Hi I am Sean from singapore. Just would like to let everyone know some significant differences in how we manage chemical levels in pools here as compared to other countries, especially Western nations.
1) We don't measure CYA levels (or perhaps use CYA in our pools)
2) We measure Chlorine in ppm, rather than using ORP readings.
Hence I am building a prototype auto dosing system powered by Raspberry Pi for a client. My sensors are purchased from Atlas Scientific, which means having an ORP Probe. This is my first time coding in 4 years, hence I would like to know whether anyone has coded conversions from ORP readings to free chlorine (in ppm).
Otherwise, I am stuck with using the ORP conversion charts and developing an algorithm to understand the trend of chemical levels in pools over time.
Looking forward to your constructive feedback.