ESP-01 Module is basically a low-cost esp8266 module, with built-in WIFI. It was created as an Arduino WIFI module but it can also be programmed to work as standalone. Although this module is cheap but working with it is a little difficult. As it is not a breadboard-friendly module it would be a bad choice for a beginner.Less I/O pins make it a little difficult to use in standalone mode in projects. It has 8 pins.
- Pin1: Ground Pin
- Pin2: GPIO2 Pin
- Pin3: GPIO0 Pin
- Pin4: RXD is UART data receive pin.
- Pin5: Vcc is for powering the Module. Only 3.3V power is required.
- Pin6: RST is for external reset. It's active Low in nature.
- Pin7: CH_PD is an active-high pin for Chip enable.
- Pin8: TXD is UART data send pin.
Programming this module is a little difficult as it does not have any type of connector. Although programming can be done using Jumper Wires, NodeMCU and Arduino IDE.
Get the Datasheet from the link below:
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