Electronic devices, systems, and methods are disclosed for remote and/or automated monitoring of temperature, humidity, or other factors in a building during a remediation project, such as after a flood or mold infestation. These devices comprise sensors devices that can be distributed around a room or building, for transmitting data to a processor such as a laptop computer. Using telephone, cell phone, or internet connections, the processor can transmit compiled data to a website or remote computer, for analysis and use by a project supervisor. Sensor-switch devices also are disclosed for turning fans, dehumidifiers, or other equipment on or off. Using a telephone, cell phone, or internet connnection, a project supervisor at any location can download information, obtain current status information, and turn equipment on or off as needed.