Circuit Documentation

Summary

This circuit integrates a variety of components to achieve a complex functionality that likely involves wireless communication, GPS tracking, and sensing capabilities. The core of the circuit is an Arduino Nano, which controls a RFM95 LoRa transceiver module for long-range communication, a SIM800L module for GSM cellular connectivity, a GPS NEO 6M module for location tracking, and an inductive sensor for proximity or metal detection.

Component List

Arduino Nano

• Microcontroller board based on the ATmega328P
• It has a variety of digital and analog I/O pins and is used as the main controller in this circuit.

RFM95

• A LoRa transceiver module capable of long-range communication
• It interfaces with the Arduino Nano for wireless data transmission.

GPS NEO 6M

• A GPS module that provides location data
• It communicates with the Arduino Nano via serial connection.

SIM800L

• A GSM cellular module that allows for SMS, GPRS, and voice communication
• It is connected to the Arduino Nano for cellular network interactions.

Inductive Sensor

• A sensor that detects the presence of metallic objects without contact
• It is connected to the Arduino Nano and is likely used for proximity sensing.

Wiring Details

Arduino Nano

• D4 connected to RFM95 DIO2
• D3 connected to RFM95 DIO1
• D2 connected to RFM95 DIO0
• 3V3 connected to RFM95 3.3V
• GND connected to RFM95 GND, SIM800L GND, Inductive Sensor blue (GND), and GPS NEO 6M GND
• D12 connected to RFM95 MISO
• D11 connected to RFM95 MOSI
• D13 connected to RFM95 SCK
• D10 connected to RFM95 NSS
• D9 connected to RFM95 RESET
• D8 connected to SIM800L RXD
• D7 connected to SIM800L TXD
• D6 connected to SIM800L RST
• RX0 connected to GPS NEO 6M TX
• TX1 connected to GPS NEO 6M RX
• A0 connected to Inductive Sensor black
• 5V connected to Inductive Sensor red (VCC), SIM800L VCC, and GPS NEO 6M VCC

RFM95

• Connected to Arduino Nano as detailed above.

GPS NEO 6M

• TX connected to Arduino Nano RX0
• RX connected to Arduino Nano TX1
• GND connected to Arduino Nano GND
• VCC connected to Arduino Nano 5V

SIM800L

• RXD connected to Arduino Nano D8
• TXD connected to Arduino Nano D7
• RST connected to Arduino Nano D6
• GND connected to Arduino Nano GND
• VCC connected to Arduino Nano 5V

Inductive Sensor

• black connected to Arduino Nano A0
• blue connected to Arduino Nano GND
• red connected to Arduino Nano 5V

Documented Code

No code has been provided for the microcontrollers in the circuit. To fully utilize the hardware, embedded code should be written and uploaded to the Arduino Nano. The code should handle the initialization and communication with the RFM95, SIM800L, GPS NEO 6M modules, and read the state of the inductive sensor. It should also include routines for handling data transmission, reception, GPS data parsing, cellular network operations, and sensor data processing.

Please provide the code for the microcontrollers to complete this section of the documentation.