DFRobot RS485 Shield for Arduino | DFR0259 gprs It can measure absolute distances

It can measure absolute distances up to 2m in less than 30ms

20 pin Through Hole footprint (100 mils pitch)

Mobile phones and other battery operated devices

USB chip: CH9102F

DFRobot RS485 Shield for Arduino | DFR0259 gprs It can measure absolute distancesDescription: RS485 is an industrial standard for long distance, anti interference, and reliable communication. The Arduino RS485 shield, specially designed for the Arduino Uno board. It converts UART Serial protocol to the RS485 protocol. This RS485 board allows Arduino talk to industrial devices. In contrast to RS 422, which has a single driver circuit that cannot be switched off, RS 485 drivers use three state logic allowing individual transmitters