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Reply To: Solar Radiation

Home Forums Environmental Sensors Solar Radiation Reply To: Solar Radiation

Shannon Hicks

The code I posted above is for when you use a ADS1115 16-bit ADC. If you’re using a standard Uno or Mega board, you’ll have to use the regular 10-bit ADC, unless you’re planning to use a separate ADS1115 breakout. But assuming you’re okay with the lower resolution of the 10-bit ADC, just use the standard analogRead command and then convert the result to voltage. And because the output of the SP-212 is 1mv = 1 PAR, the measured voltage (in millivolts) is the PAR. The 10-bit resolution of the ADC means you’ll get steps of around 5 PAR (4.89 actually).