Author Archives: Andrey Fedorov

Comparison of the hidden wiring detector Bosch GMS 100 and MD120

Hidden wiring Detector is an irreplaceable thing during repair. Of Course, you can save on this tool, but often such savings are spent hours of time to recover damaged wiring. In The article I compare the quality of the voltage … Continue reading

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GPIO Extension using MCP23017 (CJMCU-2317) on ESP8266

When the ESP8266/ESP32/Arduino lacks GPIO you can use the MCP23017 chip to increase the number of ports by 16. Chip Control is performed on two wires I2C, communication is convenient. The Price for the chip is about $0.8. On Aliexpress … Continue reading

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How to work with RS485 interface on ESP32

In the last article, I mentioned how to work with RS485 module XY-485 with ESP8266. In this article, I’ll review how to work with XY-485 module with microcontroller ESP32. In the next article, I’ll review using very cheap MAX485 based … Continue reading

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Bees supervised

The Last few years the term "Internet of Things" (Internet of Things, IoT) is gaining popularity. Technology is seen as one of the engines of progress and economic development in the coming years. It would Seem that the term IoT … Continue reading

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Connection of GSM module SIM800C to ESP8266/ESP32/Arduino

For development of IoT devices it is necessary to use various GSM modules. Unfortunately, NB IoT or LoraWAN chips at the moment cost at least three times more expensive, so in most projects their use is unjustified until the cost … Continue reading

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Modbus Configuration files for ESP8266/Arduino

At development of devices on the basis of microcontrollers ESP8266/ESP32/Arduino working through RS-485 on protocol Modbus important moments is configuration of Modbus operations. There is no Sense to "reinvent the wheel" in the configuration of the format. One of the … Continue reading

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Inexpensive RS485 interface board for ESP8266/ESP32/Arduino

RS485 interface providing a noise-resistant connection with the equipment at a distance of up to 1200 meters. The question is how to ensure a secure connection of the microcontroller to the equipment operating on the RS485 interface? When lightning, electronic … Continue reading

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