ESP32: i2c simtests and fixes#2302
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Track open/closed I2C NIF resource state, clean up command handles on error paths, and reject closes while a transmission is active. Ensure driver-delete failures do not leave the resource half-closed, and document the ESP32 I2C fixes in the changelog. Signed-off-by: Peter M <petermm@gmail.com>
Wire a BMP180 into the ESP32 Wokwi simulator and add an Erlang test that exercises I2C through both port-driver and NIF paths. Cover successful sensor reads, NACK recovery, split transactions, and ownership-contention errors. Signed-off-by: Peter M <petermm@gmail.com>
bettio
approved these changes
May 28, 2026
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Adds i2c simtest on esp32, this in preparation for adding the newer i2c esp-idf driver soon.
Includes fixes for various issues surfaced:
These changes are made under both the "Apache 2.0" and the "GNU Lesser General
Public License 2.1 or later" license terms (dual license).
SPDX-License-Identifier: Apache-2.0 OR LGPL-2.1-or-later