Parameter Information

Frequently Asked Questions

Note: Product documentation is provided after purchase.

What is the relationship between DOIT and Espressif?

Espressif supplies the chips used in the ESP-series modules. DOIT develops and manufactures the ESP-series modules. Espressif Information Technology is a shareholder of DOIT.

What is the difference between the ESP8285 and ESP8266?

The ESP8285 integrates 1 MB of flash memory with the ESP8266 core. Its package and low-level protocols are fully compatible with the ESP8266. The ESP8285 offers higher integration and improved high-temperature performance.

Which module should ESP8266 customers choose?

For surface-mount applications, ESP-F/F1 or ESP-M1/M2 modules are recommended. For through-hole applications, the ESP-01S is recommended.

What is the difference between ESP-F, ESP-12E, and ESP-12F?

ESP-F uses a four-layer PCB, while ESP-12E and ESP-12F use two-layer PCBs. For certification and signal-stability requirements, ESP-F is recommended and supports FCC, CE, and SRRC certification.

What are the general performance specifications of ESP-series modules?

ESP-series modules operate at 80-160 MHz. The maximum UART transfer rate is 115200 × 40, approximately 4.5 Mbps. ESP8266 modules support up to 16 MB of external flash. The ESP series provides 160 KB of RAM, with less than 50 KB typically available to user applications. The internal ADC is 12-bit, while the API returns a 10-bit value.

Which ESP-series module offers the longest transmission distance?

Range depends on antenna design. In open-field testing, ESP-F/M/S modules reach approximately 150 m, ESP-12F/12E approximately 100 m, and ESP-01/01S/07 approximately 70 m.

Can ESP-07 modules share an antenna?

They can, but this is not recommended because antenna efficiency will be significantly reduced.

What is the maximum packet length for TCP and UDP transmission?

The maximum TCP packet length is 1460 bytes and the maximum UDP packet length is 1472 bytes.

Why can packet loss occur during transparent transmission?

Packet loss may occur when serial flow control is not enabled.

Features

• Ultra-compact serial-to-Wi-Fi transparent-transmission module.
• Long-range, ultra-low-power operation.
• High-temperature operation up to 125°C.
• Fully compatible with ESP8266 software for direct source-code migration.

SoC and Memory

• Tensilica L106 ultra-low-power 32-bit processor at 80 or 160 MHz with RTOS support.
• Integrated TCP/IP stack and one high-precision 10-bit ADC.
• Interfaces: HSPI, UART, I2C, I2S, infrared remote control, PWM, and GPIO.
• Deep-sleep current: 10 µA; shutdown current: less than 5 µA.
• Wake, connect, and transmit data within 2 ms.
• Standby power below 1.0 mW in DTIM3 mode.
• Integrated 1 MB SPI flash.

Wi-Fi Capabilities

• IEEE 802.11 b/g/n/e/i at 2.4 GHz.
• Station, SoftAP, and SoftAP + Station modes.
• Wi-Fi Direct P2P with discovery, GO/GC modes, and P2P power management.
• CCMP, TKIP, WAPI, WEP, and CRC hardware acceleration.
• WPA/WPA2-PSK and WPS; 802.11i pre-authentication and TSN support.
• 802.11h/RFC1042 frame encapsulation and seamless roaming.
• AT-command remote update, cloud OTA, and SmartConfig for Android and iOS.

Interfaces and Mechanical Data

• 2 × UART, 1 × ADC, 1 × EN, 1 wake-up pin, 1 × HSPI, 1 × I2C, 1 × I2S, and up to 10 GPIOs.
• Operating temperature: -40°C to 125°C.
• Module dimensions: 24 × 16 × 3 mm.

Applications

Home appliances, home automation, smart plugs and lighting, mesh networks, baby monitors, IP cameras, sensor networks, wearable electronics, security ID tags, wireless location awareness, wireless beacons, and industrial wireless control.

Product Images and Diagrams