The best USB power meters for makers, charger testing and low-power electronics: FNIRSI FNB58, ChargerLAB POWER-Z KM003C, AVHzY CT-3, RD UM25C, Plugable USB-C meter, Treedix and the Nordic PPK2 current profiler, compared on accuracy, logging, PD support and current range, with verified Amazon links.
The best bench power supplies for electronics hobbyists: Tekpower TP3005T and Korad KA3005D linear supplies, Wanptek, Jesverty and NANKADF switching units, Riden RD6006W and DPS3005 programmable modules and the pocket Alientek DP100, compared on noise, current, presets and control, with verified Amazon links.
The best logic analyzers for decoding I2C, SPI, UART, CAN and more: DSLogic Plus, Saleae Logic Pro 8, Innomaker LA2016, Kingst LA1010, Digilent Analog Discovery 2 and 3, Hantek 6022BL and a budget 24 MHz analyzer, compared on sample rate, channels, voltage levels and software, with verified Amazon links.
The best oscilloscopes for beginners and electronics hobbyists: FNIRSI 2C53T and HANMATEK HO52 handhelds, the Hantek 6022BE USB scope, FNIRSI pocket scopes with signal generators and component testers, plus Hantek 2D42 and DSO138 kit options, with bandwidth advice and verified Amazon links.
The best multimeters for ESP32 work: KAIWEETS HT118A, Fluke 117 and 101, AstroAI, ANENG AN8008, Klein MM600 and INNOVA 3320, compared on microamp ranges for deep-sleep current, continuity speed, true-RMS and safety, with ESP32 measurement tips and verified Amazon links.
The best soldering irons for ESP32 work: Hakko and Weller stations, Pinecil V2, TS101 and FNIRSI USB-C smart irons, budget YIHUA and X-Tronic kits, plus tip, temperature and solder advice for headers, castellated XIAO boards, battery leads and sensor wiring, with verified Amazon links.
The best books for learning the ESP32, from beginner Arduino and MicroPython guides to ESP-IDF IoT development, FreeRTOS, wireless communication and professional embedded design, with who each book suits and verified Amazon links.
Build an ESP32 door access system: RC522 and PN532 RFID/NFC readers, an AS608 fingerprint sensor, 4×4 keypads, Wiegand keypads and 125kHz readers, 12V solenoid locks, door strikes and 600lb maglocks, door contact sensors and NFC tags, with security and fail-safe advice and verified Amazon links.
Expand and protect your ESP32 with the right interface modules: 3.3V-5V logic level converters, TXS0108E shifters, SN65HVD230 CAN and RS485 transceivers for Modbus, MCP23017 and PCF8574 I/O expanders, the ADS1115 16-bit ADC, MCP4725 DAC, TCA9548A I2C mux, CD74HC4067 analog mux and PC817 optocouplers, with verified Amazon links.
Turn cheap ESP32 boards into Home Assistant Bluetooth proxies and fill your home with low-cost BLE sensors: Govee H5075 and H5100 thermometers, Shelly BLU H&T, door, motion and button sensors, SwitchBot meters, iBeacon tags for presence, plus the best ESP32 boards to run as proxies, with verified Amazon links.