MessengerPi (Set Of 2)

MessengerPi is your ultimate communication companion powered by the Raspberry Pi Pico RP2040. It  includes both a walkie-talkie and a LoRa module for comprehensive wireless communication. The LoRa module is perfect for long-distance message transmission, capable of reaching up to 5 kilometers using license-free frequencies (433MHz, 868MHz, 915MHz). The walkie-talkie function allows for audio transmission up to 1 kilometer, with adjustable frequencies (400-480MHz) and power settings to suit various needs. The device also features a QWERTY keypad for easy message typing and supports multiple audio outputs, including 3W speakers and headphones, for versatile audio options. For visual interaction the board is provided with a large 2.0" TFT display. It includes an onboard micro SD card slot for easy data logging and offers UART breakout for custom setups. Equipped with a Type C interface for both power and programming, MessengerPi is designed for versatile connectivity.

Ideal for hikers, campers, and makers looking for a practical and fun project. With this device, you can have more fun and excitement playing games like hide and seek, scavenger hunt, spy game, and others. MessengerPi is perfect for adventures, emergencies, and environments where mobile coverage is unreliable. 

Stay connected, no matter where your adventures take you.

Features:

• Powered by Raspberry Pi Pico RP2040, a dual-core Arm Cortex-M0+ CPU with a maximum speed of 133 MHz and a 2.0" TFT display for visual engagement.
• Type C interface for power and programming.
• Equipped with a walkie-talkie and a LoRa module for wireless communication
• LoRa module is used for low data rate communication, such as sending simple messages.
• Qwerty keypad to easily type messages for sending.
• LoRa can attain distances up to 5 kilometers for message transmission in open air.
• Choose from license-free ISM bands of 433MHz, 868MHz, and 915MHz for LoRa.
• Walkie-Talkies can transmit audio up to 1km in open air.
• Walkie-Talkie frequencies can be tuned between 400-480MHz with wattage settings (0.5W and 1W) to meet regulations for license-free usage in different regions.
• Easily communicate with individuals at a distance via walkie-talkie utilizing the onboard microphone.
• Push to Talk button for easy switch between Audio transmission and receive mode
• Multiple audio output choices are provided, including a 2mm JST connector and a 2.54" 2 pin header for connecting 3W speakers.
• There is also a 3.5mm Aux OUT to attach headphones for private listening.
• Easy data logging with onboard micro SD card compatibility and status LEDs for board power, LoRa, and walkie-talkie transmission.
• UART breakout of LoRa and Walkie-talkie module is offered for custom setup as needed.

Specification:

• Microcontroller: RP2040
• Supply Voltage: 5V Type C 
• Operating pin voltage: 3.3V
• Battery Connector: 3.7V Lithium Ion
• Display: 

  • Display Size: 2.0”

  • Display Type: IPS TFT 

  • Display Resolution:  240×320 pixels

  • Display colors: 65K

  • Luminance(cd/m2): 350

  • Display interface: SPI

  • Display Driver: ST7789V
    

• Audio Outputs:

• • 3W Speaker Output at 2.54” standard Header and 2mm JST 

  • Standard 3.5mm TRS Headphone Jack

• Walkie-Talkie Module :

• Frequency Range => 400 ~ 480MHz

• Bandwidth => 12.5KHz / 25 KHz

• Communication Distance => around 1km tested in Open area

• Current Consumption => Rx around 60 mA and for Tx around 750 mA

• LoRa Module :

• communication distance => up to 5km in open area

• Maximum transmission power => 60mW, software multi-level adjustable

• Support the license-free ISM => 433MHz, 868MHz, 915MHz band

• Support air date rate => 0.3kbps ~ 62.5kbps 

• Operating Temperature Range: -20°C ~ +70°C 

Pinouts:

Dimensions:

Applications:

• Portable personal walkie talkie  
• Communication Gadget for trekkers and mountaineers
• Messaging and an emergency SOS system
• Outdoor Sport products  
• Building community security system
• Instantaneous and group communication

Compatibility:

MessengerPi Board is also compatible with Walkie-Talkie Breakout Board

Kit Content:

• 2X MessengerPi Board
• 2X Walkie-Talkie UHF Straight Rod Antenna
• 2X 2W 6ohm Mono Enclosed Speaker
• 2X JST-SH-1MM-4 pin Female Housing Connector Wire
• 2X LoRa 3.0 dBi Antenna -(433/868/915MHz) Depending upon the Antenna Frequency you choose

Resources:

Software GitHub: Getting Started Guide

Hardware GitHub: Hardware Design files like Schematic, Step and 3D