Library doesn't work on Sparkfun ESP32 Thing Plus

[theotherjenkutler]

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Hardware:

Board: Sparkfun ESP32 Thing Plus Core Installation version: 1.0.5-rc2 IDE name: Arduino IDE 1.8.13 Flash Frequency: Both 40Mhz and 80Mhz PSRAM enabled: no Upload Speed: 115200 Computer OS: Windows 10 Description:

ESP32 never initializes an instance of this I2C device. The light on the device doesn't turn on and it doesn't appear to communicate. When tested with the exact same sketch with a Teensy LC or Sparkfun Pro Micro, it functions perfectly. Sketch: (leave the backquotes for code formatting)

` /* MAX30105 Breakout: Output all the raw Red/IR/Green readings By: Nathan Seidle @ SparkFun Electronics Date: October 2nd, 2016 https://github.com/sparkfun/MAX30105_Breakout

Outputs all Red/IR/Green values.

Hardware Connections (Breakoutboard to Arduino): -5V = 5V (3.3V is allowed) -GND = GND -SDA = A4 (or SDA) -SCL = A5 (or SCL) -INT = Not connected

The MAX30105 Breakout can handle 5V or 3.3V I2C logic. We recommend powering the board with 5V but it will also run at 3.3V.

This code is released under the MIT License. */

#include <Wire.h> #include "MAX30105.h"

MAX30105 particleSensor;

#define debug Serial //Uncomment this line if you're using an Uno or ESP //#define debug SerialUSB //Uncomment this line if you're using a SAMD21

void setup() { debug.begin(115200); debug.println("MAX30105 Basic Readings Example");

// Initialize sensor if (particleSensor.begin() == false) { debug.println("MAX30105 was not found. Please check wiring/power. "); //while (1); }

particleSensor.setup(); //Configure sensor. Use 6.4mA for LED drive }

void loop() { debug.print(" R["); debug.print(particleSensor.getRed()); debug.print("] IR["); debug.print(particleSensor.getIR()); debug.print("] G["); debug.print(particleSensor.getGreen()); debug.print("]");

debug.println(); } ` Debug Messages:

rst:0x1 (POWERON_RESET),boot:0x13 (SPI_FAST_FLASH_BOOT) flash read err, 1000 ets_main.c 371 ets Jun 8 2016 00:22:57

rst:0x10 (RTCWDT_RTC_RESET),boot:0x13 (SPI_FAST_FLASH_BOOT) configsip: 0, SPIWP:0xee clk_drv:0x00,q_drv:0x00,d_drv:0x00,cs0_drv:0x00,hd_drv:0x00,wp_drv:0x00 mode:DIO, clock div:1 load:0x3fff0018,len:4 load:0x3fff001c,len:1100 load:0x40078000,len:10900 load:0x40080400,len:6388 entry 0x400806b4 MAX30105 Basic Readings Example MAX30105 was not found. Please check wiring/power.

[EspenP]

Was this issue ever resolved? I am having a similar problem on my esp32. What's more, is I was able to detect the device with a simple i2c scan, but running the example scripts still results in the MAX30105 was not found. Please check wiring/power. error.

[theotherjenkutler]

No not a peep. I never managed to get mine working. Starting to explore other libraries and other ESP32 / MAX30101 and/or 30102 modules.

[theotherjenkutler]

I just checked it with an Arduino Micro and this is definitely specific to ESP-32 boards. Not just the Sparkfun board but I just tested it with the ESP32 DEVKITV1. Both have ESP32-WROOM-32 processors. I'm wondering if the conflict might be with the ESP32 Board library. Might try posting there instead since there is no response from the Sparkfun folks.

[theotherjenkutler]

Actually, Adafruit beat you guys to it: https://github.com/espressif/arduino-esp32/issues/4729 This is why the Sparkfun Max library doesn't work with ESP32 boards.

[ROdoka]

nice, but what do I do now? I want to use the sensor ...

I2C scanner sketch does detect it at 0x57, but the begin fails.

I don't see how to fix it and there are not any working replacement libs that I can see or find So if I understand it correct, the problem lies within the ESP32 core files/source? I use an AZ-Delivery Wroom32.

edit: it concerns just reading data? OLEDs are working without problems.

[theotherjenkutler]

Yes. The issue is with the compatibility between the ESP32 library and the Sparkfun MAX3010x library. I believe that it can be addressed on either side. It doesn't look like Sparkfun plans to maintain this library so it's probably up to Esspressif developers or maybe Adafruit will release something. It's a shame. I bought all Sparkfun products specifically to use with this library to ensure compatibility. @nseidle Is there anything you can do for us?

[theotherjenkutler]

@ROdoka I just checked the ESP-32 repository and it looks like they updated some of the i2c core communication code in the last release (hopefully). I'm not sure if it will address this particular problem but it's worth a shot. Have you updated to the latest version of the ESP-32 board? I don't have time to test it tonight....

[ROdoka]

@theotherjenkutler I just upgraded to 1.0.6, I see no I2C related changes in the changelog though and after compiling: same result :/ "MAX30105 was not found"

[ROdoka]

I just switched to Arduino Uno and the sensor works more or less The example with SPO2 und HR shows wrong heart rate though, it varies between 125 and 250 (while it is about 73 in reality), SPO2 looks real, though

[theotherjenkutler]

@ROdoka Yes, I've had the same experience. This problem is specific to ESP32 and ESP8266.