ESP-01 Wi-Fi Module: ESP-01 Pinout, Programming and ESP-01 VS ESP8266 [FAQ]

The ESP-01 WIFI Wireless Transceiver Module is a self-contained SOC with an integrated TCP/IP protocol stack that can give any microcontroller access to your Wi-Fi network. 

ESP-01 Symbol

ESP-01 Footprint

ESP-01 3D Model

Pimoroni Ltd ESP001 technical specifications, attributes, parameters and parts with similar specifications to Pimoroni Ltd ESP001.

• 802.11 b/g/n

• Integrated low power 32-bit MCU

• Integrated 10-bit ADC

• Integrated TCP/IP protocol stack 

• Integrated TR switch, balun, LNA, power amplifier, and matching network

• Integrated PLL, regulators, and power management units

• Supports antenna diversity

• Wi-Fi 2.4 GHz, support WPA/WPA2

• Support STA/AP/STA+AP operation modes

• Support Smart Link Function for both Android and iOS devices

• Support Smart Link Function for both Android and iOS devices

As a result, I devised a better way to utilize the ESP-01 as a  WiFi  shield, in which the ESP-01  is in charge of establishing WiFi and HTTP(S) connections, as seen in "Using the ESP-01  as an Arduino." As a sensor node, a Host  (in my case and STM32 Blue Pill) will communicate with the ESP-01  via a serial interface. This is similar to using the ESP-01  with AT command firmware, except the ESP-01  's firmware is replaced with the Arduino web client, and we can design our communication requests and responses between the serials.

ESP01 connection with Host

ESP-01 VS ESP-01S

The ESP-01 is on the left, and the ESP-01S is on the right. The ESP-01  includes two LEDs near the PCB antenna, one for the Tx line (GPIO1) and the other for the power indicator. The ESP-01  S, on the other hand, has only one Blue LED and is wired to GPIO2. Two more pull-up resistors were added to the ESP-01  S, which can be seen between the ESP8266EX chip and the header pins. Between the CH PD and 3v3 (VCC) pins is one of the pull-up resistors.

Pimoroni designs manufacture and sell friendly products for Makers, Educators, and Creatives. Founded in 2012 by Jon Williamson and Paul Beech, Pimoroni makes tech treasure for tinkerers. The company started just after Paul won a competition to design the Raspberry Pi logo. Supported by the Raspberry Pi community, as well as the wider Maker community, Pimoroni wants to bring electronics to a larger audience by making electronics accessible and attractive. Pimoroni has seen 80% growth each year since they started and currently employ over 30 people from their headquarters in Sheffield, in the northern UK. This growth has been sustained by selling internationally through more than 50 worldwide distributors. Pimoroni is the largest Adafruit reseller in the UK. When Kickstarter launched their UK site, Pimoroni's Picade (a kit to convert your Raspberry Pi into a desktop arcade machine) was their first project.