Is MAX31865 RTD PT100 Temp Amplifier Compatible with Arduino Ecosystem?

Verdict Badge

VERDICT: [ COMPATIBLE — MANUAL YAML CONFIGURATION REQUIRED ]

Protocol: SPI Bus / 3.3V

Bridge Needed: NO

Hardware Safety & Electrical Verification

Electrical parameters & logic voltage safety limits before powering ICs

🟢 3.3V Native Direct Hookup 🧪 Verified in Lab

Signal Logic GPIO Logic: 3.3V CMOS

Input Power Battery Input: 3.0V DC Rail

Current Profile Peak Tx Current: ~180mA to ~250mA @ 3.3V

Enclosure Rating None (Exposed Board)

## Compatibility Overview

Industrial-grade platinum RTD resistance thermometer amplifier delivering high precision temperature readings.

Interactive Pinout & Wiring Diagram

Hover over any pin to view voltage limits and pull-up specifications

VCC

3.3V Power

GND

Ground Common

SDA / TX

Data Line (GPIO 21)

SCL / RX

Clock Line (GPIO 22)

CS / INT

Chip Select (GPIO 19)

## Technical Specification Matrix

Feature / Attribute	Specification / Status
Hardware Protocol	SPI Bus / 3.3V
Bridge Required	NO
Border Router Needed	None
Exposed Entities	PT100 Platinum Temp (C) Resistance (Ohm) Fault Status
Pairing Complexity	Advanced
Factory Reset Instruction	Press BOOT button while resetting.

## Step-by-Step Pairing Guide

Factory Reset Device

Press BOOT button while resetting.

Initialize Pairing Mode on Arduino Ecosystem

Open Arduino Ecosystem administration console, navigate to Integrations / Add Device, and start pairing scanner.

Confirm Entity Binding & State Verification

Verify that primary entities (PT100 Platinum Temp (C), Resistance (Ohm), Fault Status) report live state changes inside Arduino Ecosystem.

Production Code Generator & Preset Toolkit

Pre-configured pinouts & drivers for MAX31865 RTD PT100 Temp Amplifier

SDA Pin: SCL Pin:

Test in Wokwi Simulator ↗ | Real-time pin binding active

👥 Community Verified Database Continuous hardware testing updates

Report a Pinout Error or Submit Tested Code Snippets

Found a pin mapping quirk or built a custom ESPHome YAML driver for MAX31865 RTD PT100 Temp Amplifier? Help us keep this matrix 100% accurate.

## Frequently Asked Questions

Does this device operate in Offline Mode?

100% local SPI RTD conversion.

What is the expected Battery Life & Power specification?

3.3V VCC SPI (CS=GPIO5 SCK=GPIO18 MISO=GPIO19 MOSI=GPIO23).

How does Signal Mesh & Range Extension function?

Wi-Fi 2.4GHz.

Related Compatibility Matrix Guides

I2C / 5V-3.3V Level Shift