This Arduino grow-op monitoring solution helps to solve those problems. ... The board is an Uno and has an SD card shield with a DHT22 temperature sensor plus a soil moisture sensor.

Arduino Hacks 3036 Articles . Too Hot For Fido? Get Alerted! June 27, 2015 by Mike Szczys 29 Comments ... It’s simply an Arduino, DHT22 temp/humidity probe, and a SIM900 GSM modem.