Esp8266 Esp-01 Datasheet -
While the internal ESP8266EX chip has 32 pins (QFN package), the ESP-01 module breaks out only the most essential pins for basic serial communication and GPIO control.
| Issue | Detail | |-------|--------| | Few usable GPIOs | Only 2–4 available after UART and boot strapping | | No USB | Requires external FTDI/programmer | | Fragile power | Voltage ripple > 300 mV can cause reset | | Antenna sensitivity | PCB antenna needs clearance from metal | | No deep-sleep wakeup | GPIO16 missing; can only wake via external RST pulse | | 3.3V-only logic | Not 5V tolerant | esp8266 esp-01 datasheet
| GPIO0 | GPIO2 | CH_PD | Mode | |-------|-------|-------|------| | 0 | 1 | 1 | UART download (flash firmware) | | 1 | 1 | 1 | Boot from flash (normal run) | | X | X | 0 | Chip disabled | While the internal ESP8266EX chip has 32 pins
512 KB (Original Blue Version) or 1 MB/4 MB (ESP-01S/Black Version). Antenna: On-board PCB Trace antenna. The ESP8266 ESP-01 is a popular and versatile
The ESP8266 ESP-01 is a popular and versatile Wi-Fi module that has revolutionized the world of IoT (Internet of Things) and electronics. As a low-cost, low-power, and highly integrated module, it has become a go-to choice for hobbyists, makers, and professionals alike. In this article, we'll dive into the ESP8266 ESP-01 datasheet, exploring its features, specifications, and applications.
| Mode | GPIO0 | GPIO2 | RST Action | | :--- | :--- | :--- | :--- | | | LOW (GND) | HIGH (3.3V) | Pulse LOW | | Normal Boot (Run) | HIGH (3.3V) | HIGH (3.3V) | Pulse LOW |
The ESP8266 ESP-01 is a compact 2.4 GHz Wi-Fi module powered by the ESP8266EX SoC, featuring a 32-bit MCU, 1MB flash, and an operating voltage of 3.3V DC. It supports AT commands for serial communication, operates in Station/AP modes, and requires 3.3V power, as 5V will cause damage. For detailed technical specifications, refer to the Ai-Thinker ESP-01 Product Specification . ESP8266 Serial Esp-01 WIFI Wireless - Components101