DFRobot Oxygen Sensor SEN0322

w33v · March 5, 2025, 6:41am

I’m trying to get the SEN0322 working with ESP Home.

It’s currently connected to an ESP8266 and works well through the Arduino IDE, using the:

src/DFRobot_OxygenSensor.h

master

/*!
 * @file DFRobot_OxygenSensor.h
 * @brief Define basic struct of DFRobot_OxygenSensor class
 * @details This is an electrochemical oxygen sensor, I2C address can be changed by a dip switch, and the oxygen concentration can be obtained through I2C.
 * @copyright	Copyright (c) 2010 DFRobot Co.Ltd (http://www.dfrobot.com)
 * @license The MIT License (MIT)
 * @author ZhixinLiu([email protected])
 * @version V1.0.1
 * @date 2023-08-02
 * @url https://github.com/DFRobot/DFRobot_OxygenSensor
 */
#ifndef __DFRobot_OxygenSensor_H__
#define __DFRobot_OxygenSensor_H__

#include <Arduino.h>
#include <Wire.h>

#define ADDRESS_0   0x70
#define ADDRESS_1   0x71
#define ADDRESS_2   0x72

This file has been truncated. show original

When trying to create the .yaml for this component I just get hit with preparation errors.
I’m not looking for any debugging, I have several different versions of code and each have their own issue. What I’m asking is, has anyone every got this working and how did they get it working through ESP Home?

There is a youtube vid showing someone “apparently” getting it working through Arduino IDE, but you don’t see it working, just them typing.
yt- v=u6Mp43mA7BI&t=386s

makbart1980 · July 2, 2025, 5:12pm

Hey, I’m also looking for a solution. I came across this:

Someone knowledgeable needs to create a repository on GitHub —
then it will work with ESPHome. Unfortunately, I don’t have the skills to do it myself.
I tried with the help of AI, but it’s not working out.
Maybe someone will finally help.

makbart1980 · July 10, 2025, 7:02pm

Hi

I created a custom library for sen0322 under esphome.

If you want to try to see how it works in esp home (I assure you that it works), below I provide a library for this sensor.