Have you had an entry sensor on your SimpliSafe security system have trouble communicating with the base station? Hearing those dreaded words from your base station “Entry Sensor Not Responding” when you arm or disarm your system can make you question your other sensors. I had the same issue on my system with just one location. When I researched I did not find any signal boosters or extenders for SimpliSafe systems. What I did find was a fellow on Etsy who adds an antenna wire to the contact sensor and it supposedly increases the signal. I bought one and voila, it worked. I go into more detail in my video. Check it out.
I bought it from Smart Home Hacks on Etsy.
Their link is https://www.etsy.com/shop/SmartHomeHacks?ref=shop-header-name&listing_id=1725014925&from_page=listing