Hello,

I have a syringe infusion pump that has USB I/O capability using a virtual COM port. Using RealTerm or HyperTerminal I can poll the device to check its status and current volume of fluid infused. Infused volume over time is a helpful data signal that I would like to record, but my DAQ requires analog signals.

What I am hoping to build is microcontroller-based device that can poll the infusion pump for its status at a set rate (~2 Hz) via USB, parse out the infused volume information from the status string, and use PWM or an external DAC to output a proportional voltage signal to which I can calibrate back to millilitres on my DAQ.

I am just not sure if it possible to have the device act as a host to communicate with the infusion pump without a PC.

Any help is much appreciated - thank you!

Infusion pump manual:
http://www.harvardapparatus.com/media/manuals/Product Manuals/11 Elite OEM Manual_5420-007REV1.0.pdf

 

Looks like there is are things called USB host shields.

 

Picmirochip has 24f chips that can be a host

 

Take a look at the teensy 3.2 (or higher). I believe it can be a host and has a DAC. You can use the arduino IDE.

 

For those interested, I managed to get this working using an Arduino/USB Host Shield:
https://forum.arduino.cc/index.php?topic=503359