nRF51822 Bluetooth BLE 4.0 2.4GHz Wireless Module 1.2E It is used for temperature

It is used for temperature control

Its Light Weight

This 2 Channel 5 Volt Relay Module

Maximum RMS Bridge Input Voltage

It is possible to isolate each input and output from the system ground

nRF51822 Bluetooth BLE 4.0 2.4GHz Wireless Module 1.2E It is used for temperatureThe Core51822 is a Bluetooth 4. 0 Low Energy 2. 4GHz RF SoC based wireless module designed for ULP (Ultra Low Power) wireless Applications. If you have a custom PCB design and want to add some Bluetooth Low Energy, this module is small and simple to use. Features Low energy 128 bit AES hardware encryption 8 bit ADC Applications Wearable devices Mobile phone accessories RFID labels Industrial control Home appliances Specification Model NRF51822 Version