# Calibration Flash

This example shows how to flash calibration data of version 6 (gen2 calibration data) to the device.

## Similar samples:

 * [Calibration Flash v5](https://docs.luxonis.com/software/depthai/examples/calibration_flash_v5.md)
 * [Calibration Reader](https://docs.luxonis.com/software/depthai/examples/calibration_reader.md)
 * [Calibration Load](https://docs.luxonis.com/software/depthai/examples/calibration_load.md)

## Demo

Example script output

```bash
~/depthai-python/examples$ python3 Calibration/calibration_flash.py
    Calibration Data on the device is backed up at:
    /home/erik/Luxonis/depthai-python/examples/Calibration/depthai_calib_backup.json
    # Calibration Flash Successful
```

## Setup

Please run the [install script](https://github.com/luxonis/depthai-python/blob/main/examples/install_requirements.py) to download
all required dependencies. Please note that this script must be ran from git context, so you have to download the
[depthai-python](https://github.com/luxonis/depthai-python) repository first and then run the script

```bash
git clone https://github.com/luxonis/depthai-python.git
cd depthai-python/examples
python3 install_requirements.py
```

For additional information, please follow the [installation guide](https://docs.luxonis.com/software/depthai/manual-install.md).

## Source code

#### Python

```python
#!/usr/bin/env python3

from pathlib import Path
import depthai as dai
import argparse

calibJsonFile = str((Path(__file__).parent / Path('../models/depthai_calib.json')).resolve().absolute())
calibBackUpFile = str((Path(__file__).parent / Path('depthai_calib_backup.json')).resolve().absolute())

parser = argparse.ArgumentParser()
parser.add_argument('calibJsonFile', nargs='?', help="Path to calibration file in json", default=calibJsonFile)
args = parser.parse_args()

# Connect device
with dai.Device(dai.OpenVINO.VERSION_UNIVERSAL, dai.UsbSpeed.HIGH) as device:

    deviceCalib = device.readCalibration()
    deviceCalib.eepromToJsonFile(calibBackUpFile)
    print("Calibration Data on the device is backed up at:")
    print(calibBackUpFile)
    calibData = dai.CalibrationHandler(args.calibJsonFile)

    try:
        device.flashCalibration2(calibData)
        print('Successfully flashed calibration')
    except Exception as ex:
        print(f'Failed flashing calibration: {ex}')
```

#### C++

```cpp
#include <cstdio>
#include <iostream>
#include <string>

// Includes common necessary includes for development using depthai library
#include "depthai/depthai.hpp"

int main(int argc, char** argv) {
    std::string calibJsonFile(CALIB_PATH);
    std::string calibBackUpFile("depthai_calib_backup.json");
    if(argc > 1) {
        calibJsonFile = std::string(argv[1]);
    }

    // Connect device
    dai::Device device(dai::OpenVINO::VERSION_UNIVERSAL, dai::UsbSpeed::HIGH);

    dai::CalibrationHandler deviceCalib = device.readCalibration();
    deviceCalib.eepromToJsonFile(calibBackUpFile);
    std::cout << "Calibration Data on the device is backed up at:" << calibBackUpFile << std::endl;
    dai::CalibrationHandler calibData(calibJsonFile);

    try {
        device.flashCalibration2(calibData);
        std::cout << "Successfully flashed calibration" << std::endl;
    } catch(const std::exception& ex) {
        std::cout << "Failed flashing calibration: " << ex.what() << std::endl;
    }

    return 0;
}
```

### Need assistance?

Head over to [Discussion Forum](https://discuss.luxonis.com/) for technical support or any other questions you might have.