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 »
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 »