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ESP32 Guides, Projects & Board Comparisons (2026)

Practical ESP32 tutorials, GPIO references, Home Assistant integrations and real-world projects.

ESP32-H21 Announced: Low-Power Thread and Bluetooth LE SoC

Espressif has announced the ESP32-H21, a new low-power wireless SoC designed for Thread, Matter, Zigbee, and Bluetooth Low Energy devices. The company published the announcement on March 3, 2026, positioning the chip as an enhanced option for battery-sensitive IoT products. The main point of the ESP32-H21 is simple: it is an incremental update to the ESP32-H2 that adds an on-chip DC-DC converter to reduce active current consumption and improve battery life. That sounds like a small hardware change, but for always-connected sensors and low-power mesh nodes, it is exactly the sort of improvement that matters in the real world. Espressif…

ESP32-C3 SuperMini vs ESP32-C6 SuperMini: GPIO, USB and ESPHome Support

ESP32-C3 SuperMini vs ESP32-C6 SuperMini compared for GPIO, native USB and ESPHome. Covers safe pins, USB differences, ESP-IDF, Thread and…
M5Stack PaperMono: Pinout, Arduino Setup and PaperS3 Differences

M5Stack PaperMono pinout and Arduino setup, with PaperMono-Lite and PaperS3 differences, display-driver cautions, power control, microSD and troubleshooting.
ESP32-S3 USB Not Detected: Boot Mode and Upload Recovery

Fix an ESP32-S3 that is not detected over USB. Covers native USB vs USB-UART, BOOT/RESET recovery, ROM download mode, Arduino…
Seeed XIAO ESP32-C6: Pinout, Battery Power and ESPHome

Seeed XIAO ESP32-C6 pinout and ESPHome guide: GPIO mapping, native USB, battery charging, deep sleep, antenna switching, ADC, Thread/Zigbee support…

Home Assistant Energy Dashboard Troubleshooting for ESPHome

Fix ESPHome sensors missing from the Home Assistant Energy dashboard: device_class, state_class, W vs kWh, total_increasing resets, statistics errors, integration…
ADS1115 with ESPHome: Gain, Differential Inputs and Calibration

Use ADS1115 with ESPHome correctly: gain ranges, single-ended vs differential inputs, safe voltages, sample rate, CT clamps, voltage dividers and…
ESP32 IR Blaster Troubleshooting: Range and AC Commands

Fix ESP32 IR blaster range, missed commands and air-conditioner control problems. Covers LED drivers, carrier frequency, raw captures, ESPHome climate…
ESPHome pulse_meter vs pulse_counter for Utility Meters

ESPHome pulse_meter vs pulse_counter for electricity, water and gas meters: low-flow accuracy, debounce, pulse totals, conversion formulas, ESP32 PCNT limits…