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Multiflexmeter

Hardware Overview

Introduction to the Multiflexmeter 3.7.0 hardware platform and its components.

Board Overview

Section titled “Board Overview”

The Multiflexmeter 3.7.0 is built around the ATmega1284P microcontroller and RFM95 LoRa radio module, providing a complete IoT sensor platform in a compact form factor.

Key Components

Section titled “Key Components”

1. ATmega1284P Microcontroller

Section titled “1. ATmega1284P Microcontroller”
  • 8-bit AVR processor @ 8MHz
  • 128KB Flash for firmware
  • 16KB SRAM for runtime
  • 4KB EEPROM for configuration

2. RFM95W LoRa Module

Section titled “2. RFM95W LoRa Module”
  • 868MHz transceiver
  • Up to +20dBm output power
  • -148dBm sensitivity
  • Long-range capability (up to 10km)

3. Sensor Interface

Section titled “3. Sensor Interface”
  • I²C/SMBus for sensor communication
  • Standard pinout for easy integration
  • 3.3V/5V compatible

4. Programming & Debug

Section titled “4. Programming & Debug”
  • J5: 6-pin ICSP/ISP header for firmware upload (Atmel-ICE compatible)
  • J4: FTDI-compatible UART for debugging (115200 baud)
  • J3: SMBus/I²C expansion connector
  • J1/J2: Sensor module slots

Block Diagram

Section titled “Block Diagram”
┌─────────────────────────────────────────┐
│           Multiflexmeter 3.7.0             │
│                                         │
│  ┌──────────┐          ┌────────────┐  │
│  │          │   SPI    │            │  │
│  │ ATmega   ├──────────┤   RFM95    │  │
│  │ 1284P    │          │  LoRa      │  │
│  │          │          │  Module    │  │
│  └────┬─────┘          └──────┬─────┘  │
│       │                       │         │
│       │ I²C              Antenna        │
│       │                       │         │
│  ┌────┴─────┐           ┌────┴─────┐   │
│  │  Sensor  │           │   ISP    │   │
│  │Interface │           │ & UART   │   │
│  └──────────┘           └──────────┘   │
└─────────────────────────────────────────┘

Next Steps

Section titled “Next Steps”