![]() It is important to connect a small (17cm wire with 433MHz) to the antenna pins on the transmit module (see figure). The rf modules usually have 3 pins, two for power supply and one for data / Arduino. But any LCD module with the standard LCD library will do the job. To make the receiver compact and independent of a computer, I used an LCD module which is available as a keypad shield. ![]() But it can be easily modified to use a lm35 sensor. But for simple uses, these are quite handy as they consume only one digital pin on the Arduino while the nrf modules use 5 pins.įor temperature measurements, I used a ds18b20 digital sensor in this article. The same principle can be used to make any of your sensors wireless.Ĭompared to nrf24l01 modules, these are unidirectional and needs slightly higher (starting at 5v) working voltages. In this article, we use inexpensive 433/315MHZ inexpensive rf modules to make wireless temperature sensors. A simple wireless temperature sensor for homemade weather station
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