See the above projects for how to program the ESP-01 using these hardware options. Instead of a USB to TTL 3V3 Serial Cable, it is also possible to program the ESP-01 using an Arduino UNO, usingthis circuit, but don't use the UNO 3V3 power pin as the ESP-01's power supply it is...
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The power supply can be 3,3v or 5V and the serial communication is TTL can be 5V. This means that it can be done in a secure connection with Arduino boards and other 3,3v as esp8266. This module has four operation modes. The most basic mode is the normal mode for simple communicatio...