A low power, low voltage source is connected between two conductors that should not be connected and the amount of current is measured. There are two common ways to test for a short: From the voltage and current the resistance of the connection can be calculated and compared to the expected value. A known current is passed down the connection and the voltage that develops is measured.
Ethernet testing kit series#
This type of test can be done with a series combination of a battery (to provide the current) and a light bulb (that lights when there is a current). If there is current the connection is assumed to be good. There are two common ways to test a connection: The second phase, called the "shorts test" makes sure there are no unintended connections. The first phase, called the "opens test" makes sure each of the intended connections is good. Generally, the testing is done in two phases. If a connection "goes to the wrong place" it is said to be "miswired" (the connection has two faults: it is open to the correct contact and shorted to an incorrect contact). When an unintended connection exists it is said to be a "short" (a short circuit). When an intended connection is missing it is said to be "open". Both portions of such a tester will have connectors compatible with the application, for example, modular connectors for Ethernet local area network cables.Ī cable tester is used to verify that all of the intended connections exist and that there are no unintended connections in the cable being tested. A cable tester may be connected to both ends of the cable at once, or the indication and current source portions may be separated to allow injection of a test current at one end of a cable and detection of the results at the distant end. A cable tester may also have a microcontroller and a display to automate the testing process and show the testing results, especially for multiple-conductor cables.
Ethernet testing kit portable#
For details, see GPIO Header 1.Generally a basic cable tester is a battery operated portable instrument with a source of electric current, one or more voltage indicators, and possibly a switching or scanning arrangement to check each of several conductors sequentially. This header provides six unpopulated through-hole solder pads connected to spare GPIOs of ESP32.
Ethernet testing kit serial#
Holding down BOOT and then pressing EN initiates Firmware Download mode for downloading firmware through the serial port. Two LEDs (green and red) that respectively indicate the “Link” and “Activity” statuses of the PHY.ĭownload button.
The magnetics also provide galvanic isolation between the transceiver and the Ethernet device. The Magnetics are part of the Ethernet specification to protect against faults and transients, including rejection of common mode signals between the transceiver IC and the cable. The PHY supports the IEEE 802.3/802.3u standard of 10/100 Mbps. The connection between PHY and ESP32 is done through the reduced media-independent interface (RMII), a variant of the media-independent interface (MII) standard. The physical layer (PHY) connection to the Ethernet cable is implemented using the IP101GRI chip. Provided DC 5 V to 3.3 V conversion, output current up to 2 A.Ī pair male and female header pins for mounting the PoE board (B). This red LED turns on when power is supplied to the board, either from USB or 5V Input. The 5V power supply interface can be more convenient when the board is operating autonomously (not connected to a computer). Toggling the switch to 5V0 position powers the board on, toggling to GND position powers the board off. Power supply for the board as well as the communication interface between a computer and the board. See ESP32-Ethernet-Kit V1.2 Ethernet board (A) schematic. The FT2232H chip enhances user-friendliness in terms of application development and debugging. FT2232H also features USB-to-JTAG interface which is available on channel A of the chip, while USB-to-serial is on channel B. The FT2232H chip serves as a multi-protocol USB-to-serial bridge which can be programmed and controlled via USB to provide communication with ESP32. Two LEDs to show the status of UART transmission. For details, see GPIO Header 2.Ī 4-bit DIP switch used to configure the functionality of selected GPIOs of ESP32. This ESP32 module features 64-Mbit PSRAM for flexible extended storage and data processing capabilities.įive unpopulated through-hole solder pads to provide access to selected GPIOs of ESP32. The table below provides description starting from the picture’s top right corner and going clockwise.
ESP32-Ethernet-Kit - Ethernet board (A) layout (click to enlarge) ¶