![]() We recommend putting a constantly powered (5V) lightbox back behind the imaging plane and working in a dark room to calibrate the aperture consistently. It is important that the testing rig places the camera at the same focal distance as it will be in the assembled device. Camera testing and callibration – The system turns the camera on for a few seconds at a time.If, whilst the system is waiting, you push the button, but nothing happens, check the button is properly wired. If you have pushed the button before (e.g. by accident), the system will say so and continue. Push button – the system waits for the push button to be activated.When testing with a lithium battery, it should be lower. When testing with USB (5V), the value should be near 1000. Battery level – an internal analog sensor to read the voltage of the input power.It may randomly fail at times – if after retesting several times DHT it keeps failing, check wiring and try swapping with another probe. Reading DHT – should output sensible values of temperature and humidity.If not, check the wiring of the light box, or retest the light box ![]() Blinking flash – The lightbox should blink 10 times.If not, check the coin cell on Sticky Pi Hat – if the cell is missing or drained, the clock will fail to keep time. Time – When testing a device for the first time, it should be set shortly after. ![]()
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