AutomaticGateOpeners

Automatic gate openers
Petrol is poured on the machine and set alight, burning it out so that the gate freewheels on the gear and is easily opened. Attach a temperture, vibration and ambient light sensor inside the gate-opener box. The temperature sensor will detect the heat from the burning box. Interface the circuits to RS485 - ["RS485"]. Or install a simple inrared beam inside the box which will be interrupted by the flames, but you won't know what interrupted the beams, only the temperature sensor and ambient light detector will indicate this.