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Temperature Humidity Sensor Module (DHT11) can measure temperature from 0°C to 50°C with ±2
Operating voltage range: 2–6V
WIFI Serial Module ESP8266 Adapter Board (3
SIM800L-ESP800L GSM / GPRS module supports quad-band GSM/GPRS network including SIM800L GPRS and SMS message data
TP4056 1A Li-Ion Battery Charging Board (Type c) 4023 Temperature Humidity Sensor Module (DHT11)Introduction : Since lithium batteries demand a special charging regime, and you must not charge them on a regular power source, you will need a charger like this one. Affordable, with integrated CC CV charging regime, definitely the easiest way to charge some lithium batteries. Input voltage is connectable via USB cables or separate terminals. In addition, this charger includes battery protection which means that your cell (18650 battery for example)