ICNT86 support for I2C component

[Minikea]

Describe the component you'd like

could you bring the ICNT86 chip into esphome?
used by WAVESHARE 2.9inch Touch e-Paper HAT for touchscreen.

What are your use cases for this component?

it's the I2C part used for a touchscreen. the touchscreen itself may be GT911 compatible, but I can not test that.

Is there a public datasheet, documentation and/or schematics?

you can find this chip used in waveshare :
https://www.waveshare.com/wiki/2.9inch_Touch_e-Paper_HAT_Manual
https://www.waveshare.com/wiki/Pico-CapTouch-ePaper-2.9

it seems the I2C respond to 0x48.

Anything else?

logs:

[15:58:24][I][logger:165]: Log initialized
[15:58:24][C][safe_mode:082]: There have been 6 suspected unsuccessful boot attempts
[15:58:24][D][esp32.preferences:142]: Writing 1 items: 0 cached, 1 written, 0 failed
[15:58:24][I][app:090]: Running through setup()
[15:58:24][C][component:164]: Setup spi took 1ms
[15:58:24][I][i2c.idf:191]: Performing bus recovery
[15:58:24][C][component:164]: Setup i2c took 37ms
[15:58:24][C][component:164]: Setup preferences took 0ms
[15:58:24][C][component:164]: Setup homeassistant.time took 0ms
[15:58:24][C][component:164]: Setup copy.sensor took 0ms
[15:58:24][C][component:164]: Setup touchscreen took 1ms
[15:58:24][D][esp-idf:000]: E (907) i2c.master: I2C hardware NACK detected
[15:58:24][D][esp-idf:000]: E (908) i2c.master: I2C transaction unexpected nack detected
[15:58:24][D][esp-idf:000]: E (908) i2c.master: s_i2c_synchronous_transaction(945): I2C transaction failed
[15:58:24][D][esp-idf:000]: E (908) i2c.master: i2c_master_execute_defined_operations(1366): I2C transaction failed
[15:58:24][D][esp-idf:000]: E (914) i2c.master: I2C hardware NACK detected
[15:58:24][D][esp-idf:000]: E (914) i2c.master: I2C transaction unexpected nack detected
[15:58:24][D][esp-idf:000]: E (924) i2c.master: s_i2c_synchronous_transaction(945): I2C transaction failed
[15:58:24][D][esp-idf:000]: E (934) i2c.master: i2c_master_execute_defined_operations(1366): I2C transaction failed
[15:58:24][E][component:296]: touchscreen set Error flag: Calibration error
[15:58:24][E][component:204]: touchscreen was marked as failed

[ssieb]

That's a known i2c issue. Try using the .3 release.

[Minikea]

That's a known i2c issue. Try using the .3 release.

Hello,
thanks for your quick reply.
If you mean the last 2025.8.3 release, I'm already with this release.

I use ESPHome in Home assistant. OS (up to date).
I use this NodeMCU-32S board
is there a workaround to this issue?
I just see this comment, I will try it.

[Minikea]

for reference, the workaround frequency: 400 didn't work.
but the

external_components:
 - source: github://esphome/[email protected]
   components: [i2c]
   refresh: never

did.
so the .3 release do not completely correct the bug found in 2025.8.0.
now I must find which platform to use because gt911 do not seems to be the one.