Make sure your transformer low voltage side output is 16 Volt by testing with a volt meter. Set volt meter to read A/C voltage. Voltage should read between 18 – 22 volts A/C on the low voltage side of the transformer when chime is NOT working. If volt meter reads below 18 volts when the chime is NOT working or below 16 volts when the chime is working/playing, replace the transformer with a 16V 10VA transformer.
If you have the correct transformer and between 12 – 24V AC at the doorbell location and dbell keeps connecting/disconnecting – Wi-Fi signal strength is weak.
Wi-Fi signal strength:
The performance of a Wi-Fi wireless network connection depends greatly on radio signal strength. Distance between the wireless access point or Router and dbell, the signal strength in each direction determines the data rate available on that link, not the download/upload speed you have. Wi-Fi signal strength and your upload/download speed are completely two different parameters. You can have highest upload/download speed but if your Wi-Fi signal strength is weak, meaning router or WAP cannot simply broadcast a good WiFi signal, it’s probably a good idea to consider employing Wi-Fi extender.
signal is usually measured in dBm. dBm is the power ratio in decibels of the radio power per one milliwatt. A signal of -60dBm is OK, and -80dBm is poor
How to check Wi-Fi signal strength:
Any mobile device that is internet capable can show you the strength of the Wi-Fi network in range.
On an iPhone, in the Settings app, just go to Wi-Fi to see not only the Wi-Fi strength of the network you’re on but also the signal strength of any network within the range.
On an Android phone/tablet or any other smartphone or tablet – just look under a Settings, Wi-Fi, or Network menu.
Best option is to download a free app like Wifi Analyzer for Android, which shows the Wi-Fi strength visually.