Hello,
I have connected the cjmcu-3221 to the arduino
when I run the i2c-scanner - I see the device at address 0x41
I ahve download and install the library from :
https://github.com/switchdoclabs/SDL_Arduino_INA3221
at the code runs
but I think something in my connection is not good , becasue I can see the voltage arond 12V but hte mA is around 0;
I'm testing a 12V led but the mA is should be around 120mA
what should go to CH1 and what to GND ?
Thanks ,
Post wiring diagram.
After more search I have found the correct connections:
POW ---> Vin+ of the power supply
GND ---> Gnd of the power supply
CH1 ---> V+ of the checked device
GND ---> Gnd of the checked device
CH2 ---> V+ of the checked device
GND ---> Gnd of the checked device
it's seems that I all devcies need to use the cjmcu-3221 as the power source of them
which for my project it's good - I have only 1 power line for my devices
but now I have a "noise" problem?
when I only connected a led to ch1 - I get ~25mA , which is correct
when I connected a device to ch2 that use ~500mA
the ch1 current jump to ~38mA
when I disconnected the led on ch1 , I see that also when nothing is connected the channel print ~14mA
when I disconnected the device on ch2 , the current on ch1 is OK ~ 25mA
any idea\reason why ?