Description
ESP-01S ESP8266 Wi-Fi Module
Compact Wi-Fi module based on the ESP8266 system-on-chip. It can connect a microcontroller to a Wi-Fi network or run application code using its integrated 32-bit processor.
Specifications stated in the listing
- Wi-Fi: IEEE 802.11 b/g/n, 2.4GHz
- Wi-Fi Direct (P2P) and soft-AP
- Integrated TCP/IP protocol stack
- Integrated RF switch, balun, LNA, power amplifier and matching network
- Flash memory: 1MB (8Mbit), as listed
- Interfaces: SDIO 1.1/2.0, SPI and UART
- Output power: +19.5dBm in 802.11b mode, as listed
- Dimensions: 24.75 × 14.5mm
The ESP-01S board exposes fewer GPIO pins than some other ESP8266 development boards. Verify the exact board pinout, firmware and available flash. ESP8266 modules use 3.3V logic; use a stable 3.3V supply with adequate peak current and do not connect 5V signals directly to GPIO. The exact module regulator and protection depend on the board version.
