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: 32-bit RISC CPU (Tensilica L106) running at 80 MHz (overclockable to 160 MHz).
Because of the pinout constraints, the ESP-01 excels at:
has a single blue LED connected to GPIO2, whereas the original ESP-01 often featured two LEDs (power and TX/RX). : Due to the internal pull-ups, the esp-01 datasheet
Pro Tip: Keep a PDF of the ESP8266EX Technical Reference Manual on your desktop. You won't read all of it, but you will search for "Deep Sleep" and "GPIO" a thousand times.
The heart of the ESP-01 is the ESP8266EX chip, a high-integration wireless SoC. According to technical documentation from retailers like Micro Robotics and OTRONIC , the module features: : 32-bit RISC CPU (Tensilica L106) running at
: Standard blue modules typically feature 512KB of flash, while the upgraded black ESP-01S modules often include 1MB.
Read the ESP-01 datasheet you wire it up. Memorize the voltage requirement (3.3V!). Respect the boot sequence. You won't read all of it, but you
includes 12K pull-up resistors on the RST, GPIO0, and CH_PD pins. This means you don't need external resistors to keep the module stable during power-up. : The
: Used to determine boot mode. Pull LOW to enter programming/flash mode; pull HIGH for normal operation. GPIO2 : Must be pulled HIGH at boot. ESP-01 vs. ESP-01S: Key Differences
The ESP-01 uses a 2x4 male header. Understanding the pinout is critical because several pins must be pulled high or low to ensure the module boots correctly. : 3.3V Power supply. GND : Ground.