Pulse Oximeter and Heart Rate Sensor - MAX30101 & MAX32664 - Error 254

Sensors Biometrics
1

Hello,

I followed the instructions of the hookup guide and started the example sketches on a arduino mega 2560.

But what I get is:

Sensor started!
Configuring Sensor…
Error configuring sensor.
Error: 254
Loading up the buffer with data…

After that its just:

Heartrate: 0
Confidence: 0
Oxygen: 0
Status: 1
Extended Status: 0
Blood Oxygen R value: 0.00

…

repeadiately no matter if there is a finger placed on the Sensor or not. I couldn’t find the error-code in any table or datasheet so I am pretty much clueless here.

2

There was a post about this today in this thread:

viewtopic.php?f=143&t=51905

3

Hi,

I resume this thread because I just bought 2 MAX30101&MAX32664 boards and I am experiencing with both of them the same “Error 254” issue. My Serial output is like this:

Sensor started!
Configuring Sensor....
Error configuring sensor.
Error: 254
Loading up the buffer with data....

Of course no reading available

I checked with multimeter the connections and voltages, they are OK.

I tried the boards with both an ItsyBitsy M0 Express board (SAMD21 based) and an Arduino Uno, same result with same Serial output.

Checking this forum I saw also the (proposed) solution in the thread linked by @brow , but also changing ENABLE_CMD_DELAY from 45 to 90millisec didn’t work for me (as suggested in viewtopic.php?p=221621#p221621)

So, any idea why my sensors are not working / what can I do in order to read something from them?

Thanks to who will be able to help!