In this research work, the development of an electronic device that allows reading the temperature, heart rate, and location of a person, and send this data by a text message to a smartphone using a mobile network is proposed. The proposed monitoring device uses sensors that help us detect different types of signals which are translated into human language using microcontrollers, electronics, and various types of programming processes to develop functions to obtain data. As a result, the device will send a text message only if the readings return a parameter different from the normal ranges or when the wearer of the device presses a help button. This will send text messages to the phone number linked to a patient or a patient's relative.