Abstract: An interphone includes a processor, and a microphone, a camera, a wireless communicating module, a speaker and a display panel electrically connected with the processor. The interphone further includes a brightness detecting device electrically connected with the processor. The brightness detecting device detects a brightness of outer environment. When the interphone is communicating with other interphones, the processor adjusts a brightness of the display panel according to the brightness of outer environment detected by the brightness detecting device. An interphone system and a method for adjusting a brightness of a display panel of an interphone are also provided.

Abstract: A weather monitoring system includes a plurality of weather stations located at different regions. Each weather station includes a processor; a power controller to provide power for the weather station; a sensor to detect weather conditions of the region where the weather station is, and transmit the weather condition to the processor; an emitter to transmit the weather conditions to other weather stations; a receiver to receive the weather conditions from the other weather stations; and a display device to display the weather conditions. A streetlamp system having the weather monitoring system is also provided.