I would be interested in any application that crosses many layers. If you create an IoT device you need: + bootloader + radio stack + HAL + custom code laye

I would be interested in any application that crosses many layers. If you create an IoT device you need: + bootloader + radio stack + HAL + custom code layer, say Arduino + communication layer + mesh hub (+ mesh communication layer) + sink code on mobile (bridge, no access to encrypted data) + local communication on mobile (low latency) + cloud + remote access + interfaces, mobile/dashboards It has also a lot of crosscutting concerns: latency, scalability (keep it local stupid), bandwidth, security, safety. Till out in the field: how to remotely define if it is hardware or software to reduce number of devices that gets returned.