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Inexpensive RS485 module with ESP32 (hardware serial)
In the previous article, I reviewed how to connect very cheap RS485 module to the ESP8266. Generally speaking, it’s MAX485 chip without any protection against troubles like lightning and cost about 0,3 $ It’s better to purchase wholesale by 5 … Continue reading
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
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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