Sale is for TWO units pair bi-direccional transparent link high power modules

• Complete TRANSPARENT SERIAL "over air" link KIT. Those modules are a transparent serial UART wireless 2.4GHz link. Means you can transmit transparent UART serial TTL data from any UART device, one point to other or others inside air broadcast
• Modules have individual address so you can transmitt to one or many on same ID. Reliable data delivery, wireless frames w/ CRC plus ACK & Retransmit if failure, default up to 100 retries.
• Secure data link module2module or module to many modules at defined network or broadcasting.
• 2.4GHz band coexistence. Very reliable link. 2,4GHz for small antenna or high directional YAGI antenna for very long range.
• possible repeater ultra long range mode usin x4modules. ( x2 center modules interconnected uart tx to rx and vice versa, using frequency f1 and frequency f2 ) & more configurations possible.
• possible to power modules directly from a 18650 lithium battery cell or LiPo ( calculate hours autonomy example 3000mAh cell will power module consuming avg 30mA for aprox 100hours active, or play with duty active/standy mode to have long time autonomy
• possible switch on/off trigger from code to supply power to module direct from arduino or other module, but u need to use 6 six pin sink outputs parallel to supply 20mA x 6 = 120mA continuous or 240mA peak, use capacitor. do u know what I mean?

- Connect TX, RX & power and module is ready to play

• Update multiple arduinos at same time or send RPC remote commands or just send any serial data. Create UART serial reliable/secure wireless network.
• Simply connect a TTL serial interface to a transmitter and receiver module and the modules will transparently transmit your data over a 2.4GHz signal at a range of up to pratical 400 meters w/original antennas or much more with high gain antenna Up to Km's connection.

The module can also be placed into a configuration (AT) mode and using simple ASCII 'AT' commands sent via its serial port its default parameters can be changed. This includes changing its frequency to one of 80 channels or its two byte ID which allows a theoretical 65536 modules to communicate with each other. - reception w automatic retry system is enabled (defaults to 100 retries) which will repeatedly resend a data packet a fixed number of times.

Specifications:

• Working voltage: 3.3V-5.5V (compatible w 18650 cells 3,3V to 4,2V voltage range)
• Frequency range: 2402~2482MHz
• Transmit power: high power 20dBm with antenna connector (possible to add a bidireccional power amplifier.. 30dBm or more)
• Receiver sensitivity: -87dBm
• Operating temperature: -40~+85 ° c
• Transparent transmission mode baud rate 2400, 4800, 9600（Default), 14400, 19200, 38400, 57600, 115200, 128000, 256000
• AT mode configured baud rate fix to: 9600;
• Transmission current: 120mA peak (make sure usin a low ripple power supply)
• Receive current: 30mA
• Genuine original modules, high quality pcb multilayer, plus RF circuit optimized and tha best components

Connections:

1. VDD: 3.3V to 5V power supply

2. GND: Ground

3. TXD: serial port output, Arduino or USB to serial port RXD

4. RXD: serial port input, Arduino or USB to serial port TXD

5. CMD: Enter PIN AT mode, active low level;

GREAT APPLICATION example: COMMANDS OVER THE AIR to control any IO's, timmers, PWM analog from any arduino compactible board. Just create commands as you need and function handler, commands will be received by wireless and reach the target function or task

Send defined command by serial wireless and remote arduino/arduinos will do it. Create more functions for more commands or tasks. Check out: serial commands example

Download Arduno library here: AT command style library

Now you can control any arduino IO's wirelessly real time. Any microcontroller with TX, RX serial will work for this wireless modules.

See example serial commands over the air network diagram here: basic diagram multiple modules communication

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