Raspberry Pi Pico pin 23
• RXD: Connected to Raspberry Pi Pico pin 11
• TXD: Connected to Raspberry Pi Pico pin 12
• USR: Not connected
• RES: Not connected

SD SDHC

• 3V3: Connected to Raspberry Pi Pico pin 36
• GND: Connected to Raspberry Pi Pico pin 23
• CS: Connected to Raspberry Pi Pico pin 26
• MOSI: Connected to Raspberry Pi Pico pin 25
• CLK: Connected to Raspberry Pi Pico pin 24
• MISO: Connected to Raspberry Pi Pico pin 21

Documented Code

Raspberry Pi Pico Code

void setup() {
  // put your setup code here, to run once:

}

void loop() {
  // put your main code here, to run repeatedly:

}

This concludes the documentation for the circuit. Each component is connected as specified, and the provided code is a basic template for the Raspberry Pi Pico.