Wireless Communication

NodeMCU is a low-cost open source IoT platform. It initially included firmware which runs on the ESP8266 Wi-Fi SoC from Espressif Systems, and hardware which was based on the ESP-12 module. Later, support for the ESP32 32-bit MCU was added. The term "NodeMCU" strictly speaking refers to the firmware rather than the associated development kits Features: High performance-price ratio  Small volume, easily embezzled to other products  Strong function with support LWIP protocol, Freertos  Supports three modes: AP, STA and AP + STA  Compatible with the Lua program, easy to develop Antenna and balun RF are already integrated, power amplifier, low noise amplifiers, filters, and power management module. The complete solution occupies the least amount of printed circuit area.  This board is used with 2.4GHz dual-mode Wi-Fi and Bluetooth chips by low power TSMC 40nm technology, the best power and RF properties, which are safe, reliable and scalable to a variety of applications.    NOTE: We have both ESP8266 and ESP32S available. Specifications Resources Datasheet Sample Code Tutorial

This module can be configured in a transmitter or receiver, the transmitter could be paired with the receiver, the receiver and the receiver or the transmitter and the transmitter can not communicate between when buying, the default value for the receiver. It uses the conventional Bluetooth chip CSR, Bluetooth V2.0 protocol standards. 3.3 V operating voltage module Potter default rate of 9600, the user can be set. Core module size: 28mm x 15mm x 2.35mm. Operating current: compatible with 30 MA, which coincides with 8 MA communication. Current of rest: without rest. Used for GPS navigation system, water meter and electricity meter reading system. With computer and Bluetooth adapter, PDA, seamless connection equipment Business series: series of Bluetooth modules With LED indicator light, uses 3.3 mA and V. regulation chip With VCC. GND. TXD. RXD foot for Bluetooth With "Re-SEARCH" button (on / off / activation foot for it, external MCU outside / "high level" input can control the module to search again) Compatible with Bluetooth master module "Slave module" or Slave master module (integer). Input voltage: 3.3-6 V Size: 1.55 cm * 3.98 cm Input power supply 3.3 6 V, prohibition more than 7 V It does not "automatically prevent the operation of the power supply", so it correctly connects the power supply We recommend installing "Bluetooth master module" The "status" is the output foot for the status of the LED, When Bluetooth "not connected", it emits "Pulse", When Bluetooth "connected", emits "high level", we can determine the States from "MCU" If only the card, There is no "Bluetooth function" Specification Resources Datasheet Library Sample Code Tutorial  

It uses Doppler radar technology, with auto-sensing capabilities to control other product,High sensitivity, sensor distance, reliability, wide angle sensor,Wide supply voltage range and other characteristics. Widely used in lighting situations,anti-theft alarm situations.   Features: Microwave sensors using planar antenna and receiving echo. The switch is active sensors. The sensors emit a high-frequency electromagnetic waves and receives their echo. The sensors detect changes within echo. The sensors detect tiny movement in detect range. Send signal to MCU and execution instruction. Signals are likely to be detected through the door, glass and thin walls. It will get best probe result if person or object when moving toward the sensor. This product is a strong anti-jamming capability, almost without wind, heat and other environmental factors foreign interference   Parameter: working voltage: 3.3-20VDC standby quiescent current: <3mA transmit power: <2mW the working environment temperature: -20°~+80° Trigger: Repeat Trigger (default) the output signal: TTL level; high->3.3V/Low->0V detection angle: 360°(spherical) no dead ends detection range: 6-9 meters (when ordering optional). The default setting 8 meters the working delay: 1 second to hundreds of seconds, the default setting 30S Application: Security Intelligent Lighting Body sensors toys Industrial automation and control Auto-sensing electrical equipment Battery-powered automatic control Specifications Resources Datasheet Sample Code Tutorial

This transmitter board using refined double panel, excellent quality, using high-quality high-frequency special electronic component, PCB pads are tinned, ensure the welding quality, assembled into finished products can be directly put on the market, non-general student training kit comparable quality. Product Features: Converts stereo audio signal input into the FM wave emitted for FM radio reception, realize the function of wireless transmission of stereo audio signals, a pilot system FM stereo transmitter.  High-frequency circuits using PLL FM stereo transmitter integrated circuit chip BH1417F (or their own replacement for BH1416F), the operating frequency is quite stable, because the body does not produce induction frequency drift, operating frequency is set by DIP switch control, if BH1416F, emission frequency can debug seven frequencies for low-end 76.8,77.0,77.2,77.4,77.6,77.8,78.0 optional or optional high 88.0,88.2,88.4,88.6,88.8,89.0,89.2 seven frequencies, using one meter antenna its transmission distance of about 100 meters in open areas; if BH1417F, transmit frequency can debug options for low-end or high-frequency 87.7,87.9,88.1,88.3,88.5,88.7,88.9 seven 106.7,106.9,107.1,107.3,107.5 , 107.7,107.9 seven frequencies available, simply change the frequency of replacement DIP switch coding to board. Suitable for teaching or school counseling student radio radio enthusiasts assembly, installation and commissioning of complete specification (including schematics, assembly drawings), does not contain audio transmission line. Model: BH1417FDimensions: 80x45mmWorking voltage: 9-12V (Tip: if you need 4-6V(5V), please you contact me, 5V versions, you can use the USB port power supply)Antenna length: 1mTransmission Distance: 50-100m (open space) 14 operation Frequencys can select by DIP switch: L L L L 87.7MHZ H L L L 87.9 MHZ L H L L 88.1 MHZ H H L L 88.3 MHZ L L H L 88.5 MHZ H L H L 88.7 MHZ L H H L 88.9 MHZ L L L H 106.7 MHZ H L L H 106.9 MHZ L H L H 107.1 MHZ H H L H 107.3 MHZ L L H H 107.5 MHZ H L H H 107.7 MHZ L H H H 107.9 MHZ The kit can also be applied to BH1415F IC, MCU control part only required by the buyers of their own design. The hands-on experience using BH1415F reference: first make use of BH1417F circuit, after successful commissioning BH1417F and under the DIP switch welding, put BH1415F, connect the programming part of the circuit, this would at least ensure that the hardware part of the work is normal, attention , BH1415F must be soldered. Resources Datasheet Tutorial

Parameter: Frequency 2400 ~ 2500 MHz S.W.R. <= 2.0 Antenna Gain 3.0 ± 0.7dBi Polarization Linear Impedance 50 Ohm Length: 35mm Width: 6mm   Material & Mechanical Characteristics: Material of Radiator PCB Cable Type O.D. 1.13 mm // 100 mm Connector Type Mini Connector Pull Test >= 1.0 Kg Environmental: Operation Temperature - 40 °C ~ + 65 °C Storage Temperature - 40 °C ~ + 80 °C   Application: 1.IEEE 802.11 b/g/n WLAN System 2.Wireless Communication System 3.Wi-Fi / WiMAX / MIMO System 4.Laptop/Bluetooth/Zigbee Antenna Specifications  

Use CH340G repalce CP2102. Open-source, interactive, programmable, low cost, Simple, smart, Wi-Fi enabled For Arduino as IO hardware Advanced API for IO hardware, which can dramatically reduce redundant work to configure and manipulate hardware. Code as for arduino, but interactively in Lua script. Nodejs network style API Event-driven API for network applications That you facilitate the writing code of the developers that runs on a 5mm * 5mm MCU in Nodejs style. It greatly accelerates the process of developing IOT applications. Lower cost WI-FI Less than 3 integrated ESP8266 Wi-Fi MCU and esay for the prototype development kit. Specifications Drive Type Dual high-power H-bridge Power Input(V) 4.5 to 9 Communication Interface Voltage(V) 3.3 Flash size(MB) 4 Operating Temperature (°C) -40 to 125 Transfer Rate(Kbps) 110 to 460800 AD0 1 channel ADC Length (mm) 49 Width (mm) 24.5 Height (mm) 13 Shipment Weight 0.165 kg Shipment Dimensions 6 × 4 × 2 cm Resources Datasheet Sample Code Tutorial  

Chip: SIM800L Voltage: 3.7-4.2 V Support networks: Global four-band network Module size: 2.5 cm x 2.3 cm TTL serial port for serial port, you can connect directly to the microcontroller. No need for MAX232 Automatic start of the power module, connection network Signal lights on board all the way. Blinks slowly when there is a signal, flashes quickly when there is no signal. This is Small SIM800L GPRS GSM Module Micro SIM Card Core Board Quad-band TTL Serial Port with the antenna, in this module two antennas have been included. SIM800L GSM/GPRS module is a miniature GSM modem, which can be integrated into a great number of IoT projects. You can use this module to accomplish almost anything a normal cell phone can; SMS text messages, make or receive phone calls, connecting to the internet through GPRS, TCP/IP, and more! To top it off, the module supports quad-band GSM/GPRS network, meaning it works pretty much anywhere in the world. Specifications Resources Datasheet Sample Code  Tutorial

Description Add Internet to your next project with an adorable, bite-sized WiFi microcontroller, at a price you like! The ESP8266 processor from Espressif is an 80 MHz microcontroller with a full WiFi front-end (both as client and access point) and TCP/IP stack with DNS support as well.  We do sell these on a breakout, but maybe you wanna just put this in your own project PCB. The module supports standard IEEE 802.11b/g/n protocol, a complete TCP/IP protocol stack. Users can use the modules for an existing device to add networking, or building a separate network controller. ESP8266EX is among the most integrated WiFi chip in the industry; it integrates the antenna switches, RF balun, power amplifier, low noise receive amplifier, filters, power management modules, it requires minimal external circuitry, and the entire solution, including front-end module, is designed to occupy minimal PCB area. ESP8266EX also integrates an enhanced version of Tensilica’s L106 Diamond series 32-bit processor, with on-chip SRAM, besides the Wi-Fi functionalities. ESP8266EX is often integrated with external sensors and other application specific devices through its GPIOs; codes for such applications are provided in examples in the SDK. Features 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 security mode Support STA/AP/STA+AP operation modes Support Smart Link Function for both Android and iOS devices SDIO 2.0, (H) SPI, UART, I2C, I2S, IRDA, PWM, GPIO STBC, 1x1 MIMO, 2x1 MIMO A-MPDU & A-MSDU aggregation and 0.4s guard interval Deep sleep power <10uA, Power down leakage current < 5uA Wake up and transmit packets in < 2ms Standby power consumption of < 1.0mW (DTIM3) +20dBm output power in 802.11b mode Operating temperature range -40C ~ 85C FCC, CE, and ROSH certified Specifications Resources Datasheet Library Sample Code Tutorial   

Description: Bluetooth voice player, a Bluetooth speaker anytime anywhere Features: Bluetooth wireless connection.Longest communication distance 20 meter. Bluetooth 4.0. Support decoding function. Support amplifier function. Pairing voice prompts. Parameters : Mode: XH-M226 Working Voltage: 5 V Transmission rate: 500Kbps Output Power: 3 W * 2 Audio Socket: 3.5 mm Size: 68 * 48 * 10 mm Indicator description: Green LED is power indicator,Blue LED will keep light after power on or no connection to Bluetooth device succeeded. Connection succeeded but don't play : Blue LED will keep on. Blue LED keep flashing:Playing   Application: Speaker Smart home Voice prompts Hotel Mall Toy Outdoor travel Specifications  

Core51822 is a wireless module based on nRF51822 - the Multiprotocol Bluetooth® 4.0 low energy/2.4 GHz RF SoC designed for ULP (ultra low power) wirelesss applications. Overview Core51822 is a wireless module based on nRF51822-the low-power Bluetooth® 4.0 Multiprotocol / 2.4 GHz RF soC designed for ULP (ultra low power) wireless applications. Core51822 Specifications On board the chip: nRF51822 Communication distance (external open @ 1 M data rate): 30 m Frequency range: 2.4 GHz Operating voltage: 2.0 V ~ 3.6 V Operating temperature: -40 ° ~ 85 ° Dimensions (PCB): 20.3 mm x 15.50 mm Expansion pinheader: all the I / Os except P0.26 and P0.27 Pinheader pitch: 2.00 mm Spacing between pinheaders on the left side and right side: 18.00 mm Antenna: antenna on board NRF51822 Feature 2.4 GHz multiprotocol RF transceiver 128-bit AES HW encryption 256kB flash & 16kB of RAM Programmable Peripheral Interconnection (PPI) Digital interfaces: SPI, I2C, UART 10 bit ADC Programmable output power: -20 to + 4 dBm The development of independent applications and protocol stacks Fully compatible with NRF24L series Pin assignment compatible with NRF51xxx series Global separate power management Operating voltage: 1.8 V ~ 3.6 V Application: Wearable devices Bluetooth smart application Mobile phone accessories RFID labels Smart home appliances Industrial control Data acquisition system Specifications Resources Datasheet

Features: On board two power supply interface VCC5 5 V VCC4 interface 3.5 power supply. 4.5 V optional power supply of envelope that (default) and control to start On board SMA (default) and IPXmini antenna interface SIM900A reserved interface reset? The size of the module is 49 * 50, all the new and original device. The computer can provide the power supply of the USB debugging module of the computer, A large amount of data under the recommended current condition more than 1 A. Dozens of waiting MA data can be configured to provide Rest, rest of 10 ma of low power. Support 2, 3.4G mobile phone card. Serial port circuit: compatible with 3.3 V single-chip microcomputer Microcomputer with single chip TTL serial port support3.3 and 5 V. The circuit SIM card to increase the SMF05C ESD chip Antenna circuit: guarantees a short and straight, to guarantee the strength of the signal. PCB screen printing brand: each interface, practical development twice, The SIM900 / hardware is completely still in the design when the manual design Two power supply interface: VCC5 5 V DC above 1A! The power supply of the 5 V computer can be the first USB in the computer. Largest DC long data circuit recommended 5V1A. VCC4 3.5. 4.5 V Ibid power supply suitable for lithium battery Control Pin all cables. A TTL level, compatible with 3.3 V and 5 V. The interface of two antennas, the straight head SMA predetermined, the connector for the IPXmini antenna. A form of speech interface, the way it exchanges the microphone. The control interface of each pin Description: GND-GNDSIMR SIM900A RXD TTL level It can not be directly connected to the 232 levelSIMT SIM900A TXD TTL level It can not be connected directly to the 232 levelRST-SIM900A reset Active lowVCC_MCU when the SIM900A module and 5V level TTL communication This pin is connected to DC 5 V; When the communication level of SIM900A and 3.3V TTL ... This pin is connected to DC 3.3 V. VCC5 ---- DC 5 V input? VCC4 ------ DC3.5--4.5 input Integrated resources: serial port circuit (with protection) Antenna interface circuit (SMA curve female port) SIM card circuit (Flip SIM slot) 4 * 3.5 fixture hole 4pcsSIM900A serial port terminal output Specifications Resources Datasheet Sample Code Tutorial  

ESP8266 It is a highly integrated chip designed for the needs of a new connected world. It offers a complete and autonomous Wi-Fi network solution, which allows hosting the application or downloading all Wi-Fi network functions from another application processor. ESP8266 has powerful on-board storage and processing capabilities that allow it to integrate with sensors and other application-specific devices through its GPIOs with minimal development ahead and minimal load during runtime. Its high degree of chip integration allows a minimum external circuit, and the entire solution, including the front module, is designed to occupy a minimum PCB area. SDIO 2.0 SPI UART  32-pin QFN package  Integrated RF balun switch 24dBm PA DCXO and PMU  Integrated RISC processor, on-chip memory and external memory interfaces  Integrated baseband / processors  Quality of  I2S management service high-fidelity audio interface of applications  Low-chip on-line linear regulators for all internal supplies  Proprietary spurious-free clock generation architecture  Integrated WEP, TKIP, AES and WPI engines Supports APSD for optical VoIP applications  Patented spurious noise cancellation algorithm for integration in SOC applications  Compatible with  self-calibrated Bluetooth Bluetooth coexistence interface to ensure optimal performance in all operating conditions  Details: 802.11 b / g / n  Direct Wi-Fi (P2P) de-AP  Integrated protocol TCP / IP stack  Integrated TR switch, balun, LNA, power amplifier and matching  network Integrated PLLs, regulators, DCXO and units power management  + 19 Output power 5dBm in 802.11b mode Power leakage current of <10uA  Integrated low-power 32-bit CPU can be used as  SDIO application processor 1.1 / 2.0 SPI UART  Management 1 × 1 MIMO 2 × 1 MIMO  - MPDU and A-MSDU aggregation and 0.4 ms Guard interval Wake up and transmit packets in <2 ms  Standby power consumption of <1.0 mW (DTIM3) Specifications Resources Datasheet Sample Code Tutorial

The ESP32 CAM WiFi Module Bluetooth with OV2640 Camera Module 2MP For Face Recognization has a very competitive small-size camera module that can operate independently as a minimum system with a footprint of only 40 x 27 mm; a deep sleep current of up to 6mA and is widely used in various IoT applications. It is suitable for home smart devices, industrial wireless control, wireless monitoring, and other IoT applications. This module adopts a DIP package and can be directly inserted into the backplane to realize rapid production of products, providing customers with high-reliability connection mode, which is convenient for application in various IoT hardware terminals. ESP integrates WiFi, traditional Bluetooth, and BLE Beacon, with 2 high-performance 32-bit LX6 CPUs, 7-stage pipeline architecture. It has the main frequency adjustment range of 80MHz to 240MHz, on-chip sensor, Hall sensor, temperature sensor, etc.   ESP32-CAM : The smallest 802.11b/g/n Wi-Fi BT SoC module. Low power 32-bit CPU, can also serve the application processor. Up to 160MHz clock speed, summary computing power up to 600 DMIPS. Built-in 520 KB SRAM, external 4MPSRAM. Supports UART/SPI/I2C/PWM/ADC/DAC. Support OV2640 and OV7670 cameras, built-in flash lamp. Support image WiFI upload. Supports TF card. Supports multiple sleep modes. Embedded Lwip and FreeRTOS. Supports STA/AP/STA+AP operation mode. Support Smart Config/AirKiss technology. Support for serial port local and remote firmware upgrades (FOTA). Specifications : Wireless Module: ESP32-S WiFi 802.11 b/g/n + Bluetooth 4.2 LE module with PCB antenna, u.FL connector, 32Mbit SPI flash, 4MBit PSRAM. External Storage: micro SD card slotup to 4GB. Camera FPC connector. Support for OV2640 (sold with a board) or OV7670 cameras. Image Format: JPEG(OV2640 support only ), BMP, grayscale. LED flashlight. Expansion: 16x through-holes with UART, SPI, I2C, PWM. Misc: Reset button. Power Supply: 5V via pin header. Power Consumption. Flash LED off: 180mA @ 5V. Flash LED on to maximum brightness: 310mA @ 5V. Deep-sleep: 6mA @ 5V min. Modem-sleep: 20mA @ 5V min. Light-sleep: 6.7mA @ 5V min. Dimensions (ESP32): 40 x 27 x 12 (LxWxH) mm. Temperature Range: Operating: -20 ~ 85 ; storage: -40 ~ 90 @ <90%RH. Package Includes : 1x ESP32 CAM WiFi Module. 1x OV2640 Camera Module 2MP. 1x Antenna