Bluecollar Arduino Controller

This Arduino sketch serves as a versatile controller, performing two primary functions:

1. I2C Peripheral Emulation: It emulates a power supply unit, responding to I2C commands as a slave device.
2. Current Sensing: It reads analog data from current sensors, converts it to Amperage, and outputs the values to the serial monitor.

Features

• I2C Slave Emulation: Emulates an I2C device at address 0x58.
• Command Processing: Responds to a variety of I2C commands to simulate a power supply's status and readings.
• Analog Current Measurement: Reads from three analog pins (A0, A1, A2) to monitor current.
• Serial Output: Prints the measured current values to the serial port for debugging and monitoring.

Hardware Requirements

• An Arduino-compatible board (e.g., Arduino Uno, Nano).
• I2C bus connection for communication with a master device.
• Up to three analog current sensors connected to pins A0, A1, and A2.

Software Breakdown

main.cpp

This is the main file for the sketch.

• setup():

  • Initializes serial communication at 9600 baud.
  • Initializes the I2C bus with slave address 0x58.
  • Registers the requestEvent and receiveEvent handlers for I2C communication.

• loop():

  • Continuously reads analog values from pins A0, A1, A2.
  • Converts the raw analog-to-digital converter (ADC) readings into Amperage.
  • Prints the current values for each sensor to the serial monitor.
  • Includes a 500ms delay to control the reading frequency.

• convert_voltage_in(int reading):

  • Takes a raw ADC reading as input.
  • Converts the reading to a voltage value based on the system's VOLTAGE (3.3V).
  • Calculates the current in Amps based on the sensor's characteristics.

• receiveEvent(int byteCount):

  • This function is called whenever the I2C master sends data to this slave device.
  • It reads the incoming byte, which is treated as a command code for the requestEvent handler.

• requestEvent():

  • This function is called whenever the I2C master requests data from this slave device.
  • It uses a switch statement to check the last command code received via receiveEvent.
  • Based on the command, it sends back predefined data, emulating the behavior of a power supply. This includes responses for operation status, voltage/current readings, manufacturer information, and more.

Usage

1. Hardware Setup:

   • Connect your Arduino board to your computer.
   • Connect the I2C master to the SDA and SCL pins of your Arduino.
   • Connect your analog current sensors to pins A0, A1, and A2.

2. Flashing the Sketch:

   • Open the main.cpp file in the Arduino IDE or your preferred editor.
   • Select the correct board and port.
   • Upload the sketch to your Arduino.

3. Monitoring:

   • Open the Serial Monitor in the Arduino IDE.
   • Set the baud rate to 9600.
   • You will see the current readings from the connected sensors printed to the monitor.

4. I2C Communication:

   • Your I2C master device can now communicate with the Arduino at address 0x58.
   • To read data, the master should first write a single command byte (e.g., 0x8B to read VOUT) and then immediately request data from the slave.