KC868-A8 Schematic

[DarthWeber]

Dear Support,

could you please post the schemtaic of the 1.6 boards? I am confused with the pins 32,33, 36, 39 and their relation to S1,2,3,4 which seems to be different in v1.5. I am looking for a pin direct connected to the esp32 - without pull-up/down.

I tried to connect an AM312 to one of the pins S1-4 but it does only work with an external pull-down of 4.7k. This sensor ouputs digital 3.3V as HIGH and should be connected direct to a pin without pullup or down.

Thanks,
Tom

[admin]

https://www.kincony.com/download/KC868-A8-schematic.pdf

[DarthWeber]

Thanks, but in that schematic DAT_TEP3 and 4 seems to be not connected on the ESP32 since they are red crossed?

[admin]

see photo.    

[DarthWeber]

Thank you. Sure, this is the same for 1.6 ? I connected my PIR to S3 but i got the signal on GPIO32. I use tasmota with this config:

{"NAME":"KC868-A8","GPIO":[32,0,1120,0,640,608,0,0,0,1,1,1152,0,0,5600,0,0,0,0,5568,0,0,0,0,0,0,0,0,1,1,0,0,1,0,0,1],"FLAG":0,"BASE":1}

[admin]

sorry, my mistake. about KC868-A8 V1.6 PCB version:
S1: GPIO14
S2: GPIO13
S3: GPIO32
S4: GPIO33

[tanoshimi]

Dear Support,

could you please post the schemtaic of the 1.6 boards? I am confused with the pins 32,33, 36, 39 and their relation to S1,2,3,4 which seems to be different in v1.5. I am looking for a pin direct connected to the esp32 - without pull-up/down.

I tried to connect an AM312 to one of the pins S1-4 but it does only work with an external pull-down of 4.7k. This sensor ouputs digital 3.3V as HIGH and should be connected direct to a pin without pullup or down.

Thanks,
Tom

I had a similar problem recently and had to desolder the SMD pullup resistors from the board (and the 100Ω series resistor), then make a solder bridge across the pads so that the temrinals were a direct connection to the GPIO pins of the ESP32. I hope that Kincony reconsider this in future designs, because it's a weird and frustrating limitation to have those permenant pullups installed.

[admin]

Yes, now our new model will have two different free GPIO. some have pull-up resistor, some without resistor.