wiring MCP9600 with qwiic-to-dupont wire

Sensors Environmental
1

I’m working on a temp management system for a DIY curing oven, but I’ve hit a bit of a roadblock with the MCP9600 amp. my arduino doesn’t have a qwiic connection built in, so I grabbed a couple qwiic-to-dupont connectors, but after I looked at the library I realized I couldn’t find any support for plugging it directly into my arduino’s pins.

the amp includes solderable connections for GND, VCC, SDA, and SDL, which makes me think that there has to be compatibility for the qwiic to dupont wire.

I’ve been searching online for some more info but the MCP9600 arduino library seems to only like the qwiic to qwiic connectors.

so I don’t really know where to go from here and any help would be sick,

thx

2

Qwiic is just a plug and socket, what’s going on under the hood is plain old I2C so it doesn’t matter if you use Qwiic connectors, a Qwiic to dupont cable or just solder directly to the 3.3v/GND/SCL/SDA pads on the board. All connect to the same place and all use the same code and libraries. (Qwiic just makes it easy to plug something in without soldering.)

3

That’s what I figured, but in all of the examples for the MCP9600 library don’t mention anything about setting the I/O ports, so I’m not really sure how to get the program to recognize the mcp9600. I believe that the examples show how to program it when the amp is plugged directly into a qwiic connect port on the arduino board, which is not something I have.

4

like my confusion isnt about the MCP side of the wire, but how it hooks up to the arduino.

5

What kind of arduino do you have? The quiic port is just a specific type of connector to make this connection easier. On a 3.3v Arduino (not mega), connect gnd to gnd, 3v3 to 3v3, SDA to SDA (or to A4) and SCL to SCL (or A5). On a 5v Arduino (not mega), connect gnd to gnd, 3v3 on the sensor to 5v on the Arduino, SDA to SDA (or to A4) and SCL to SCL (or A5). The MCP9600 will work fine at 5V, but then be careful about plugging anything else into the qwiic ports on the sensor board since many other qwiic devices are 3.3v only…

The library and examples should work; they don’t care whether you use 4 pieces of wire or a qwiic cable

/mike