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4GHz Transmitter & Receiver
The Mega2560 R3 board features a 1
It is important that the microcontroller share ground with the relay board along with other control signals else it will not able to control the relay
can be read directly through one of the digital input/output pins of a microcontroller
Accurate positioning
DHT22 Humidity and Temperature Sensor Module (AM2302) Boards Beagle Bone 4GHz Transmitter & ReceiverDHT22 Humidity and Temperature Sensor The DHT22 Sensor Module is a basic, low cost digital temperature and humidity sensor. It uses a capacitive humidity sensor and a thermistor to measure the surrounding air and spits out a digital signal on the data pin (no analog input pins are needed). It's fairly simple to use but requires careful timing to grab data. The only real downside of this sensor is you can only get new data from it once every 2 seconds,
US$ 48.00
US$ 1950.00
US$ 18.84
US$ 13.94