I need some ideas to get my mailbox sensor up and running. I mounted a magnetic contact sensor in the box and wired the module lower down on the post in a plastic box so that it was protected from the weather. It was working for a few days, but seems like the mail truck blocks the signal. When it was mounted in the mailbox it never worked, so I used the wire contact terminals to route the transmitter lower on the pole.
As you can see in a “rural delivery” route the boxes are across the street. The distance from the nearest module is about 75 feet LOS. The modules are in that planter, one for a fountain and one for landscape lighting.
Any ideas to improve the reliability so I get a mail is delivered message. Originally it was working when tested without a obstruction in front blocking the signal.