Researched a low cost, replaceable linux device for a new digital signage platform, based off a Raspberry Pi. The Raspberry Pi was only new at the time and didn't have the software required, so other hardware was used instead.

Changed to Arduino based, restricted it to non-display and relay control, proved web connectivity via ethernet board, expanded with a few more sensors and a web based configurator, and finalised an enclosure. Initial pcb design and fabrication, and assembly testing.

Based off a 555 chip with a few discrete components, using leftover enclosures from initial project.

Allow for more accurate timings, added wifi connectivity via ESP12F to send sensor data without the ESP32-Cam, created cloud app to send and receive data, initial pcb layout

Added bios-like functionality, added dedicated app chips, power finalisation, pcb finalisation and initial print

Added the idea of making this board and its power options the base for sub boards to give it much more capability.

Designed a number of sub boards for dedicated applications for the launch

Assembly order and component testing, to get costs and stability

With the device proven and costs worked out, fixed up a few issues within the firmware and got the SaaS working nicer