Nutrient dosing system - Hydroponics EC (Arduino) (youtube)
https://www.google.com/search?sxsrf=ALeKk02N4aQfJxa9l5JibTISwSyRs0-jFg:1609682256943&source=univ&tbm=isch&q=Arduino+tds+Controller+For+Pump&sa=X&ved=2ahUKEwiy7oDZ9f_tAhVn73MBHdZuCYAQjJkEegQIAxAB
Arduino tds Controller For Pump (google)
https://wp.josh.com/2014/06/23/no-external-pull-up-needed-for-ds18b20-temp-sensor/
how to control relay tds sensor adruino
https://docs.google.com/spreadsheets/d/1beWyazJBGaVfuJpYM5ad9d1ukKdUmuFr1WRPx34r6Ek/edit#gid=0
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