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Module Sourced Accessory Power

The +VDD1 and +VDD3 power rails rise during cold boot of the module PMIC, so both rails are stable before the SoC is taken out of the reset and before code execution starts. They are intended to activate voltage regulators on the expansion board so system devices can be available when the module code execution begins.

Making a Wi-Fi Connection

Connman

Connman is a connection manager daemon that lets you manage network connections over Wi-Fi* and is designed for use with embedded devices.

Starting connman

When the connman service starts, wpa_supplicant automatically starts. By default, connman starts at boot time. To prevent automatic start at boot time issue

USB SSH Networking

Overview

This section outlines how to create a local tunnel between the module and a PC over USB allowing an SSH connection between the two. This requires that the PC connects both to the micro-USB connector for UART serial communication as well as the USB Type-C connector for SSH.

Instructions

The instructions below give the steps for setup with an Ubuntu Linux* PC. Similar functionality can be implemented with a Windows* or macOS* connection.

Camera GStream Video

Recording and streaming video

Make sure the module is connected to a network. Next, find the IP address of the receiving end by running ifconfig on the receiving machine. Then, on the receiving machine, start to listen with:

Graphics Framework

The Reference Operating System for IoT graphics stack consist of i915 GPU kernel driver, the Mesa user space 3D graphics driver, the xf86-video-intel 2D driver, the libDRM library, the Cairo 2D library, the libVA library, and the Intel backend driver for the libVA library. An overview of the graphics stack and its relationships is shown below.

The kernel driver also comes with intel-gpu tools which contain basic test, profiling, and support wrappers for handling PM, batch buffer, and ioctl calls.

Module Board-to-Board Connectors

The Intel® Joule™ module uses two board-to-board connectors to separate communication buses, power, and GPIO signals to the expansion board. Module connectors J6 and J7 mate with Hirose* Electric Co LTD part number DF40C-100DS-0.4V or other compatible hardware.

To properly interface with the module, keep the board-to-board connectors parallel, and maintain 19 mm between long-edge centerlines and 15.5 mm between short-edge centerlines, as shown in the figure below.

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