Wanting to know the outside temperature, [Jamie Maloway] built his own temperature sensor that can be read with a Bluetooth device. Let’s take a tour of the hardware above from right to left.… ...

With its radio receiver and radio transmitter consuming just 0.85 mA and 2.1 mA, respectively, the GTI-ATM3330e Bluetooth module can extend battery life in a broad range of IoT applications. To assist ...

The wireless cooking temperature sensor device “NICK” using all-solid-state batteries (left), and the Maxell’s all-solid-state battery “PSB401010H” mounted on the circuit board (enlarged ...

The Pyros-3GT2-DWB from Farsens S.L., San Sebastián, Spain, is a battery free RFID sensor tag capable of transmitting a unique identifier and the associated temperature measurement data to a ...

They've built an extra-small (2 square millimeters) wireless temperature sensor that gets its power from the radio waves that make up its wireless network.