There are differing opinions about the accuracy and/or efficacy of those meters. I can't advise on the readings except to say that the soil is best kept moist, not wet, with breaks between waterings — if you've got clay, I wouldn't water daily. In high heat, maybe 2x a week, deep soak vs light and more frequent. I know you're coming into your usual hottest month so your fingers are the best guide and 3x a week might be necessary. Do not keep the soil soggy. I think I see mulch? If so, that's good.
