This was a really annoying error that popped up initially when I started developing PlatformIO applications with the ESP8266 variants on my Ubuntu Linux laptop. I kept thinking the problem was that Ubuntu had bad drivers for the CH34x USB-to-Serial chip on the NodeMCU (and other) devices. There is lots of information on the web about patching the… Read More »
This documents an attempt to build a test application on a laptop with Ubuntu 22.04 installed. The target is an open hardware NodeMCU (Lua) ESP8266 board with an ESP-12E Wi-Fi module and CH340G USB-to-serial driver chip. Setup the Edit/Build Environment Test Project #1 – LED Blinker Plug in a NodeMCU, ESP-12E, or other ESP8266 device, build then upload… Read More »
All three commands allow the user to find files on their system. Each has different strength. locate Command The locate command (man page) is very fast since it builds a database for file searches and doesn’t have to walk all the directory trees every time. It does require an occasional maintenance update command but it is not a… Read More »
Official Linux Documentation Linux commands and an enormous amount of information on the operation system can be found at a Linux Documentation site. This also includes the ebook Dive Into Python and other material. For my desktop, the Ubuntu distro has its own help. Upgrade system packages with “apt” “apt” is primarily designed for user interaction on the… Read More »
The ESP8266 is a System on Chip (SoC), manufactured by the Chinese company Espressif. The central processor is a Tensilica L106 32-bit microcontroller unit (MCU) and a Wi-Fi transceiver. It has 11 GPIO pins and an analog input also. Note that the ESP8266 chip itself has 17 GPIO pins, but 6 of these pins (6-11) are used for communication with the on-board flash memory chip.… Read More »
This open source hardware variant is intended for development. It has an ESP-12S to provide with more pins available for makers but is to be treated as if the module is an ESP-12E. See my post on the ESP-12E for all the information. Additional Information
Some of the sites for information on the ESP3266 line of processors integrated into PCBs is Elecrow (site may not work), Utmel Electronics and Electronics Hub. This excerpt compares and contrasts the devices. Other modules specifications at Ai-Thinker Technology. Good source for pin functionality and tutorials at Random Nerd Tutorials. ESP8266 is a low-cost and high-performance wireless SOC,… Read More »
Datasheets for items I have used in projects for quick reference. ICs AT24C32 – Atmel 2-Wire (I2C) Serial EEPROM, 4096/8192 8-bit words (Module using part) DS3231 – Extremely Accurate (I2C) RTC/TCXO/Crystal (Module using part)
As the website says – WorldTimeAPI is a simple web service which returns the current local time for a given timezone as either plain-text or JSON. This is a great site to get the current time/date in order to keep your IoT clock accurate. It is not intended to be used for commercial applications. The API can go… Read More »
Back in the old days (?) of .NET 4.8, assembly version numbers were located in the AssemblyInfo.cs file. Now in .NET 6.0 (and beyond), the Assembly.Info.cs file does not exist. Now you change the version by editing the project (*.cs) file. Edit the Project File Double click the project file and the contents are now immediately visible. (No… Read More »