I would like to make a wireless switch to control a water pump. There would be a transmitter connected to a float switch in the water tank, and a receiver to control a well pump a few hundred feet/meters away. I have seen solutions such as https://www.adafruit.com/product/1096 but they use a handheld fob transmitter and the range is too short. Where can I find a transmitter that is on a circuit board instead of a handheld fob? Thanks!
When you say “few hundred feet/meters away” - which is it? Feet or meters? (they are actually quite different)
This place has stuff in the 150 - 200 m range:
And they have devices on circuit boards - just browse the site a bit.
http://electronics-diy.com/product_deta … =4-Channel 433MHz Wireless RF Remote Control (Transmitter + Receiver)