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4 Channel 5V Relay Module
4 channel relay module (relay-module-4ch)
  • Module schematic (PNG)
  • Wiki for more informations (LIEN)
  • 5V activated relay
  • Can be activated directly from a microcontroler, or an Arduino
    • Activation current 15 to 20 mA
  • 4x relay AC250V 10A / DC30V 10A
  • Each relay has an LED to show the state of the relay
9.95$
ESP-01 (ESP8266) (oh-esp01)
  • WiFi Module can easily give any microcontroller access to your WiFi network.
  • Run out of the box that just simply hook this up to your Arduino device and get about as much WiFi-ability as a WiFi Shield offers.
  • Supports APSD for VoIP applications and Bluetooth co-existance interfaces.
  • Contains a self-calibrated RF allowing it to work under all operating conditions, and requires no external RF parts.
  • This module has a powerful enough on-board processing and storage capability.
6.95$
nrf24l01
nRF24L01 2.4GHz radio module (oh-nrf24L01)
  • NRF24L01+ 2.4GHz Antenna Wireless Transceiver Module
  • Maximum operating speeds up to 2Mbps, GFSK modulation efficiency, Anti-interference ability, particularly suitable for industrial control applications
  • 125 Channels, Multi-point communication and frequency hopping to meet the communication needs
  • Built-in hardware CRC error detection, Multipoint communication address control
  • Low-power 1.9 ~ 3.6V, only 1uA on Power down mode
  • Arduino and Raspberry Pi compatible
  • Datasheet (PDF)
  • Schematic (PNG)
5.95$
ESP-01S (ESP8266) (oh-esp01S)

The ESP-01S ESP8266 WiFi Module is a self contained SOC with integrated TCP/IP protocol stack that can give any microcontroller access to your WiFi network. The ESP8266 is capable of either hosting an application or offloading all Wi-Fi networking functions from another application processor. Each ESP-01S ESP8266 module comes pre-programmed with an AT command set firmware, meaning, you can simply hook this up to your Arduino device and get about as much WiFi-ability as a WiFi Shield offers (and that’s just out of the box)! The ESP-01S ESP8266 module is an extremely cost effective board with a huge, and ever growing, community.

This module has a powerful enough on-board processing and storage capability that allows it to be integrated with the sensors and other application specific devices through its GPIOs with minimal development up-front and minimal loading during runtime. Its high degree of on-chip integration allows for minimal external circuitry, including the front-end module, is designed to occupy minimal PCB area. The ESP8266 supports APSD for VoIP applications and Bluetooth co-existance interfaces, it contains a self-calibrated RF allowing it to work under all operating conditions, and requires no external RF parts.

Features:

  • 802.11 b/g/n
  • Wi-Fi Direct (P2P), soft-AP
  • Integrated TCP/IP protocol stack
  • Integrated TR switch, balun, LNA, power amplifier and matching network
  • Integrated PLLs, regulators, DCXO and power management units
  • +19.5dBm output power in 802.11b mode
  • Power down leakage current of <10uA
  • 1MB Flash Memory
  • Integrated low power 32-bit CPU could be used as application processor
  • SDIO 1.1 / 2.0, SPI, UART
  • STBC, 1×1 MIMO, 2×1 MIMO
  • A-MPDU & A-MSDU aggregation & 0.4ms guard interval
  • Wake up and transmit packets in < 2ms
  • Standby power consumption of < 1.0mW (DTIM3)

Documents:

6.95$
Relay module board (10A) (oh-module-relay-1-10A)
  • 1 Channel
    • NO and NF
  • Arduino compatible
  • Working voltage 5V 
  • LED indicator
4.95$
ESP32 DEVKIT V1 Board (Wi-Fi and Bluetooth) (oh-esp32-devkit-board)
  • This is an Arduino IDE comptabile development board
  •  Processors:
    • CPU: Xtensa dual-core (or single-core) 32-bit LX6 microprocessor, operating at 160 or 240 MHz and performing at up to 600 DMIPS
    • Ultra low power (ULP) co-processor
  • Memory: 520 KiB SRAM
  • Wireless connectivity:
    • Wi-Fi: 802.11 b/g/n
    • Bluetooth: v4.2 BR/EDR and BLE
  • Peripheral interfaces:
  • Security:
  • Power management:
    • Internal low-dropout regulator
    • Individual power domain for RTC
    • 5μA deep sleep current
    • Wake up from GPIO interrupt, timer, ADC measurements, capacitive touch sensor interrupt
12.95$
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