Hi @Will-Dickson,

I'm experiencing a lot of noise on my measurements with the Potentiostat based on Teensy3.2. Any suggestions on how to improve it?
It was first connected to my computer through a USB 3.0 HUB. I changed it to a dedicated port, it was better, but not much.

I thought changing to a better power source would improve it, so I've been thinking about one of these paths https://www.pjrc.com/teensy/external_power.html. The USB Cable modification would be the easiest, but not sure if I'll get much better results.

Thanks,
rcbb

@Will-Dickson

Good to hear it. I was actually taking a look at what AD/PalmSens have released, EmStat, and was looking for something more affordable.

About the BLE integration, I'm running on an unexpected behavior. I set up the connection, but the first time I do a command, it responds as false. The second time I send the the same json command, it returns true.

I'm testing with "{"command":"getVariant"}". It's just on the first run.

rcbb

Hi Will,

Thanks for your reply. Actually, I'm following your updates on the bitbucket repo for the featherwing for a while. Haven't seen any firmware for the feather-stat, just for the pHmeter.
I was taking a look at those options from Adafruit. It definitely looks promising. Will the firmware be similar to the previous one? Or are you migrating to python?

Ok, so I successfully finished the BLE connection using HM10. Just have to follow the steps provided by franxi2953.
I was having issues because of my files. I was updating a different version that was being compiled.

I found the http://forum.iorodeo.com/topic/91/arduino-communication/6 thread. I think that's pretty good start.

Hi,

Here in the lab we are thinking about changing the way the potentiostat communicates with PC from cable to Bluetooth (BLE).
The quickest way looks like just using the P13 Expasion Headers serial port and adding a bluetooth
I have gone over some of the firmware and it seem like it's mainly the ps_message_sender and ps_message_receiver. Is there anything else I should look for in the firmware?
Has anyone tried it yet?

Thanks,
rcbb

Hi @Will-Dickson ,

Have you got a chance to look at this? Any ideas on why I'm getting such strange results?

Rodrigo

Ok, so I've managed to test a different Rodeostat and a different Dummy cell.
Here are the result:
Second Test result

Any idea what could be causing such difference?

Hi,

I've been getting unexpected values for my tests with Cyclic voltammetry with SPEs. I moved back to a dummy cell to start from a known point but I'm getting strange results. My current appears to have opposite signal and I'm not sure why.

I can't be 100% sure, but as far as I remember, I was getting fine results before having to update it. Re: Python error

Also, it seems to me I'm getting a lot of noise. Here's the image from my test with a dummy cell.

Blue line = input potential
Orange line = output current

Test result

Is this correct? Any suggestions on how to deal with noise besides filtering?

For the SPE, I'm using the connector sold on iorodeo store, but it's loose. I'm might be having contact issues. Any suggestions on how to solve it?

Hi, @austin ,

I followed all your steps and it worked perfectly. Thanks a lot!

rcbb