It’s something that I’ve purchased and forgotten about.
None of the numbers or images reveal anything in Google for me.
I’d like to find the schematic for it.
Thank you.
Weird. An image search bought up plenty of hits for me. It’s an ESP32-DevKitC Carrier Module like this one, right?
Yes, that’s it. Google Lens found similar but not the same for me.
I need to track down the schematic now.
Thank you.
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I have this board that I purchased some time ago and never used. I can’t find a schematic now that I have a use for the board.
It has 8 relay outputs, 4 ADC inputs, and 4 binary inputs, along with RS485, I2C and SPI bus support.
I have determined the GPIOs for the outputs, ADCs, relays, I2C, RS485 and SPI and all work.
I’m left with GPIO 32, 33, 25, 26.
In ESPHome, assigning the above GPIOs to binary_sensors sees no changes, whether I use GND, 3V3, 5V or 24V (the board supposedly supports 24V) as input.
GPIO 32 and 33 are input only on ESP32, however, if I set all 4 GPIOs as switches I can get all 4 LEDs, X0-X3, to light on and off, albeit dimly, so I know that the GPIOs are correct.
I’ve tried emailing suppliers of this board with no response.
Any suggestions?
Seems to be a pretty basic 2 layer board. You should be able to physically trace the connections from the GPIO positions on the header to wherever they go.
Thank you, Tom.
I know where they go and which are the GPIOs. I just don’t get any response on the inputs. They remain firmly at GND potential when not in use.
It’ll be a shame to bin it, as you’ll appreciate, it’s of little use with no inputs.
Where do they go?
Clutching at straws - but have you had a play with pullup: and inverted:? Maybe those resistors are for the leds?
They are both I/O.
Thank you. I was thinking of 34-39.
So while 24V and GND connected to terminal you take jumper wire and toggle Xx pin with 24V/GND you don’t get any response on your binary sensor?
Thank you for your help, everyone.
At last the manufacturer came through with the docs!
It’s a nice, comprehensive board.
For curiosity, what was the problem then?
Not too sure yet. I’ll be checking it out tonight now that I have the manual.
