(Safe Pins, ADC, I²C, SPI – and why there is no touch) ESP32-C2 is the small brother in the ESP32 family: Wi-Fi 4 + BLE 5, RISC-V core at up to 120 MHz, and only 14 GPIOs – the ESP8684…
This project shows how to do a simple LoRa “Hello World” send & receive test using two TTGO LoRa32 (SX1276) boards with built-in 0.96″ SSD1306 OLED displays. We’ll configure one board as a sender, which sends a counter every second,…
The ESP32-S3-DevKitC-1 is Espressif’s entry-level development board for the ESP32-S3-WROOM-1 / 1U / 2 modules – a Wi-Fi + Bluetooth LE SoC with dual-core CPU, vector instructions for AI, and plenty of GPIOs. Espressif Docs This guide focuses on pinout…
The ESP32-S2-DevKitC-1 is Espressif’s entry-level development board for the ESP32-S2 – a single-core Wi-Fi microcontroller with native USB, 43 GPIOs, ADC, DAC, touch, and a rich set of peripherals. This guide focuses on pinout and GPIO selection for the DevKitC-1,…
1. ESP32 DevKit / ESP-WROOM-32 Overview The ESP32-WROOM-32 module exposes up to 32 GPIO pins, plus power, enable and boot configuration pins. These GPIOs are highly multiplexed: the same pin can often be used as digital I/O, ADC, touch, I²C,…
ESP32 versions fall into 5 main families: the original ESP32 (Wi-Fi + Bluetooth Classic), S2/S3 (USB, higher performance), C2/C3/C5/C6 (RISC-V, cheap; C6 adds Wi-Fi 6 + Thread/Zigbee), H2 (Thread/Zigbee only, no Wi-Fi), and P4 (high-performance compute, no Wi-Fi).This guide compares…
I²C is one of the easiest ways to send data between microcontrollers. ESP32 and ESP8266 both support hardware I²C, and you can connect them directly using just two wires: SDA and SCL and common GND. This guide shows a complete…
ESP-NOW is a fast, connectionless communication protocol developed by Espressif. It allows ESP32 boards to exchange small packets (up to 250 bytes) with extremely low latency and very little overhead — perfect for sensors, dashboards, wireless controllers, and battery-powered devices.…
(Universal method — works with any ESP8266 board) ESP-NOW is one of the fastest and most reliable ways to send data wirelessly between ESP32/ESP8266 devices.Unlike Wi-Fi or MQTT, it requires no router, no pairing, and has almost zero latency (1–3…
