Forget Wi-Fi moisture sensors—this ESP32 project works offline and costs half as much

I’ve owned a lot of houseplants in my time and killed many of them. The biggest issue has always been knowing when to water them. Wi-Fi moisture sensors can help, but if you have a lot of plants, the cost can soon add up, and if your Wi-Fi goes down, they become useless. Using an ESP32, you can make a moisture sensor that works offline and is a fraction of the price.