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using-mcp9808-with-arduino-r4-uno-ra4m1-32-bit-renesas-cortex-m4-core-753196-en.md

Using MCP9808 with Arduino R4 Minima (RA4M1 Renesas Cortex-M4 Core).

Project Description

This project is implementing a simple example to test I2C interface on R4 Minima. The example uses Wire.h library to communicate through I2C with the sensor(MCP9808) and read temperature data.

Also SoftwareSerial.h is used to print data on the Serial Monitor. For this purpose a USB to UART converter is used (CP210x Silicon Labs).

Hardware Connections

Sensor MCP9808

  1. 3.3 V -> 3.3 V
  1. SDA->SDA
  1. SCL->SCL
  1. GND->GND

CP210x USB to UART Converter (CP2102N Silicon Labs)

In the code as TX and RX pins are defined:

#define RX_PIN 10
#define TX_PIN 11

  1. TX (Arduino) -> RX (CP2102N)
  1. RX (Arduino) -> TX (CP2102N)
  1. Common GND.

Components

https://store.arduino.cc/pages/uno-r4

https://www.mikroe.com/thermo-8-click

https://www.silabs.com/development-tools/interface/cp2102n-mini-development-kit?tab=overview

EXPANDED TECHNICAL DETAILS

High-Resolution Thermal Sensing

This project explores the integration of the ultra-precise MCP9808 temperature sensor with the next-generation Arduino R4 UNO.

  • MCP9808 Precision: Unlike standard thermistors, the MCP9808 is accurate to ±0.25°C with a resolution of 0.0625°C. The Arduino communicates with it over the I2C bus.
  • R4 Performance Hub: The Arduino R4 WiFi, powered by the Renesas RA4M1 (48MHz), easily handles the high-precision floating-point math required for scientific-grade temperature logging without any latency.

Advanced Features

  • Programmable Alerts: The sensor features a dedicated hardware "Alert" pin. The Arduino R4 uses Hardware Interrupts to instantly react if a critical temperature threshold is crossed, providing a fail-safe for sensitive equipment or incubators.

ข้อมูล Frontmatter ดั้งเดิม 

title: "Using MCP9808 with Arduino R4 UNO (RA4M1 32-bit Renesas Cortex-M4 Core)"
description: "Temperature Sensing Application"
author: "ik_renesas"
category: "Sensors & Environment"
tags:
  - "Weather"
  - "Environmental Sensing"
views: 759
likes: 0
price: 299
difficulty: "Easy"
components:
  - "1x cp2102n USB to UART bridge"
  - "1x Arduino R4 Minima"
  - "1x mcp9808"
  - "1x Arduino IDE"
tools: []
apps:
  - "1x Arduino IDE"
downloadableFiles:
  - "https://github.com/ikanariREN/mcp9808-arduino-r4-minima.git"
documentationLinks: []
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seoDescription: "Learn how to use MCP9808 with Arduino R4 UNO (RA4M1) for accurate Temperature Sensing applications."
videoLinks: []
heroImage: "https://cdn.jsdelivr.net/gh/bigboxthailand/arduino-assets@main/images/projects/using-mcp9808-with-arduino-r4-uno-ra4m1-32-bit-renesas-cortex-m4-core-753196_cover.png"
lang: "en"