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Add NessoN1 connection note to README

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@@ -85,6 +85,11 @@ See examples: [NFCA Emulation](examples/UnitUnified/NFCA/Emulation) and [NFCF Em
- I2C version: MIFARE Plus SL3 operation has issues.
### NessoN1 Connection
GROVE port (port_b) on NessoN1 uses SoftwareI2C (M5HAL Bus), which causes I2C register polling latency too high for ST25R3916 RF timing requirements.
Use **QWIIC port (port_a)** with a QWIIC-GROVE conversion cable instead.
> **Note:** GROVE port support may be added in a future update if SoftwareI2C performance improves.
## Related Link