An archive of community.esquilo.io as of Saturday January 26, 2019.

Will this shield work with the Esquilo?

JefferyS

Looking to get this to use on a Esquilo and wanted someone to take a quick look and give me a best guess if it will work or not. Won't hold it against you if it doesn't :smile:

It says it will only work with a 5v compliant Arduino.

http://www.atlas-scientific.com/product_pages/components/tentacle-shield.html

Thanks,

Jeffery

Scott_Shumate

I didn't see a schematic on their site so it is hard to tell. It looks like most of the EZO modules support 3.3V operation but I don't know about their carrier board.

JefferyS

Thanks a lot Scott. I know it was a very open question, guess I'll try it out and see.

whitebox

Hi there,

creator of the Tentacle Shield(s) here. The 4-channel version of the shield is 5V only because it generates the voltage (5V) for IO (SCL/SDA) on board. So, your micro must be 5V tolerant. Also for the isolated DC/DC circuits to work, they need to be powered by 5V.

The 2-channel version ("Tentacle Mini") however can be used on 3.3V devices. It still needs 5V to power the DC/DC circuits, but you can apply 3.3V on its "IOREF" pin. The IO (SCL/SDA) will be powered by the voltage on IOREF. This will make it work on 3.3V only controllers.

If Esquilo correctly applies 3.3V on IOREF, the Mini will work.

Schematics of the 4-channel version:
https://github.com/whitebox-labs/tentacle/blob/master/hardware/tentacle_schematic.pdf

Schematic of the 2-channel version:
https://github.com/whitebox-labs/tentacle-mini-oshw/blob/master/hardware/T2_mini_schematic.pdf

We don't have an Esquilo to test - there are just too many Arduino-compatible boards out there to test them all.

Let me know if this works for you.

Patrick / Whitebox Labs

JefferyS

Thanks for the information about that. I found a level converter that will work with the I2C lines from Adafruit. 4-channel I2C-safe Bi-directional Logic Level Converter

I'm going to give that a try and see how it does. I'm hoping translating the code to the Esquilo will not be to bad.

It's such an awesome board with the built in web server and all that.

Thanks,

Jeffery

JefferyS

I have it working using the logic level converter.

I've been running commands and getting data from the pH Circuit. Took me awhile to figure out how to talk to it using squirrel.

Working on making my program now.

Thanks,

Jeffery