15-11-2018, 01:16
Its all on the code... 
Another hint, before placing all the guilt on the sensor...
If possible try to measure the voltage at ADC0 input, then verify if the raw reading from ADC0 is consistent with the voltage you are reading on the multimeter using this formula:
voltage (in Volts) = (adc0_reading * 1.1 / 1024)
If the values don't agree for a significant amount, there is a possibility that the internal voltage reference of that particular Arduino Nano isn't accurate (by specs they can be between 1.00V -- 1.20V) which obviously have impact on the readings.
Think now you have all the bits of what is involved.
If I were you, I would just try to calibrate the sensor by comparing the readings with other sensors in the vicinity, once it has the coverage you want to use, then it is easier to play with only the value to assign to the UV_Transmission.
Another hint, before placing all the guilt on the sensor...
If possible try to measure the voltage at ADC0 input, then verify if the raw reading from ADC0 is consistent with the voltage you are reading on the multimeter using this formula:
voltage (in Volts) = (adc0_reading * 1.1 / 1024)
If the values don't agree for a significant amount, there is a possibility that the internal voltage reference of that particular Arduino Nano isn't accurate (by specs they can be between 1.00V -- 1.20V) which obviously have impact on the readings.
Think now you have all the bits of what is involved.
If I were you, I would just try to calibrate the sensor by comparing the readings with other sensors in the vicinity, once it has the coverage you want to use, then it is easier to play with only the value to assign to the UV_Transmission.