Electronic, 3D printing and embedded programming
SSD1306 IC is used for the most commons OLED display is a single-chip CMOS OLED/PLED driver with controller for organic / polymer light emitting diode dot-matrix graphic display system. It consists of 128 segments and 64 commons.
We are going to use it with SPI and i2c and learn the basic function.
I’m going to use the esp32, and the first problem was how to put It on breadboard, so we are going to print an adapter, then I build a PCB to program.
ESP32, continue the little guide on how to use this low cost but powerful microcontroller with WIFI integrated.
Pinout, specification and IDE configuration to start use your esp32-wroom-32 esp32-s variant.
ESP32-S high resolution pinout and specs
ESP32-wroom-32 high resolution pinout and specs
Here a tutorial on E32 LoRa (Long Range) device very cheap and very long range (from 3Km to 8Km).
In this chapter we are going to wake on radio the LoRa E32 and microcontroller and we show the ESP32 DEV KIT v1 shield created for this device.
The ESP32 has enough resources to be able to use a FAT system which is certainly more expensive in terms of resources, but which offers large dimensions and few limitations, as well as compatibility with various devices.
LittleFS was recently added and focuses on higher performance and directory support, but has a higher resource consumption and occupancy per file, although not by default for esp32 it should be remembered that it takes up less resources than FatFS.
When you use a microcontroller an important features is store data, for logging or setting, for a web server or to show image. The better solution is an SD card, because It’s simple, small and low power device.
Now we are going to look how to connect and use with standard SD library with esp32.
ESP32 has the ability to take advantage of many power saving modes, there are also many wake up sources, some are specific for light sleep and in this article we will focus on UART and GPIO wake up.
