I have a Tapo D235. It was connected to the Wi-Fi for the past 4 months and working fine. Then the battery needed a recharge. It was recharged. Since then I cannot reconnect it to the Wi-Fi. After it is powered on the doorbell button flashes red slowly. I pressed the sync/reset button for 30 seconds. There was no indication that it reset. The button continued to flash red slowly.  My phone is not detecting a Wi-Fi ssid from the device.