@PascalS Now I see the problem.
Wire is hard defined and set to internal.
You need to use Wire1 to access the external devices.
I vaguely remember reading about this issue before but as I don't have arduino I had forgotten about it.
Thanks for the reminder.
@leaguen have you tried a different adapter like an arduino uno in ISP mode of the M5Stack adapter?
@MK-Turtles Have you tried M5Burner?
Have you installed USB drivers?
@felmue Oh is that was is calling my user code.
I'm proud of that contribution.
@Richelieu said in Multi-channel current measurement using PaHub and ADC Unit, results are lower than w/o PaHub:
Hi there,
I am currently using m5stack and ADC Unit to measure target AC cables.
However, when I attempted to use PaHub and 2 ADC Units to create a multi-channel system, the outputs are 20-30% lower than the results of using simply one ADC unit.Previously, there are a couple of solutions in this forum, like:
https://community.m5stack.com/topic/3040/adc-unit-major-problem?lang=ja
https://community.m5stack.com/topic/1107/solved-fire-pahub-adc-ads1100
I really appreciate it!However, is there any solution without removing the resistors in ADC unit? Instead, is that possible to remove any resistors in PaHub to correct the outputs?
Any does anyone know the reason/principle of removing resistors?
Thank you very much and I appreciate any reply.
Sounds like a power issue, may need to add a power booster
@felmue I wonder if this is a placeholder for the chain amble M5Bits they are working on
@kimurer there are docs on the site, I have videos on YouTube and guides on hackster.io
a book is delayed due to personal life.
@teastain I wasn't aware of the non connection as I dont have the unit, thanks for pointing this out so this revision is based on my designs and feedback.
I need to get some for the Stick projects I have here.
@l-roca There are two direct way to provide additional power to grove devices and that is to use this: https://shop.m5stack.com/products/connector-grove-to-usb-c
or this:
https://shop.m5stack.com/products/5v-buck-converter-unitme3116am6g
Via this:
https://shop.m5stack.com/products/grove-t-connector-5pcs-a-pack
You disconnect the 5v wire going to the controllers and connect 5v and the supplies GND to the marked pins.
You MUST make sure there is NO direct 5V connection between the power supply and controller.
You need to learn about electronics before connecting anything none M5Stack to M5Stack components.
