Add Wi-Fi capability to non-connected devices.
General-purpose I/O. Pull LOW to enter programming mode; HIGH for normal run. RST: External reset. Active LOW. RX / GPIO 3: UART Data Receive. Also used as a general I/O. VCC: Power supply (3.3V ONLY). Power Requirements and Warnings
| Pin | Name | Function | |-----|------|-----------| | 1 | GND | Ground | | 2 | GPIO2 | I/O (high on boot) | | 3 | GPIO0 | Boot mode (LOW = flash, HIGH = run) | | 4 | RXD | UART RX (3.3V logic) | | 5 | TXD | UART TX | | 6 | CH_PD | Chip enable (HIGH to operate) | | 7 | RST | Reset (active LOW) | | 8 | VCC | 3.3V input | esp 01 datasheet
L106 32-bit RISC microprocessor core based on the Tensilica Xtensa Diamond Standard 106Micro. Operating Voltage: 3.0V to 3.6V (3.3V is standard). Operating Current: Average 80mA. Flash Memory: 512KB to 1MB (varies by manufacturer). Wi-Fi Protocols: 802.11 b/g/n. Frequency Range: 2.4 GHz – 2.5 GHz. Output Power: +20dBm in 802.11b mode. ESP-01 Pinout Diagram
To program the ESP-01, you must set the state of specific pins before powering on or resetting the device: GPIO 0 must be tied to GND. Normal Run Mode: GPIO 0 must be floating or tied to VCC. Add Wi-Fi capability to non-connected devices
Search “ESP-01 datasheet PDF” from Espressif or AI-Thinker. Many hobbyist sites have it, but verify the document date (2015-2016 is typical).
| Parameter | Value | | :--- | :--- | | | 14.3 mm x 24.8 mm | | Flash Memory | 512KB / 1MB (External SPI Flash) | | Operating Temp | -40°C to +85°C | | Package Type | 2x4 pitch 2.54 mm header | | ADC | 1 Channel (10-bit) | | GPIOs | 2 Usable GPIOs (GPIO0, GPIO2) + TX/RX | RST: External reset
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