Elecfreaks IoT:bit for micro:bit

IoT:bit is an expansion board for exploring IoT with micro:bit. It's been redesigned to be compatible with both the micro:bit v1 and micro:bit v2! IoT:bit uses an ESP8266 chip for WiFi, and a serial port to communicate with the micro:bit. It also has breakouts for most I/O ports on the micro:bit, so you can hook up 3V devices such as LEDs, photosensors or servos. IoT:bit also features an on-board buzzer, and an RTC clock for maintaining accurate time without a power supply.  FEATURES Integrated ESP12F WiFi, RTC and passive buzzer module Extends most I/O ports  Silk-screen labels for main onboard components Separate I2C interface, to directly plug in OLED, BME280, etc Lego spaced mounting holes (4 standard spacing Lego fixed holes)   DIMENSIONS Product size：71mm x 63mm x 23mm PCB thickness：1.5mm Hole diameter：2.4mm   Pin interface drawingIntroduction of main module SOFTWARE SUPPORT Makecode blocks https://makecode.microbit.org JAVASCRIPT Click on `JavaScript` in the `ma