Circuit Documentation

Summary

This document provides a detailed overview of a custom circuit design. The circuit includes multiple microcontrollers, sensors, and communication modules. The primary microcontrollers used are the Maple Mini STM32F1 and the Arduino Pro Mini. The circuit also integrates an nRF52840 ProMicro for wireless communication, a Si4463 Custom Breakout for RF communication, an SSD1306 OLED display for visual output, an SD SDHC card module for storage, and a USB Serial TTL for serial communication.

Component List

1. Maple Mini STM32F1

   • Description: A microcontroller board based on the STM32F1 series.
   • Pins: Vcc, GND, Vbat, 14, 13, 12, RST, 11, 10, 9, 8, 7, 6, 5, 4, 3, 2, 1, 0, Vin, 31, 30, 28, 27, 26, 25, 24, 23, 22, 21, 20, 19, 18, 17, 16, 15, but

2. nRF52840 ProMicro

   • Description: A microcontroller board with integrated Bluetooth and wireless communication capabilities.
   • Pins: B+, RAW, GND, RST, VCC, 31, 29, 2, 115, 113, 111, 10, 600, B-, 6, 8, 17, 20, 22, 24, 100, 11, 104, 106, 107, 102, 101

3. Si4463 Custom Breakout

   • Description: A breakout board for the Si4463 RF transceiver.
   • Pins: Vcc, GPIO1, IRQ, SCLK, MISO, MOSI, SS, GPIO3, SDN, GND

4. USB Serial TTL

   • Description: A USB to TTL serial converter.
   • Pins: GND, 5V, TX, RX, DTR, 3.3V

5. SSD1306 128x64 SPI OLED

   • Description: A 128x64 pixel OLED display with SPI interface.
   • Pins: GND, Vcc, SCLK, MOSI, Reset, DC, CS

6. SD SDHC

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

7. Arduino Pro Mini

   • Description: A compact microcontroller board based on the ATmega328P.
   • Pins: DTR, TXO, RXI, VCC, GND, A4, A5, RAW, RESET, A3, A2, A1, A0, SCK, MISO, MOSI, D10, D9, D8, D7, D6, D5, D4, D3, D2

Wiring Details

Maple Mini STM32F1

• Vcc connected to:

  • Arduino Pro Mini VCC
  • SD SDHC 3V3
  • Si4463 Custom Breakout Vcc

• GND connected to:

  • SSD1306 128x64 SPI OLED GND
  • nRF52840 ProMicro GND
  • Arduino Pro Mini GND
  • SD SDHC GND
  • USB Serial TTL GND
  • Si4463 Custom Breakout GND

• Pin 11 connected to SSD1306 128x64 SPI OLED Reset

• Pin 10 connected to SSD1306 128x64 SPI OLED DC

• Pin 9 connected to nRF52840 ProMicro 22

• Pin 8 connected to nRF52840 ProMicro 24

• Pin 7 connected to SSD1306 128x64 SPI OLED CS

• Pin 6 connected to SSD1306 128x64 SPI OLED SCLK

• Pin 4 connected to SSD1306 128x64 SPI OLED MOSI

• Vin connected to:

  • nRF52840 ProMicro RAW
  • USB Serial TTL 5V
  • SSD1306 128x64 SPI OLED Vcc

• Pin 31 connected to Si4463 Custom Breakout SS

• Pin 30 connected to Si4463 Custom Breakout SCLK

• Pin 28 connected to Si4463 Custom Breakout MOSI

• Pin 26 connected to USB Serial TTL RX

• Pin 25 connected to USB Serial TTL TX

• Pin 22 connected to Si4463 Custom Breakout SDN

• Pin 21 connected to Si4463 Custom Breakout IRQ

• Pin 16 connected to Arduino Pro Mini A5

• Pin 15 connected to Arduino Pro Mini A4

nRF52840 ProMicro

• RAW connected to Maple Mini STM32F1 Vin

• GND connected to:

  • Arduino Pro Mini GND
  • Maple Mini STM32F1 GND
  • SD SDHC GND
  • USB Serial TTL GND
  • Si4463 Custom Breakout GND

• Pin 22 connected to Maple Mini STM32F1 Pin 9

• Pin 24 connected to Maple Mini STM32F1 Pin 8

Si4463 Custom Breakout

• Vcc connected to:

  • Maple Mini STM32F1 Vcc
  • Arduino Pro Mini VCC
  • SD SDHC 3V3

• GND connected to:

  • Maple Mini STM32F1 GND
  • SSD1306 128x64 SPI OLED GND
  • nRF52840 ProMicro GND
  • Arduino Pro Mini GND
  • SD SDHC GND
  • USB Serial TTL GND

• SS connected to Maple Mini STM32F1 Pin 31

• SCLK connected to Maple Mini STM32F1 Pin 30

• MISO connected to Maple Mini STM32F1 Pin 29

• MOSI connected to Maple Mini STM32F1 Pin 28

• SDN connected to Maple Mini STM32F1 Pin 22

• IRQ connected to Maple Mini STM32F1 Pin 21

USB Serial TTL

• 5V connected to Maple Mini STM32F1 Vin

• GND connected to:

  • Maple Mini STM32F1 GND
  • SSD1306 128x64 SPI OLED GND
  • nRF52840 ProMicro GND
  • Arduino Pro Mini GND
  • SD SDHC GND
  • Si4463 Custom Breakout GND

• RX connected to Maple Mini STM32F1 Pin 26

• TX connected to Maple Mini STM32F1 Pin 25

SSD1306 128x64 SPI OLED

• GND connected to:

  • Maple Mini STM32F1 GND
  • nRF52840 ProMicro GND
  • Arduino Pro Mini GND
  • SD SDHC GND
  • USB Serial TTL GND
  • Si4463 Custom Breakout GND

• Vcc connected to Maple Mini STM32F1 Vin

• Reset connected to Maple Mini STM32F1 Pin 11

• DC connected to Maple Mini STM32F1 Pin 10

• CS connected to Maple Mini STM32F1 Pin 7

• SCLK connected to Maple Mini STM32F1 Pin 6

• MOSI connected to Maple Mini STM32F1 Pin 4

SD SDHC

• 3V3 connected to:

  • Maple Mini STM32F1 Vcc
  • Arduino Pro Mini VCC
  • Si4463 Custom Breakout Vcc

• GND connected to:

  • Maple Mini STM32F1 GND
  • SSD1306 128x64 SPI OLED GND
  • nRF52840 ProMicro GND
  • Arduino Pro Mini GND
  • USB Serial TTL GND
  • Si4463 Custom Breakout GND

• CS connected to Arduino Pro Mini A0

• MOSI connected to Arduino Pro Mini MOSI

• CLK connected to Arduino Pro Mini SCK

• MISO connected to Arduino Pro Mini MISO

Arduino Pro Mini

• VCC connected to:

  • Maple Mini STM32F1 Vcc
  • SD SDHC 3V3
  • Si4463 Custom Breakout Vcc

• GND connected to:

  • Maple Mini STM32F1 GND
  • SSD1306 128x64 SPI OLED GND
  • nRF52840 ProMicro GND
  • SD SDHC GND
  • USB Serial TTL GND
  • Si4463 Custom Breakout GND

• A5 connected to