ESP-01 (esp8266): high-resolution pinout and specs

The ESP-01 module is a compact and cost-effective Wi-Fi module based on the ESP8266 chipset. It is a highly integrated chip designed for the needs of a new connected world.

Link to the high resolution image

Here my selection of devices WeMos D1 mini - NodeMCU V2 V2.1 V3 - esp01 - esp01 programmer

The module allows you to connect your microcontroller projects to a Wi-Fi network, making it ideal for IoT (Internet of Things) applications. With its small form factor and simple pinout, the ESP-01 is a convenient choice for adding wireless connectivity with minimal hassle.

Specs

• Processor: L106 32-bit RISC microprocessor core based on the Tensilica Diamond Standard 106Micro running at 80 or 160 MHz^[5]
• Memory:^[6]
  • 32 KiB instruction RAM
  • 32 KiB instruction cache RAM
  • 80 KiB user-data RAM
  • 16 KiB ETS system-data RAM
• External QSPI flash: 512 KiB
• IEEE 802.11 b/g/n Wi-Fi
  • Integrated TR switch, balun, LNA, power amplifier and matching network
  • WEP or WPA/WPA2 authentication, or open networks
• 17 GPIO pins^[7]
• Serial Peripheral Interface Bus (SPI)
• I²C (software implementation)^[8]
• I²S interfaces with DMA (sharing pins with GPIO)
• UART on dedicated pins, plus a transmit-only UART can be enabled on GPIO2
• 10-bit ADC (successive approximation ADC)
• Status LED (GPIO1)

Pinout description

• VCC: Power supply (3.3V)
• GND: Ground
• TX: Transmit Data (Connected to the LED)
• RX: Receive Data
• CH_PD: Chip Power Down (Active High)
• RST: Reset (Active Low)
• GPIO0: General-purpose I/O 0
• GPIO2: General-purpose I/O 2

How To

ESP-01 modules programming board

esp8266 Tutorial

1. WeMos D1 mini (esp8266), specs and IDE configuration
2. WeMos D1 mini (esp8266), integrated SPIFFS Filesystem
3. WeMos D1 mini (esp8266), debug on secondary UART
4. WeMos D1 mini (esp8266), the three type of sleep mode to manage energy savings
5. WeMos D1 mini (esp8266), integrated LittleFS Filesystem
6. esp12 esp07 (esp8266): flash, pinout, specs and IDE configuration
7. Firmware and OTA update management
   1. Firmware management
      1. esp8266: flash firmware binary (.bin) compiled and signed
      2. esp8266: flash firmware and filesystem binary (.bin) compiled with GUI tools
   2. OTA update with Arduino IDE
      1. esp8266 OTA update with Arduino IDE: filesystem, signed and password
   3. OTA update with Web Browser
      1. esp8266 OTA update with Web Browser: firmware, filesystem and authentication
      2. esp8266 OTA update with Web Browser: sign the firmware and HTTPS (SSL/TLS)
      3. esp8266 OTA update with Web Browser: custom web interface
   4. Self OTA uptate from HTTP server
      1. esp8266 self OTA update firmware from server
      2. esp8266 self OTA update firmware from server with version check
      3. esp8266 self OTA update in HTTPS (SSL/TLS) with trusted self signed certificate
   5. Non standard Firmware update
      1. esp8266 firmware and filesystem update from SD card
      2. esp8266 firmware and filesystem update with FTP client
8. esp32 and esp8266: FAT filesystem on external SPI flash memory
9. i2c esp8266: how to, network 5v, 3.3v, speed, and custom pins
10. […]

Datasheet

ESP-01 Product specification

ESP-01 Datasheet

ESP8266EX Datasheet

Thanks

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