ESP8266-01 WifiScan not working
You should provide a good power source for the VCC. One that can supply 170 mA for WiFi operations of esp8266. You should use the power regulator to supply 3.3 V to VCC and there is no reason to use other power source for the CH_PD pin. CH_PD pin is &quot;enable&quot; pin, it doesn't need a strong power supply.
IO 0 should be connected to ground only for upload, not for normal operation.