RE: SHT4X: Failed to reset the device.

Vidar Berg — Fri, 05 Dec 2025 12:46:30 GMT

Hello,

The error is logged in the driver init here: https://github.com/nrfconnect/sdk-zephyr/blob/c09c6abd11695d6b9c2ea24c4e88822eee9ff3f9/drivers/sensor/sensirion/sht4x/sht4x.c#L191. I assume the sensor might simply not have been ready to receive the command this early on startup and therefore NACKed it since the log shows that the measurement commands sent afterwards work just fine. To confirm this theory you could try adding a delay before the reset command. E.g.,

    /* Extra delay */
    k_sleep(K_MSEC(SHT4X_RESET_WAIT_MS));

	rc = sht4x_write_command(dev, SHT4X_CMD_RESET);
	if (rc < 0) {
		LOG_ERR("Failed to reset the device.");
		return rc;
	}

Best regards,

Vidar