Circuit Documentation

Summary

The circuit in question appears to be a control and monitoring system, possibly for a home automation or industrial application. It includes a variety of components such as microcontrollers, I/O expanders, analog-to-digital converters (ADCs), resistors, relay modules, and power supply lines (Live, Neutral, and Ground). The microcontrollers are likely used for controlling the logic of the system, while the I/O expanders increase the number of I/O pins available for use. The ADC is used for converting analog signals to digital values that the microcontroller can process. The resistors are likely used for pull-up configurations on I2C lines or other signal conditioning. The relay module is used to control high-power devices. The power supply lines provide the necessary power to the components.

Component List

Microcontrollers

• Olimex ESP32-EVB: A microcontroller board based on the ESP32 chip, featuring Wi-Fi and Bluetooth connectivity, multiple GPIOs, and various communication interfaces.

I/O Expanders

• MCP23017: A 16-bit I/O expander with an I2C interface, providing additional GPIOs.

ADC

• Adafruit ADS1115 16Bit I2C ADC: A high precision, 16-bit analog-to-digital converter with an I2C interface.

Resistors

• Resistor: A passive component used to limit current or divide voltages. In this circuit, multiple 4700 Ohm resistors are used.

Relay Modules

• 8-channel relay: A module with 8 relays that can be controlled to switch high-power devices on and off.

Power Supply Lines

• Live: The live wire provides the supply voltage.
• Neutral: The neutral wire completes the electrical circuit.
• Ground (GND): The ground wire is a safety line that is connected to the earth.

Actuators

• Heating Actuator: A device used to control the heating system.

Sensors

• Magnet Contact: A sensor that detects the presence of a magnetic field, typically used for security systems such as door or window sensors.

Miscellaneous

• Wago Terminal (3-way): A connector used for easily connecting wires together.
• Evosta 3: A specific component, possibly a pump or valve, used in conjunction with the heating system.
• Thermostat: A device that regulates the temperature by controlling the heating system based on the temperature setpoint.

Wiring Details

Olimex ESP32-EVB

• Connected to I2C bus (SCL, SDA) along with pull-up resistors.
• Ground (GND) and 5V connected to corresponding power lines.
• Various GPIOs connected to relay module and heating actuators.

MCP23017 (I/O Expander)

• VDD connected to the positive power supply (Vcc).
• VSS connected to Ground (GND).
• SCL, SDA connected to I2C bus with pull-up resistors.
• RESET connected to a pull-up resistor.
• GPB0-GPB7 connected to the inputs of the 8-channel relay module.

Adafruit ADS1115 16Bit I2C ADC

• VDD connected to the positive power supply (Vcc).
• GND connected to Ground (GND).
• SCL, SDA connected to I2C bus.
• AIN0-AIN3 connected to resistors.

8-channel relay

• IN1-IN8 connected to MCP23017 GPB0-GPB7 respectively.
• VCC connected to the positive power supply (Vcc).
• GND connected to Ground (GND).
• NO (Normally Open) and COM (Common) pins connected to various Live lines and heating actuators.

Resistors

• All resistors are 4700 Ohms and are used in various parts of the circuit, including pull-up configurations and connections to the ADC.

Heating Actuators

• L (Live) connected to relay module outputs and Live power supply.
• N (Neutral) connected to Neutral power supply.

Magnet Contact

• Connected to the Evosta 3 and Wago Terminal.

Evosta 3

• Live and Neutral connected to corresponding power lines.
• GND connected to Ground (GND).

Thermostat

• Live and Neutral connected to corresponding power lines.
• Output connected to Wago Terminal.

Documented Code

No code was provided for the microcontrollers in the circuit. Typically, the code would be responsible for initializing and configuring the I/O pins, setting up communication interfaces (such as I2C), reading sensor data, controlling the relay module, and implementing the control logic for the actuators based on sensor inputs and user commands.