Just use old phones from eBay :). More like 50 Euros, but still rather cheap and powerful enough for any IoT use. Reminds me of that guy who used an iPad for a

Just use old phones from eBay :). More like 50 Euros, but still rather cheap and powerful enough for any IoT use. Reminds me of that guy who used an iPad for a wall mounted information panel (weather, transport time, traffic conditions, some other stuff). Pretty cool.