ESP32, Ethernet, POE, 8IN-8OUT, Arduino open source software

September 2, 2021 – 6:47 am

I designed a new product, that it’s available now.

140x80mm board, DIN rail mount connectors

ESP32, Ethernet, POE  802.3af class 0

8 digital isolated inputs

8 digital source outputs , OUT 24V DC, up to 60mA / port, to drive 24V DC relays

micro USB for ESP32 programming

open source schematic

open source Arduino software, multi socket MODBUS TCP

for more info, or for purchase, please contact me at



PIC32MZ Zabbix Active Agent

August 20, 2017 – 11:23 am

- New Zabbix Active Agent and SNMP temperature/humidity agent with BOX

- 32bit PIC32MZ MCU, 1Amp small relay on the board, support up to 24pcs  1Wire sensors.

Support Zabbix Active Agent version 2.2

- Powered from 5V mini USB supply

To buy this products, visit Buy Products page.


1Wire True AC Power Meter / Energy counter

September 12, 2014 – 7:29 pm

New 1Wire device available. 1Wire True AC Power Meter / Energy counter.  79.00 Euro/pcs.

Works together (is supported by)  SNMP temperature/agent, master device.

Based on Microchip MCP3911 Analog Front End chip.

DSPIC33F for 64bit Math calculation, 4Ksps.

PIC16F for 1Wire communications, isolated with optocouplers by 230V part.

It’s made for 230V AC, European version.

Precision class 0.5


IRMS, up to 16A, resolution 1mA

URMS, from 170VAC to 300VAC, resolution 100mV

Active Power, resolution 1W

Reactive Power, resolution 1VAR

Apparent Power, resolution 1VA

Power factor, from 0.100 to 1.000

Energy counter, up to 999999.999 KWh

The device have an 20Amp relay protection, that can be set to switch off

the output at Low or High voltage detection.

Can be connected, up to 8 devices on the same 1Wire bus.


New SNMP temperature/humidity agent and sensors

April 22, 2014 – 11:30 am

New SNMP temperature/humidity agent with BOX available. 39.00 Euro/pcs.

MCU PIC18F67J60, AT45DB041D external flash, 32KB external SRAM,

TFTP Bootloader. Support up to 8 sensors on the one single UTP cable BUS.

The sensors are configured from the  web page.

RJ45 connector for sensors BUS.

Powered from 5V mini USB PSU. (not included in the price)


Temperature+Humidity sensor with BOX.  34.00 Euro/pcs.

HIH-5030 humidity sensor, RJ45 connector for sensor BUS.


Temperature sensor with cable and RJ45 connector. 7.00 Euro/pcs.


BUS splitter, to connect sensors between them.  5.00 Euro/pcs.


220AC to 5V DC, mini USB PSU, european plug. 15.00 Euro/pcs.


To buy this products, visit Buy Products page.

SNMP Temperature Agent V4_3

April 18, 2012 – 7:13 pm

New “SNMP Temperature Agent V4_3″ available.

MCU PIC18F66J60, AT45DB041D external flash, 3 Analog and 3 Digital inputs.

TFTP Bootloader.


You can buy this device from here:

SNMP Temperature Agent source code

April 18, 2012 – 4:28 pm

Source code for SNMP Temperature Agent, available here: SNMP_T_A

This archive contain:

- schematic

- TFTP bootloader source code, MikroPascal

- Firmware source code, MikroPascal (including Ethernet PIC18F97J60 full source code)

- and more…


AC current SNMP Agent

April 11, 2012 – 5:53 pm

New design “AC current SNMP agent” available.

PIC18F66J60, AT45DB041D, Up to 25Amp AC current measurement, SNMP

TFTP bootloader.

You can buy this device from here: