Check out this tech it works with a soil tester to provide real-time data and directions on farming a must have for £3.99.
https://docs.google.com/forms/d/1rxaC-FE7PWr9iWstWLkSPWh07eE LJwEvNi7JIJ7Eew8/prefill
Measurer here for £5.99:
https://www.wish.com/search/humidity%20and%20temperature% 20farm%20measurer/product/5dc4e2075d190a 0764d950fa?source=search&position=2
24 m