On the ESP8266 ESP-01, CH_PD must be pulled HIGH at boot for the chip to work. A 10K resistor can be used for the pull-up.
Some variants of the ESP-01 module already have CH_PD in the HIGH state.
On the ESP8266 ESP-01, CH_PD must be pulled HIGH at boot for the chip to work. A 10K resistor can be used for the pull-up.
Some variants of the ESP-01 module already have CH_PD in the HIGH state.