HTML allows you to create links to topics within a web page. Normally you would do this by defining a target location with the ID of a regular HTML anchor, image, or paragraph. To create a clickable link to allow the user to go to one of these targets, you would use an anchor tag and put a… Read More »
The MCP2221x is used to allow a host computer to communicate with hardward via USB. The interface chip does not require any onboard logic to provide a bidirectional UART, and I2C interface. Using the appropriate host driver software to communicate to the chip, you can configure the remaining 4 GPIO pins as up to three 10-bit ADCs, single… Read More »
I have been working with an extension from a software company that I could not uninstall by going through the usual Visual Studio Extensions ->Manage Extensions -> Installed screen. Ultimately I determined that the extension had a bug in the uninstaller. Face it – how much does an uninstaller get tested anyway? I followed the instructions in many… Read More »
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 »