avrdude -CC: avrdude.conf -v -patmega328p -carduino -PCOM21 -b115200 -D -Uflash:w:sketch.ino.hex:i
avrdude -CC: avrdude.conf -v -patmega328p -carduino -PCOM21 -b57600 -D -Uflash:w:sketch.ino.hex:i
Launch of the room thermostat project - Arduino + Ethernet Wiznet W5100 / W5500
The Ethernet (room) thermostat project also exists in a free version, which is available in the Githube repository. The version contains a total of 6 machine - precompiled programs for the Arduino Uno platform. Machine code (.hex) guarantees that the program is compatible and has the same functionality for all devices to which it is loaded and run. Firmware upload is quick and easy via the AVRDUDE / XLoader with a graphical interface. The main application starts immediately after the firmware is loaded. The code is thus universal and provides an opportunity to provide the author interested in trying out the project of its build without access to the source (.ino) code. Since each Ethernet thermostat has the same - predefined MAC address, it is possible to use only one thermostat in the LAN network, otherwise there will be a conflict of MAC addresses and not a single thermostat will communicate.
| Firmware name | Shield / module | IPv4 |
|---|---|---|
| dynamic_W5100.hex EN | W5100 | assigned via DHCP (also contains maintain to extend lease time / request a new IP) |
| dynamic_W5500.hex EN | W5200 - W5500 | assigned via DHCP (also contains maintain to extend lease time / request a new IP) |
| static_W5100_1_254.hex EN | W5100 | 192.168.1.254 |
| static_W5100_4_1.hex EN | W5100 | 192.168.4.1 |
| static_W5500_1_254.hex EN | W5200 - W5500 | 192.168.1.254 |
| static_W5500_4_1.hex EN | W5200 - W5500 | 192.168.4.1 |
| PHY_thermostat_EN | ESP32 + PHY LAN8720 | assigned via DHCP (visit WiFi thermostat page for upload firmware instructions) |
To upload machine code to Arduino, it is possible to use the AVRDUDE tool, which also uses the Arduino IDE environment to upload the compiled program. The tool can be run directly from the command line, but it is necessary to set all configurable data correctly, so it is not suitable for less experienced programmers or laymen. XLoader is a Windows application (tool) with a simple graphical interface that allows the selection of firmware - machine code (.hex), the target platform and can dynamically show the COM port on which the device is located. It allows you to burn firmware to AVR platforms, i. Arduino Uno, Nano, Duemilanove (AtMega328 / AtMega168), Arduino Mega (AtMega1280 / AtMega2560). By simply clicking on Upload, the machine code can be uploaded automatically (XLoader uses the AVRDUDE tool similar to the Arduino IDE). The XLoader window informs about the successful upload in the form of a list of the number of bytes uploaded.
COM port selection
In case of uploading firmware via AVRDUDE, it is necessary to specify the COM port manually directly in the command for uploading firmware to the microcontroller. You can find the current port where the microcontroller is logged in in Device Manager. The device is most often marked as USB-SERIAL CH340 in the case of clones, or e.g. Arduino Uno in the case of original Arduino boards. For Arduino Nano versions, the FT232RL device designation can also be found if it uses the FTDI232RL converter. The baud rate for the New Bootloader is: 115200 baud / s, for the Old Bootloader: 57600 (especially the Chinese version of the Arduino Nano V3.0). The XLoader interface itself warns of an incorrect baudrate with a message stating that the firmware upload failed.
