Description Copy links for more details https github com LilyGO higrowopenIf you need to shell please buy it from Product ID 1609381This capacitive soil moisture sensor differs from most of the resistive sensors on the market using capacitive sensing principleto detect soil moisture It avoids the problem that the resistance sensor is easy to corrode and greatly prolongs its working life Size 193 5 29 4mmComparison before and after the soil test module G301 upgrade Upgrade time April 16 2020 1 Changed from the original ESP32 module to a separate ESP32 chip 2 The lithium battery was changed from the original 18650 to a 500MA lithium battery battery not includes 3 The charging IC was changed from the original TP5400 to TP4054 4 Change the original MICR carrier to TYPE C 5 The original normal power supply mode is changed to the key sleep wake up mode or the customer can make a timed wake up 6 The size of the board is 45mm smaller than the previous length and the width is increased by 2 54MM 7 Change from the original DHT12 temperature and humidity sensor to DHT11Add part 1 Added sleep button wake up function IO35 2 Added test soil salinity function CD4060BM TL034IDR 3 Added light BH1750FVI strength test4 Reserved external device expansion single bus serial port IIC 21 22 Advantage The battery life is much longer than before In the case of testing moisture you can test the soil s salt and photosynthetic absorption reasonable fertilization