antenna for RF-UM96

Wireless & IoT
1

I am doing an installation which involves logging data (color of the sky) on a building roof top, and transmitting that data to a sculpture at ground level (for playback at night). I am concerned about reliably receiving the data, and am thinking that signal strength is going to be the most important thing (yes/no)?

To this end I am considering using a yagi type directional antenna that is suppose to increase gain by 13dB. This is a 48" long monster, and I am wondering if the 10mW that the RF-UM96 outputs is enough to drive such an antenna? Is this over kill? Would a larger whip type antenna be sufficient?

The distance could be upward of 300 to 400m, hopefully I will be able to maintain line of sight, but this is unclear at the moment. Are there any tricks like bouncing the signal (430mHz) of other buildings?

All thoughts appreciated

Leigh

2

This may seem like a stupid question, but why not drop a cable down an elevator shaft? Is this sculpture a permanent installation?

3

This is not an option. A cable would have to have to cross streets and sidewalks to connect the sensor with the sculpture, and would not be permitted by the city. Would have been a nice simple solution though.