Transmitters, operating in the infrared range (infrared).
A set of two backlight modules, equipped with IR LEDs 850nm 3W. On the boards there are photoresistors that allow you to adjust the light depending on the brightness of the surrounding, the radiation angle is 100°.
IR transmitter from Grove, emitting light with a wavelength of 940 nm. It works with a supply voltage from 3.3 V to 5.0 V. Sensor provides a signal to a distance of 10 meters. The kit includes a cable adapted to Seeedstudio Base Shield v2.0.
Module with ESP8266 system and transmitter and receiver with IR control IR devices via wi-fi. Wi-fi module can be programmed to provide an interface between HTTP, MQTT, TCP, and devices controlled via IR. ESP8266 has 4 MB of flash memory, and a PCB antenna.