Total posts : 45366
An after thought that I forgot to post. I have read conflicting information about the current requirements of the 900 MHz modules but data I measured gave 17 mA at 13 volts. These operate over a wide voltage range so solar or battery operation is feasible. Both T and R have a “sleep” mode where the current is microamps. It would be more involved but the receiver could be wired to a simple timer and control circuit which would periodically wake it up to check for a signal as indicated by the RSSI output. This would cause the receiver to be on at higher current only when a signal is detected, functioning as a pseudo on/off remote controlled switch. With the low current drain this may not be needed but it is a neat option.