Abstract: Embodiments of the present invention provide wireless control devices that operate in-field wirelessly without removable batteries, have power self-harvesting components, and can be wirelessly programmed over long ranges without interfering with the normal operation of the control devices. Only control devices that have sufficient power available to perform a reprogram cycle (and can function normally until a next power harvest cycle) are selected. Control devices can be selected for wireless reprogramming based on the upcoming functions to be performed by the control device, the amount of energy stored in the control device, the rate of power generation of a solar panel of the control device, and current and upcoming weather conditions, etc. The wireless programming can include updating a firmware of the control device, a bootloader of the control device, and an application program image.