ESP 01S Development Board

• To program, you have to toggle the GPIO 0 “PRGM” pin to the ground.
• Hook it up to an FTDI  using this breakout board making sure it’s configured for 3.3V.
• Program it through the Arduino IDE. After you click the “Program” button in Arduino.
• 4 GPIOS available ( RX / TX / GPIO 0 / GPIO 2 )

SPECIFICATIONS

• 8Mbit external QSPI flash memory (1MByte)
• 32-bit Tensilica Xtensa LX106 CPU running 80MHz
• 3.3V supply (current can spike 300mA+, depending on model)
• PCB-trace antenna
• 2 x 4 dual-in-line pinout
• 2.5 cm x 1.0 cm x 1.0 cm