Circuit Documentation

Summary

This document provides a detailed overview of a circuit that integrates an Arduino UNO, a Bluetooth module HM-10, a SIM 800L module, an RFID-RC522 module, and a Power Supply. The circuit is designed to facilitate communication between these components, with the Arduino UNO acting as the central microcontroller.

Component List

Arduino UNO

• Description: A microcontroller board based on the ATmega328P.
• Pins: UNUSED, IOREF, Reset, 3.3V, 5V, GND, Vin, A0, A1, A2, A3, A4, A5, SCL, SDA, AREF, D13, D12, D11, D10, D9, D8, D7, D6, D5, D4, D3, D2, D1, D0

Bluetooth module HM-10

• Description: A Bluetooth Low Energy (BLE) module.
• Pins: BRK, RX, TX, GND, VCC, State

SIM 800L

• Description: A GSM/GPRS module for communication over cellular networks.
• Pins: NFT, RING, VCC, DTR, RST, MIC +, RXD, MIC-, TXD, SPK+, GND, SPK-

Power Supply

• Description: Provides power to the circuit.
• Pins: +, -

RFID-RC522

• Description: A low-cost RFID module for reading and writing RFID tags.
• Pins: VCC (3.3V), RST, GND, IRQ, MISO, MOSI, SCK, SDA

Wiring Details

Arduino UNO

• 5V: Connected to VCC of SIM 800L, VCC of Bluetooth module HM-10, and + of Power Supply.
• GND: Connected to GND of SIM 800L, GND of Bluetooth module HM-10, - of Power Supply, and GND of RFID-RC522.
• D13: Connected to SCK of RFID-RC522.
• D12: Connected to MISO of RFID-RC522.
• D11: Connected to MOSI of RFID-RC522.
• D10: Connected to SDA of RFID-RC522.
• D9: Connected to RST of RFID-RC522.
• D3: Connected to TXD of SIM 800L and RX of Bluetooth module HM-10.
• D2: Connected to RXD of SIM 800L and TX of Bluetooth module HM-10.

Bluetooth module HM-10

• VCC: Connected to 5V of Arduino UNO and + of Power Supply.
• GND: Connected to GND of Arduino UNO, - of Power Supply, and GND of SIM 800L.
• RX: Connected to D3 of Arduino UNO and TXD of SIM 800L.
• TX: Connected to D2 of Arduino UNO and RXD of SIM 800L.

SIM 800L

• VCC: Connected to 5V of Arduino UNO and + of Power Supply.
• GND: Connected to GND of Arduino UNO, - of Power Supply, and GND of Bluetooth module HM-10.
• TXD: Connected to D3 of Arduino UNO and RX of Bluetooth module HM-10.
• RXD: Connected to D2 of Arduino UNO and TX of Bluetooth module HM-10.

Power Supply

• +: Connected to 5V of Arduino UNO, VCC of SIM 800L, and VCC of Bluetooth module HM-10.
• -: Connected to GND of Arduino UNO, GND of SIM 800L, GND of Bluetooth module HM-10, and GND of RFID-RC522.

RFID-RC522

• VCC (3.3V): Not connected in this circuit.
• GND: Connected to GND of Arduino UNO, - of Power Supply, and GND of Bluetooth module HM-10.
• SCK: Connected to D13 of Arduino UNO.
• MISO: Connected to D12 of Arduino UNO.
• MOSI: Connected to D11 of Arduino UNO.
• SDA: Connected to D10 of Arduino UNO.
• RST: Connected to D9 of Arduino UNO.

Documented Code

Arduino UNO Code

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

}

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

}

This code initializes the Arduino UNO but does not contain any specific functionality. It serves as a template for further development.