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+--- Forum: KC868-A8v3 (https://www.kincony.com/forum/forumdisplay.php?fid=78)
+--- Thread: a8v3 - RXTX and 4 pulse counters (/showthread.php?tid=8658)
a8v3 - RXTX and 4 pulse counters - rockyhopper - 10-18-2025
Hello,
I plan to buy a8v3 and use it with ESPhome.
But, I would need:
- RXTX (https://esphome.io/components/uart/#uart) ideally on external connector
- 4 Pulse Counters (PCNT, https://esphome.io/components/sensor/pulse_counter/) on external connector
Could you confirm that:
- for RXTX, I can re-assign pins used for Analog Input (AI-1 and AI-2) and map RXTX on it.
Would I lost any other feature (than ADS) from a8v3 in that case (I think that ESP32-S3 is limited to 2 end-user RXTX)?
If that's not possible, can I directly re-use the RS485 connector (for my RXTX pins) as I don't plan to use RS485.
- for my 4 pulse counters, can I re-use the 4 "one-wire with pull-up" (S1 to S4)?
(I plan to add 1-wire over i2c -- DS2484 to support 1-wire sensors, then I don't need those S1-S4 pins).
Thanks in advance for your support.
RE: a8v3 - RXTX and 4 pulse counters - admin - 10-18-2025
1. analog input ports can't use for RXTX module. it's only use for analog input.
2. it's not easy to re use the RS485 esp32 pins for other function. if you want more free GPIOs to use. i suggest you chose F8 board, not A8v3.
3. yes, 1-wire can use for i2c bus.