Wi-Fi Slot

  • AMP-B120
€24,95
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Connect all of your devices with WiFi. This WiFi adapter will help you quickly and accurately assemble a smart sensor or actuator for your own Internet of Things (IOT) system, help you create a remote audio server, or control a mobile robot. The board can be programmed in C++ and JavaScript - write your code how you like!

Board Features

Onboard we've put together everything for a quick and easy set-up: an ESP12 module with an ESP8266EX chip, a USB connector for programming and debugging, a buck DC-DC converter with an output current of up to 1 A, 10 I/O pins with PWM support, and two user buttons.

The raw ESP8266EX chip supports only one analog input with voltages up to 1 volt. We added an eight-channel analog multiplexer to the board paired with the ADC channel selector chip. For matching voltage levels there is a resistive divider. Therefore, this WiFi adapter can simultaneously work with eight analog sensors and signal voltage up to 3.3 V.

We have simplified flashing ESP as well. Forget the button-press voodoo on each flashing. An embedded circuit to auto-switch to the programming mode will take care of it.

Assembly

The board allows you to connect up to four Troyka Modules without soldering, wires, or electrical tape. If this is not enough, plug in the Slot Expander. One WiFi Slot can control over a hundred adapters.

Programming

This WiFi Adapter will appeal to both handsome, charming, bearded electronics engineers or even web programmers who use spaces instead of tabs. The board is programmed in C++ via the Arduino IDE and JavaScript via the Espruino Web IDE.

Performance

WiFi Slot is based on an ESP-12 module with an ESP8266EX chip. The chip is made according to SoC (System-on-a-Chip) technology. The heart of the device is a 32-bit Xtensa Tensilica L106 processor with a frequency of 80 MHz and a ultra low power consumption, an RF transceiver with a WiFi physical layer IEEE 802.11 b/g, and SRAM memory blocks. The processor is powerful enough for complex user applications as well as digital signal processing.

I/O Ports

On the board, we have provided ten I/O ports with PWM support. Eight of them are designed to work with analog sensors.

Power

Power is connected via a micro-USB connector, designed for 5 volts. As such, the voltage source can be a computer, a phone charger, or a power bank. Need more? Use this DC/DC converter from the LED strip driver.

On board the platform you will find two power lines:

  • 5V - power line 5 volts via micro USB connector
  • V - power supply 3.3 volt from the DC-DC converter
  • GND - common ground

Specifications

  • Module: ESP-12 (ESP8266)
  • Clock Frequency: 80 MHz
  • Flash Memory: 2 MB
  • Wireless Interface: Wi-Fi 802.11 b/g 2.4 GHz
  • Operating Modes: client (STA), access point (AP), client + Access point (STA + AP)
  • I/O ports total: 10
  • Ports with ADC: 8
  • ADC Resolution: 10 bits
  • Ports with PWM (Software): 10
  • PWM Resolution: Defaults to 10 bits
  • SPI Hardware Interfaces: 1
  • I²C/TWI Software Interface: 1
  • UART/Serial Hardware Interfaces: 2
  • Rated Operating Voltage: 3.3 V
  • Maximum Current from the 3.3V bus: 1 A (including the power supply of the microcontroller)
  • Maximum Current from pins: 12 mA
  • Dimensions: 50.8 × 50.8 mm (2" x 2")