Hello, I recently acquired a EMG grove sensor. Im using it directly with an Arduino Uno. Im having issues with the readings in the serial monitor.
It just shows values around 300 without making any changes when I move the attached muscles, also shows the same values when the electrodes are not attached. I checked all connections more times and also the code without getting the problem solved.
I’m connecting the yellow cable to the A0 pin, the red one to the 5v and the black to the ground directly into the Arduino board.
Maybe that’s the issue? Do I need to connect the EMG sensor to an external power source instead? I would be really thankful for some help.
Best greetings,
Daniel.
This one: https://www.seeedstudio.com/Grove-EMG-Detector-p-1737.html ?
There is also a wiki for it.
I'm sorry, but I have not heard someone using that sensor.
Do you use this sketch: Grove_EMG_detector_demo_code/Grove_EMG_detector_demo_code.ino at master · Seeed-Studio/Grove_EMG_detector_demo_code · GitHub ?
That sketch clips the maximum to 300. I don't understand why.
Is the VOUT connected to Arduino A0 ? That is okay.
After a few seconds the value should drop. Bending you arm does not need force. You need your muscles to really do some force to detect it.
Maybe your Arduino is connected to the computer and that causes too much electrical noise.
I have the MyoWare Muscle Sensor. I found it very hard for a reliable result. I have added a speaker to it and the frequency changes when it detect muscle activity. I use a battery pack to power it to avoid electrical noise. Sometimes it works, but the probes have to be attached in the right place. When I demonstrated it for my physiotherapist, it failed to work properly.
Hello, thanks a lot for your reply. Yes I have already tried with the example code from the wiki page of grove. But I’m getting the same values. Anyways I find useful your comments about the power source, since that is something that I have been guessing too. In the page of grove they said that this kind of sensor is able to work directly being powered from the Arduino. Anyways, since you had the same problem with the Myoware, I will give the try too. Thank you for your time. I will let you know it that worked out.
Best*
Daniel
I use a battery pack to power the Arduino Uno and the MyoWare Muscle Sensor is powered by the Arduino Uno. So there are no connections to a device or the mains.