ESP32 WROOM-32 DEVKIT V1 - Board with WiFi and Bluetooth

You can easily control any device over the Internet through your phone, computer, etc.
The module can handle 5 users at the same time, it can work in two modes: STA (client) and AP (access point).
In AP mode, the module is connected via WIFI directly to your phone or computer (in open field can be up to 300 meters).
In STA mode, the relay module is connected to the access point (router) that supplies the network.
Wi-Fi in the room where the relays are located. In this case, the range mainly depends on the power of the access point antennas (routers).
You should not turn off after the configuration is completed, as some of the parameters of the WIFI module cannot be saved when power is cut off.

WIFI transceiver based on the ESP8266 controller.
It has a microcontroller and 2 GPIO pins to be able to operate autonomously without the need for an external microcontroller. Characteristic: - Voltage of power: 3.3V
- Supported protocols: 802.11 b / g / n
- Network support: 2.4 GHz
- Band: 2400 (MHz)
- Wi-Fi Direct (P2p), Soft Access Point
- Integrated TCP / IP stack
- PLL, regulators and integrated power management units
- Output power: 0.15 (W); + 19.5dBm in 802.11b mode
- Consumption in low power mode:

NodeMcu module based on ESP8266 controller and programming in Lua language
NodeMcu is equipped with 10 GPIO, PWM, I2C, 1-wire and ADC
ESP8266-12E is an improved version of ESP8266-12
It works as a standard WiFi 802.11 b / g / n 2.4 GHz
USB Communication - CP2102 Chip
Characteristic:
ESP 12E ESP8266 ESP12E NodeMcu Lua Wireless Development Board CP2102 WiFi features:

- Supply voltage: 3.3V (LOGICAL LEVELS: 3.3V)
- Supported protocols: 802.11 b / g / n
- Network support: 2.4 GHz
- Band: 2400 (MHz) - Wi-Fi Direct (P2p), Soft Access Point
- Integrated TCP / IP stack
- PLL, regulators and integrated power management units
- Output power: 0 , 15 (W); + 19.5dBm in 802.11b mode

NodeMcu module based on ESP8266 controller and programming in Lua language.
NodeMcu is equipped with 10 GPIO, PWM, I2C, 1-wire and ADC.
ESP8266-12E is an improved version of ESP8266-12.
It works as a standard WiFi 802.11 b / g / n 2.4 GHz.
USB communication - the CH340 chip. Characteristics of ESP 12E:
- Supply voltage: 3.3V (LOGICAL LEVELS: 3.3V)
- Supported protocols: 802.11 b / g / n
- Network support: 2.4 GHz
- Band: 2400 (MHz)
- Wi-Fi Direct (P2p), Soft Access Point
- TCP Stack / Integrated IP
- PLLs, Regulators and Integrated Power Management Units
- Output Power: 0.15 (W); + 19.5dBm in 802.11b mode

Shield Li-Po Battery for WeMos D1 Mini ESP826 features:
Connect the lithium battery to this shield to supply power for the entire D1 mini system.
When the battery is depleted, it is not necessary disconnect the battery, just use the usb port to charge directly. - Charging voltage: max: 10V, recommend: 5V
- Charging current: max: 1A
- Voltage lithium battery: 3.3-4.2V
- Boost power supply: 5V (max: 1 A)
- LED color: red for charging, green for fully charged
- Ports:
* Micro USB - Charging port (normal 5V)
* Connect to the lithium battery (normal 3.3-4.2V)
* J1 - setting the maximum charging current, 0.5 A or 1A

The SparkFun ESP32 thing is an upgrade to boards based on the popular ESP8266. What the 32 version has to offer on top? Well one of the largest upgrades is support for Bluetooth communications and nearly 30 I/O pins. Makes it pretty perfect for any IoT solution, right?

Mini ESP8266 ESP12E CH340 WiFi Development
NodeMcu module based on ESP8266 controller and programming in Lua language
NodeMcu it is equipped with 10 GPIO, PWM, I2C, 1-wire and ADC
It works as a standard WiFi 802.11 b / g / n 2.4 GHz
Wemos D1 Mini ESP8266 ESP12E CH340 WiFi Wireless Development features:

- Compatible with Arduino, programming with the Arduino IDE
- Power supply voltage: 5V
- LOGICAL LEVELS: 3.3V
- 11 input / output pins
- 1 ADC (input: 0-3.3V)
- Supported protocols: 802.11 b / g / n
- Network support: 2.4 GHz - Band: 2400 (MHz)
- Wi-Fi Direct (P2p), Soft Access Point
- Integrated TCP / IP stack
- PLL, regulators and power management units Integrated

TUYA IoT interface module - you will be able to control your projects IoT Internet of Things interface of your Arduino. Tuya interface that allows you to control outputs of the Arduino module via WiFi network using apps for Android and iOS mobile devices. The device communicates with Arduino via UART interface, powered by 5V.

Shelly 1 is a universal smarthome relay enabled to work with all the key smart home systems, including Google Home and Amazon Alexa, as well as an original Shelly solution Shelly Cloud

The SparkFun WiFi ESP8266 Shield is a shield for Arduino R3 R3 board enabling internet connection. ESP8266 as you all know is a solid fundament for any IoT project an in this version it can be simply and easily put on your board. It is a great middle ground between the sole module and the development board such NodeMcu or WeMos. So if you need a relatively cheap and super reliable way to internet for your Arduino project - this is the shield for you! ESP8266 shield WiFi comes with an AT-command firmware, hence can be controlled by any UART. It works great with any Arduino R· layout. The shield doesn´t have the headers on.