This is a prototype unit for the repeater system I would like to implement. It is powered by a 6 watt solar panel charging 4 18650 lithium ion cells through a tp4056 controller. The microcontroller is a Lora32u4 which combines an Atmel 32u4 controller with a Semtech sx1276 Lora module. The body is a combination of a waterproof box with some 3d printed PETG elements and folded stainless steel flat stock. The antenna is a 1/4 wave ground plane monopole.