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Protocentral / Protocentral_MAX30205

Arduino library and hardware for the ProtoCentral MAX30205 body temperature sensor breakout board
https://www.protocentral.com/open-source-health/1088-protocentral-max30205-body-temperature-sensor-breakout-board.html
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Output all zeros #3

Open ghost opened 7 years ago

ghost commented 7 years ago

Hello,

Firstly, thank you for taking the time to document your procedure. It has helped me tremendously in getting started with my project.

I have connected my MAX30205 sensor (as shown in picture attached) and uploaded your script to the arduino, however, the output in the serial terminal window is showing nothing but a stream of 0.00'C values. In the code, I made sure to change the i2c address to match the one of my device, however, I can't seem to think of what I could have done wrong. Do you have any insight into what might cause this issue?

Thank you very much! img-3286

VenkateshBhat commented 7 years ago

Thank you for kind words, could you please share the schematic of the board you are using?

ghost commented 7 years ago

Surely. I've attached the schematic and data sheet for the MAX30205 temp sensor and provided a link to the Arduino Uno R3 board.

Thank you for the quick response!

max30205-human-body-temperature-datasheet.pdf MIKROE-2554_Web.pdf https://store.arduino.cc/arduino-uno-rev3

VenkateshBhat commented 7 years ago

@KaciMadden Thank you, The example sketch has to run directly without any changes. Do test once with same slave address provided in the example sketch.

ghost commented 7 years ago

Okay. I re-downloaded your files and ran them untouched. I'm still getting the same stream of 0.00'c values, however,.

VenkateshBhat commented 7 years ago

The recommended supply for the MAX30205 is 2.7V to 3.3V ,what I can see from the schematic is(https://download.mikroe.com/documents/add-on-boards/click/fever/fever-click-schematic-v100.pdf) it does not include the level translator which could have damaged the chip . You need to have a translator in between SCL and SDA.

mrodas19 commented 6 years ago

you just gotta connect well GROUND

nithin-uppalapati commented 4 years ago

What do you mean by ‘translator’ between SDA and SCL...?

Thanks.

overclock98 commented 3 years ago

@KaciMadden @nithin-uppalapati Did you solve the issue?

bobonov commented 4 weeks ago

What do you mean by ‘translator’ between SDA and SCL...?

Thanks.

I guess he mean a pull up resistor.

According to i2c specification SDA and SCL line are opendrain , devices can take the level to 0V, but you need a pull-up resistor to obtain the high level. You simply need need a resitor between 4.7 kΩ and 10 kΩ that connect the alimentation with the line, one for SDL and one for SCL