When using an ESP8266 ESP-01, it is recommended add a pull up resistor to set CH_PD to HIGH, as some specimen do not have this built in. You can use a 10K resistor for this purpose.
When using an ESP8266 ESP-01, it is recommended add a pull up resistor to set CH_PD to HIGH, as some specimen do not have this built in. You can use a 10K resistor for this purpose.