Mlx90614 Proteus Library

You cannot manually turn a knob on the MLX90614 symbol, but you can use the Proteus VSM Studio or DC Generator via the SPI or I2C debugger. Some advanced libraries include a thermal slider. If yours does not:

Even with the library installed, you may encounter issues.

| Symptom | Likely Cause | Solution | | :--- | :--- | :--- | | "No model specified" | The .HEX file path is broken | Re-link the file; ensure paths have no spaces. | | Reads always -273.15 | The I2C pointer register not set | Verify endTransmission(false) for repeated start. | | Simulation crashes on start | Library compiled for older Proteus (v7 vs v8) | Use a HEX to COFF converter or find a v8-compatible version. | | No SDA/SCL activity | Pull-ups missing | Add 10k resistors from SDA/SCL to VDD in schematic. | | Address conflict | Another device at 0x5A | Change one device's address in properties or disconnect. |

In the simulation environment, the MLX90614 model typically allows the user to edit properties. Double-clicking the sensor component often reveals an "Edit Properties" dialog where a static temperature value can be entered for simulation purposes, or in advanced models, a dynamic voltage input may represent temperature.

Use the MLX90614_Proteus Arduino project (available on GitHub) to generate the .HEX file yourself if you have an actual sensor. mlx90614 proteus library

This code snippet illustrates reading the object temperature register.

#include <Wire.h>
#define MLX90614_ADDR 0x5A
#define MLX90614_OBJ_TEMP 0x07
void setup() 
Serial.begin(9600);
Wire.begin();

void loop() 
float temp = readTemperature();
Serial.print("Object Temperature: ");
Serial.print(temp);
Serial.println(" C");
delay(1000);
 You cannot manually turn a knob on the
float readTemperature() 
int16_t rawTemp;
Wire.beginTransmission(MLX90614_ADDR);
Wire.write(MLX90614_OBJ_TEMP);
Wire.endTransmission(false);
Wire.requestFrom(MLX90614_ADDR, 3);
if (Wire.available() >= 3)  low;
// Convert to Celsius
// Formula: Temp = (rawValue * 0.02) - 273.15
return (rawTemp * 0.02) - 273.15;
 This code snippet illustrates reading the object temperature

return NAN;

If the library loads but never responds (always NACK):

Contrary to popular belief, Proteus does not automatically simulate every sensor on the market. The MLX90614 Proteus Library is a third-party SPICE model combined with a graphical component. It mimics the electrical behavior of the real sensor.