DFRobot_FRN20

• 中文版

Overview

The FRN20 series micro-flow gas mass flow sensor is specifically designed for various micro-flow process control applications. This product is an upgrade based on the FR20 series, offering significantly enhanced zero stability and full-scale signal stability. It is a suitable for industrial process monitoring.

Product Link (https://www.dfrobot.com/)

SKU: SEN0630

Table of Contents

• Summary
• Installation
• Methods
• Compatibility
• Hardware Connection
• Troubleshooting
• History
• Credits

Summary

This Arduino/C++ library provides drivers for the FRN20 flow sensor. It supports I2C communication to read raw and calibrated flow values, and to load sensor parameters (range, offset, conversion coefficients) from the device.

Installation

1. Download or copy the library into your Arduino libraries directory.
2. Include the library in your sketch:

#include <DFRobot_FRN20.h>

Methods (Arduino C++ API)

/**
 * @fn DFRobot_FRN20
 * @brief Constructor, pass in I2C bus object
 * @param pWire I2C bus object (default: &Wire)
 */
DFRobot_FRN20(TwoWire *pWire = &Wire);

/**
 * @fn begin
 * @brief Initialize I2C and check device presence
 * @return byte Result of `Wire.endTransmission()` (0 = success)
 */
byte begin(void);

/**
 * @fn readMassFlowData
 * @brief Read and convert mass flow using loaded parameters
 * @return uint8_t 1 = success, 0 = failure
 */
uint8_t readMassFlowData(void);

Compatibility

Platform	Work Well	Work Wrong	Untested	Remarks
Arduino UNO	√
Arduino MEGA2560	√
Arduino Leonardo	√
FireBeeetle-M0	√
Firebeetle 2 ESP32-E	√
ESP8266	√
Micro:bit	√

History

• 2026/01/26 - Version 1.0.0 released.

Credits

Written by PLELES (feng.yang@dfrobot.com),2026.(Welcome to our website)