NEW Rain Bird ESP-TM2-4 Station LNK WiFi Irrigation System Outdoor Controller Timer. The ESP-TM2 irrigation controller is the perfect option for basic residential solutions. Building upon Rain Bird’s legacy of The Intelligent Use of Water, this controller offers simple water saving features that you will actually use. With the flexibility of 3 programs and 4 start times available per program, you can tailor your watering schedule to your landscape’s needs. The ESP-TM2 provides the Extra Simple Programming interface you are familiar with in a controller that is built to last! Best of all, you can upgrade the ESP-TM2 into a WiFi-enabled controller by simply installing a new LNK WiFi Module, without having to replace the entire unit. See all photos, text message is better, see my other adds, thank you.