ESP32-POE-ISO is OSHW certified Open Source Hardware with UID BG000021
ESP32-PoE-ISO is an ESP32-powered WIFI/BLE/Ethernet development board with Power-Over-Ethernet feature. ESP32-POE-ISO has 3000VDC galvanic insulation from the Ethernet powering. It is the perfect addition to any project that requires connectivity.
The PoE is currently handled by TPS2375PW chip that is IEEE 802.3-compliant, including pre-standard (legacy) PoE support. The PoE powering requires at least 37V DC to operate successfully. The board takes power from the Ethernet cable and can be expanded with sensors and more. Perfect solution for Internet-of-Things projects.
ESP32-POE-ISO-EA has ESP32-WROOM-32UE module with U.FL connector and external antenna attached, which allow mounting in metal box. All "-EA" variants have antenna included!
ESP32-POE-ISO and ESP32-POE-ISO-EA operate in the commercial temperature range 0-70C
ESP32-POE-ISO-IND and ESP32-POE-ISO-EA-IND are functionally identical, but use components rated for industrial temperature operation -40+85C
ESP32-POE-ISO-WROVER comes with ESP32-WROVER-E with 4MB flash and 8MB PSRAM, while ESP32-POE-WROVER-EA uses ESP32-WROVER-IE (again with 4MB flash and 8MB PSRAM)
ESP32-WROOM-32 - WiFi and bluetooth module (ESP32-WROOM-32UE in antenna variants)
High reliable industrial grade -40+85C available (-IND)
CE-RED and LVD certification
Original design by OLIMEX Ltd
Low power design - 200uA consumption in deep sleep
Ethernet 100Mb interface with IEEE 802.3 PoE support
3000VDC galvanic insulation between the PoE Ethernet part and board's power supply circuit
ESP32-PoE-ISO doesn't work well with bauds over 115200. What to do?
Some older drivers might have wrong timings, causing worse throughput. Download and install the latest drivers for CH340. If you are using Linux make sure to try with these drivers: high-speed driver for Linux
Is it safe to have USB powering and PoE powering connected and enabled at the same time?
Yes, when using ESP32-POE-ISO it is safe to have them both enabled.
Where are I2C, UART, SPI pins exposed?
The ESP32 chip has very advanced multiplexing and you can define any free GPIO pin for I2C, UART, SPI operation as long as you are within the maximum supported (some penalties to SPI's maximum freqncy apply, when not using the dedicated pins). Notice that some ESP32 pins can only be inputs. Defining pins is for another job is purely software effort.
I provide 24V to the input of ESP32-PoE-ISO's Ethernet but it doesn't seem powered. What is the problem?
TPS2375PW (Si3402) would NOT work with 24V DC. The recommended voltage is 48V DC and the minimum is around 37V DC. For more info refer to TPS2375PW's (Si3402-B's) datasheet.
I power the board from the Ethernet connector. What current do I have availabe for additional circuits?
The isolated DCDC that we use provides up to 2W, this means 400mA @ 5V, 100mA are reserved for the battery charge (available if no battery is connected) and 100mA are provided for ESP32, which leaves up to 200mA @ 5V for your additional circuit.
I power the board from the battery connector. The LEDs remain off. Is it borken?
Probably not. This is a low-power design. The LEDs would not turn on when operating on battery to save power. You need other ways to determine if it works or not. For example, something over the serial lines or over the Ethernet (with no PoE enabled else it would get powered from there).
R41 gets very hot! What is this component? Is it safe? Can I remove it?
This resistor is required by the IEEE standards. It is used for MPS (maintain power signature). Search online "maintain power signature poe" to get the general idea.
We didn't ensure MPS in the first hardware revisions of the board (e.g. had no resistor R41 in place), but this caused availability problems when using some power saving modes - the board consumed less wattage than PoE equipment can detect, which led to PoE equipment shutting the board off.
If you have soldering experience and the resistor bothers you, you might try desoldering it and see if that effects your setup negatively. Notice that we don't recommend doing so.