Bee Data Logger
Development BoardESP32-S3 based data logging board with DS3231 RTC, microSD card slot, dual STEMMA/Qwiic connectors, and LiPo charging. Achieves ~21µA deep sleep current. Open source hardware with Arduino and CircuitP
ESP32-S38MBWiFi Wi-Fi 4BLE BLE 5.0
~$35View
Heltec WiFi Kit 8
Development BoardESP8266-based IoT development board by Heltec with built-in 0.91-inch OLED display, Li-Po battery management, and WiFi connectivity in a compact 50.9x18.2mm form factor.
ESP8266520 KB4 MB17 GPIOWiFi 802.11n
~$8View
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