Design simple Arduino modules (schematics+Layout+firmware)

We have many simple modules to design like temperature sensor or LED drivers. For each module, you must select the key components and produce schematics and layout in Altium. You must also provide a basic Arduino firmware for basic interactions with the module. The jobs will be awarded on a per module basis but ideally the same person would end up making most of them. You must be experienced with Arduino and Altium.